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1
Fathalian, Mostafa, Eligiusz Postek, Masoud Tahani, and Tomasz Sadowski. "Effect of Diffusion on the Ultimate Axial Load of Complex-Shaped Al-SiC Samples: A Molecular Dynamics Study." Molecules 29, no. 14 (2024): 3343. http://dx.doi.org/10.3390/molecules29143343.
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Metal matrix composites (MMCs) combine metal with ceramic reinforcement, offering high strength, stiffness, corrosion resistance, and low weight for diverse applications. Al-SiC, a common MMC, consists of an aluminum matrix reinforced with silicon carbide, making it ideal for the aerospace and automotive industries. In this work, molecular dynamics simulations are performed to investigate the mechanical properties of the complex-shaped models of Al-SiC. Three different volume fractions of SiC particles, precisely 10%, 15%, and 25%, are investigated in a composite under uniaxial tensile loading. The tensile behavior of Al-SiC composites is evaluated under two loading directions, considering both cases with and without diffusion effects. The results show that diffusion increases the ultimate tensile strength of the Al-SiC composite, particularly for the 15% SiC volume fraction. Regarding the shape of the SiC particles considered in this research, the strength of the composite varies in different directions. Specifically, the ultimate strength of the Al-SiC composite with 25% SiC reached 11.29 GPa in one direction, and 6.63 GPa in another, demonstrating the material’s anisotropic mechanical behavior when diffusion effects are considered. Young’s modulus shows negligible change in the presence of diffusion. Furthermore, diffusion improves toughness in Al-SiC composites, resulting in higher values compared to those without diffusion, as evidenced by the 25% SiC volume fraction composite (2.086 GPa) versus 15% (0.863 GPa) and 10% (1.296 GPa) SiC volume fractions.
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Adityawardhana, Yudhistira, Anne Zulfia, Bintang Adjiantoro, and Muhammad Yunan Hasbi. "THE EFFECT OF ANNEALING AND COLD FORGING ON MICROSTRUCTURE AND HARDNESS PROPERTIES OF Al-SiC COMPOSITE : A PRELIMINARY STUDY." Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir 27, no. 2 (2021): 67. http://dx.doi.org/10.17146/urania.2021.27.2.6396.
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THE EFFECT OF ANNEALING AND COLD FORGING ON MICROSTRUCTURE AND HARDNESS PROPERTIES OF AL-SIC COMPOSITE: A PRELIMINARY STUDY. Aluminium Metal Matrix Composites (AMMCs) are one of the exciting materials that have an extensive function in various applications. By utilizing reinforcement in the fabrication process, Al composites can produce superior properties such as high strength, good fracture resistance, and of course, lightweight. Therefore, many studies are interested in revealing the characteristics of Al composite materials through various methods and variations of reinforcement. This research is a preliminary study with a scope of work, including observing the effects of annealing and cold forging processes on the microstructure morphology and hardness properties of SiC nano-ceramic reinforced Al composites. The aluminium used in this study is a 7xxx series aluminium alloy. The fabrication process was carried out by stir-squeeze casting method. Microstructure analysis was conducted by optical microscopy and Scanning Electron Microscopy (SEM) equipped with Emission Dispersion Spectroscopy (EDS). The hardness properties of the Al-SiC composite were examined by micro Vickers hardness testing. This research reported that the annealing process influences the grain refinement and hardness properties of the Al-SiC composite. The sample experienced to cold forging has to improve the hardness value. Increasing hardness by forging after anneal may introduce due to the grain compression effect of the dislocation mechanism. Comprehensive research is required to find out other potentials of Al-SiC composite materials. Keywords: Al-SiC composite, annealing temperature, cold forging, hardness, microstructure.
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Sekar, K., and P. Vasanthakumar. "Mechanical and Tribological Properties of Al6063 Hybrid Composites Reinforced with SiC/ZrO2 by Stir Casting and Thixoforming Process." Materials Science Forum 979 (March 2020): 47–51. http://dx.doi.org/10.4028/www.scientific.net/msf.979.47.
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Hybrid metal matrix composites new generation of engineering materials with better mechanical and tribological properties. Al6063 alloy has the matrix material and reinforcement SiC and ZrO2 micro particles are selected for the study. In this work, Al6063/ SiC/ZrO2 hybrid composite fabricated with different wt. % of reinforcements (0.5, 1, and 1.5 wt. % SiC and 1 wt. % ZrO2 constant for all composites) by using stir casting process. The thixoforming process applied to casted composite. The SiC and ZrO2 particle was distributed in the Al-matrix are visible in the SEM micrographs .The hardness value of the composite 34.75% increased due to the addition of constant 1 wt. % of ZrO2 and varying SiC reinforcement particles. The charpy impact strength of Al composite was increased by 23.52 % with the addition of the constant 1 % wt. ZrO2 and 1 wt. % SiC particles. Wear behavior of Al6063/SiC/ZrO2 hybrid composite was tested using pin-on-disc machine. The wear volume loss decreased for 1.5 % wt. SiC and 1 wt. % ZrO2 compared to other composite. The worn surface morphology has revealed that Al6063 base alloy with deep groove. The composite with 0.5%, 1% wt. SiC and constant 1 wt.% ZrO2 showed more debris, dilamation and cleavage particles formed on the pin surface. The composite with 1.5 % wt. SiC and constant 1 wt.% ZrO2 showed less wear loss and smooth surface formation.
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Prathap Singh, S., D. Ananthapadmanaban, D. Elil Raja, et al. "Investigating the Microstructure, Tensile Strength, and Acidic Corrosion Behaviour of Liquid Metal Stir Casted Aluminium-Silicon Carbide Composite." Advances in Materials Science and Engineering 2023 (April 22, 2023): 1–11. http://dx.doi.org/10.1155/2023/2131077.
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The main objective of this investigation is to study the microstructural features and evaluate the tensile strength, hardness, and acidic corrosion resistance of liquid metal stir casted aluminium-silicon carbide (Al-SiC) composite. As reinforcement for the Al alloy matrix, SiC particles were added to the matrix in the percentages of 0%, 10%, and 20%. The microstructure of Al-SiC composite was studied using optical microscope. The effect of addition of SiC particles on tensile strength and hardness of Al-SiC composite was analyzed.. There were significant improvements in tensile strength and hardness for Al–SiC composite reinforced with 20% SiC particles compared to unreinforced Al–SiC composite, and those improvements were of 14.70% and 26.88%, respectively. The evolution of harder SiC islands in the ductile matrix of aluminium alloy reinforce the Al-SiC composite which enhances the strength and hardness of Al-SiC composite. A weight loss method was used to determine corrosion rate. The samples of Al-SiC composite material were immersed in HCl, HNO3, and H2SO4 solutions for immersion times of 30 hours, 56 hours, and 80 hours. It was found that the weight % of reinforcement had the largest contribution to corrosion rate with 49.86% to that of acidic solution with 29.88%, followed by immersion time with 8.85% and acidic solution with a contribution of 29.88% to the corrosion rate. The Al-SiC composite developed using 20 wt. % of SiC particles showed higher corrosion rate due to the interfacial region formed due to the addition of greater wt % SiC particles to the pure alloy.
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Cho, Han Gyoung, and Si Young Chang. "Processing, Microstructure and Mechanical Properties of Hybrid Materials with Al-Mg Alloy and its Composites." Materials Science Forum 544-545 (May 2007): 435–38. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.435.
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The hybrid materials with Al-Mg alloy and its composites reinforced with SiC and Al2O3 particles were prepared by conventional powder metallurgy method. The Al-5wt%Mg and composite mixtures were compacted under a pressure of 400MPa and sintered at 873K for 5h. The obtained hybrid materials with Al-Mg/SiCp composite showed the higher relative density than those with Al-Mg/Al2O3 composite after compaction and sintering. In the composite side of hybrid materials, the SiC particles were densely distributed compared to the Al2O3 particles. The hybrid materials with Al-Mg/SiC composite showed higher micro-hardness than those with Al-Mg/Al2O3 composite. The mechanical properties were evaluated by the compressive test. The hybrid materials revealed almost the same value of 0.2% proof stress with Al-Mg alloy. However, their compressive strength was lower than that of Al-Mg alloy, resulting from the fracture occurring along the microinterface between matrix and reinforcements in the macro-interface.
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G, Hareesha, N. Chikkanna, Saleemsab Doddamani, and Anilkumar S. Kallimani. "Effect of addition of SiC particles on the Microstructure and Hardness of Al-SiC composite." Metallurgical and Materials Engineering 27, no. 1 (2021): 49–56. http://dx.doi.org/10.30544/590.
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This work aims to investigate the effect of the addition of silicon carbide particles on the microstructure and the hardness of the Al-SiC metal matrix composites. The said composite is prepared using the stir casting technique for different weight percentages of the SiC particles. The higher composition of the reinforcement causes the clustering of the particles in the matrix. Thus, research has to be carried out on the aluminum-silicon carbide composites with the reinforcement 3wt%, 6wt%, 9wt%, and 12wt% of SiC particles to obtain the optimized composition. In order to study the microstructure and the reinforcement distribution in the matrix, a scanning electron microscope is utilized. The hardness testing has been carried out using the Vickers’ indentation technique for the as-cast and age hardening conditions. From the microstructural study, it is observed that the microstructure of the said composite exhibits the uniform distribution of the reinforcement. The EDX results show the presence of the reinforcing elements in the Al-SiC composite. From the results obtained from the hardness testing, it is observed that the presence of the carbide element in the composite increases the hardness of the Al-SiC particulate composites.
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Raj Mohan, R., R. Venkatraman, S. Raghuraman, B. G. Chidambaram, S. Balakrishnan, and S. Vishnuram. "An Experimental Study on the Effect of Reverse Two-Step Sintering on Aluminium-Silicon Carbide Metal Matrix Composite." Advances in Science and Technology 106 (May 2021): 78–83. http://dx.doi.org/10.4028/www.scientific.net/ast.106.78.
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Aluminum (Al) - Silicon Carbide (SiC) metal matrix composite is one of the widely used composites in today’s manufacturing industry. Al-SiC composites are produced through several methods such as casting and powder metallurgy, but its production through Reverse Two-Step Sintering (R-TSS) process in powder metallurgy has not been addressed so far. The present work focuses on manufacturing Al-SiC metal matrix composite through reverse two-step sintering process in powder metallurgy. The reinforcement element SiC is embedded with metal matrix element Al in different proportions. Then the consolidated mixture is compacted using the die and punch setup followed by a two-step sintering process suggested by Wong; thereby, the final compact is produced. Further, the processed sample is analyzed for density and hardness tests.
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Behera, Bishnupriya, Renuprava Dalai, Dinesh Kumar Mishra, and Sushant Kumar Badjena. "Development and Characterization of Al2O3 and SiC Reinforced Al-Cu Metal Matrix Hybrid Composites." Materials Science Forum 978 (February 2020): 202–8. http://dx.doi.org/10.4028/www.scientific.net/msf.978.202.
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The present work deals with the synthesis and characterization of Al-Cu-SiC-Al2O3 hybrid metal matrix composite with varying percentage of Al2O3. The synthesized hybrid composite samples were conventionally sintered at two different sintering temperatures i.e. 500°C and 600°C for 1 hr each. SEM investigation predicts the uniform distribution of reinforcing particles. The SEM and XRD results of the sintered composites revealed the presence of a new intermetallic alloy CuAl2 phase along with Al and SiC phases. It is observed that the density and hardness of Al-Cu-SiC-Al2O3 hybrid composite increases with increase in wt % of Al2O3 and sintering temperature.
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Rahman, Mostafizur, and Sadnan Mohosin Mondol. "Mechanical Behaviors of Al-Based Metal Composites Fabricated by Stir Casting Technique." Journal of Engineering Advancements 01, no. 04 (2020): 144–49. http://dx.doi.org/10.38032/jea.2020.04.006.
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Recently, the demands of composite materials used in various engineering applications are growing higher because of their outstanding mechanical and thermal properties. This study represents an experimental investigation to determine mechanical properties of Al-based composites materials using Cu and SiC as reinforcement. Al-30-wt%-Cu, Al-40-wt%-Cu, Al-30-wt%-SiC, and Al-40-wt%-SiC composite bars were fabricated using stir casting process to ensure uniform distribution of reinforced elements. The composite bars were prepared into required shape to conduct test for evaluating mechanical properties. Al-40-wt%-Cu shows improved properties such as, hardness, strength, and impact energy absorption than Al-30-wt%-Cu due to more presence of Cu content. Al-30-wt%-Cu and Al-40-wt%-Cu bars showed improved mechanical properties than both Al-30-wt%-SiC and Al-40-wt%-SiC. It is also seen that Al-30-wt%-Cu and Al-40-wt%-Cu showed high hardness, yield strength, and impact energy absorption compared to Al-30-wt%-SiC and Al-40-wt%-Cu respectively. On the other hand, Al-30-wt%-Cu is 3.5% lightweight than Al-30-wt%-SiC and Al-40-wt%-Cu is 2.11% lightweight than Al-40-wt%-SiC. Al-30-wt%-Cu and Al-40-wt%-Cu showed improved specific hardness, specific yield strength, and specific impact energy absorption compared to Al-30-wt%-SiC and Al-40-wt%-Cu respectively. In addition, Al-40-wt%-Cu showed better mechanical properties among the bars.
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Jin, Hai Yun, Zhen Huang, Bo He, Nai Kui Gao, Liang Shao, and Guan Jun Qiao. "Fabrication and Surface Hardening Properties for SiC/AlN Ceramic Composites with Different SiC Grain Size." Materials Science Forum 724 (June 2012): 143–46. http://dx.doi.org/10.4028/www.scientific.net/msf.724.143.
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In this research, the SiC/Al/h-BN composite ceramics with different SiC grain size were fabricated by the method of preparing the machinable pre-sintered body through Plasma Activated Sintering (PAS), which has the advantage of complex shape formation for precision parts. By hardening treatment, the SiC/Al/h-BN composite ceramics would be changed to SiC/AlN composites, and the relatively higher hardness and mechanical properties could be obtained accordingly. The phase transformation and microstructure were observed and the mechanical and other properties were also measured. The results showed that, for different matrix SiC particle size, change tendency of the bending strength was different with the heat treatment temperature change. And the bending strength of composites with larger SiC grain size was higher than that with smaller SiC grain size.
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Kim, Woo-Jin, Dong-Wha Kum, and Ha-Guk Jeong. "Interface structure and solute segregation behavior in SiC/2124 and SiC/6061 Al composites exhibiting high-strain-rate superplasticity." Journal of Materials Research 16, no. 8 (2001): 2429–35. http://dx.doi.org/10.1557/jmr.2001.0333.
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Interface structure and solute-segregation behavior in the high-strain-rate superplastic SiCp/2124 and SiCp/6061 Al composites were investigated. Evidence for interfacial reaction between reinforcement and Al matrix, which was evident in the superplastic Si3N4p,w/2124 Al and Si3N4p,w/6061 Al composites, could not be detected in the current SiC-reinforced Al composites. Instead, strong solute segregation was observed at SiC/Al interfaces. Extensive formation of whiskerlike fibers was observed at the fractured surface of tensile samples above the critical temperature where particle weakening began to be seen. These results suggest that partial melting occurs at the solute-enriched region near SiC interfaces and is responsible for the particle weakening. The absence of reaction phase in the SiC-reinforced composite may explain why no endothermic peak for partial melting appears in its differential scanning calorimetry curve and why its optimum temperature for superplasticity is generally higher than that of the Si3N4-reinforced composite.
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Cui, Yan. "Microstructural Characterization and Properties of SiC/Al Composites for Electronic Packaging Fabricated by Pressureless Infiltration." Materials Science Forum 546-549 (May 2007): 1597–602. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.1597.
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High volume fraction (63vol.%) SiCp/Al composite for electronic packaging fabricated by pressureless infiltration was characterized by microscopy, physical and mechanical tests. Microscopy observations and XRD analysis indicated that the composite appeared to be free of porosity and macroscopically homogeneous, SiC-Al interface was atomic bonding interface with low thermal resistivity and electrical resistivity, no interfacial reaction products was detected. Examination of the fracture surfaces of the composites revealed that the cracks passed through the SiC particles and Al matrix, no debonding of SiC-Al interface was observed. The fracture mode indicated that the bonding between SiC-Al was sufficient strong. The properties of the composite were noted for its ultrahigh thermal conductivity of 235W/m·K and specific modulus (79.9×105m), low coefficient of thermal expansion (7.2×10-6/K) and density of 2.99g/cm3. The advantages of the composite over traditional materials used as the electronic packages for aerospace applications were analyzed.
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Odiwo, H., K. A. Bello, M. Abdulwahab, A. A. Adebisi, and M. A. Maleque. "PROPERTIES OF ALUMINIUM/ELECTROLESS Ni-COATED SiC COMPOSITES - A REVIEW." FUDMA JOURNAL OF SCIENCES 5, no. 1 (2021): 381–91. http://dx.doi.org/10.33003/fjs-2021-0501-582.
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The combination of properties of Al/SiC composites make them very attractive materials for applications in automotive and aerospace industries. Several techniques are used in developing Al/SiC composites but stir casting process is most commonly used because it is the simplest and cost effective technique. However, composites produced via stir casting suffer from limitations such as low wettability and inadequate bonding between the molten Al & SiC particulates and the formation of degrading interfacial products like aluminum carbide (Al4C3) which degrades the mechanical properties of the composite. Some of the techniques to improve Al-SiC wettability include addition of surface active elements such as magnesium, heat treatment of particles and application of metallic coating on the reinforcements before addition to the melt. Wetting agents alter the composition of the matrix alloy, while heat treatment of the reinforcement does not completely prevent the formation of Al4C3 when utilized. To reduce the direct interaction and promote wetting between reinforcements and molten aluminum during processing, the surface of SiC particulates can be modified by coating via oxidation, sol-gel and electroless processes. Of all these methods, electroless nickel deposition produces the best coatings with uniform thickness and adequate strength. In the present study, influence of electroless nickel-coating of SiC on the mechanical, corrosion and microstructural properties of Al/SiC composite has been evaluated. Finally, it can be concluded that the Ni and Ni3P intermetallic phases produced via electroless coating improves the wettability between the SiC and molten aluminium leading to enhanced properties of the composite.
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Ryu, Ho J., Kyung H. Chung, Seung I. Cha, and Soon H. Hong. "Analysis of creep behavior of SiC/Al metal matrix composites based on a generalized shear-lag model." Journal of Materials Research 19, no. 12 (2004): 3633–40. http://dx.doi.org/10.1557/jmr.2004.0472.
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The creep behaviors of 20 vol% SiCw/2124Al, extruded with different ratios, and SiCp/2124Al, reinforced with 10–30 vol% SiC particles, were investigated to clarify the effects of aspect ratio, alignment, and volume fraction of reinforcement on creep deformation. The effective stresses on the matrix of SiC/Al composites are calculated based on the generalized shear-lag model. The minimum creep rates of SiCw/2124Al extruded with different ratios and SiCp/2124Al reinforced with different volume fractions of SiC particles are found to be similar under a same effective stress on matrix, which is calculated by the generalized shear-lag model. The subgrain sizes in matrices of crept SiC/Al composites are dependent on the effective stress on matrix but not on the applied stress on the composite. It is suggested that the role of SiC reinforcements is to increase the creep resistance of SiC/Al composite by reducing the effective stress on matrix.
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Han, Shao Hua, Roberto Rosa, Valentina Casalegno, et al. "Microwave Assisted Self-Propagating High-Temperature Synthesis for Joining SiC Ceramics and SiC/SiC Composites by Ni-Al System." Applied Mechanics and Materials 727-728 (January 2015): 213–18. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.213.
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Microwave has been applied to ignite the Self-propagating High-temperature Synthesis (SHS) of compacted Ni-Al mixtures, having 1:1 atomic ratio, in order to join Chemical Vapor Deposition (CVD) SiC ceramics and SiC/SiC composites. The average joint thickness of CVD SiC joint is about 200 μm and the Coefficient of Thermal Expansion (CTE) mismatch between CVD SiC and Ni-Al intermetallic compounds results in a interface bond strength inferior to that of the substrate and joining material; on the other hand, for the SiC/SiC composite joints, as a result of the porosity of SiC/SiC composites, the SHS products readily infiltrated into the pore spaces of the composite, leading to an increased porosity of the joint area and a better lower interface than the upper one. The mechanical strength of the joints has been evaluated by Single-Lap (SL) shear test at room temperature; neither of the ceramic joints nor the composites joint gave satisfactory results, but the ceramic joints reaching a maximum shear strength value of 56MPa exhibited a positive aspect for further experiments.
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Du, Shuang Ming, Chen Hu, Ming Jing Wang, and Wei Tao Zhao. "Study on Preparation Technique of SiC/Cu-Al Composite by Pressureless Infiltration." Advanced Materials Research 194-196 (February 2011): 1869–75. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.1869.
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In order to improve the compatibility between SiC particles and aluminum, the SiC/Cu composite powders were prepared by using chemical plating method to coat a Cu layer on the SiC particles surface. The obtained powders were made into preform and then put it into molten aluminium. SiC/Cu-Al composite were produced by using pressureless infiltration method under argon gas. By scanning electron microscopy (SEM), optical microscopy (OM), X-ray diffraction (XRD),the phase structure and microstructure of SiC/Cu composite powders and SiC/Cu-Al composite were analysed. Moreover, the temperature and soaking time on the effect of SiC/Cu-Al composite infiltration depth and effect were studied. The results show that: Cu coating on the SiC particles surface distributed uniformly; SiC/Cu-Al composite prepared at the condition of 800°C and 2 hours soaking time has a densification microstructure, SiC particles uniformly distributed in the aluminum matrix and there is no Al4C3 brittle phase formation; at 700°C～900°C infiltration, as the temperature growing, infiltration depth increases at first and then decreases; the microstructure of SiC/Cu-Al composite which infiltrated 2 hours is more compact than that 1 hour; Cu coating effectively improved the wettability between SiC particles and molten aluminum, and inhibited the formation of harmful interfacial reaction.
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Ding, Boxiong, J. L. Ding, Stephen D. Antolovich, and S. C. Cho. "Effect of Fabrication Processes on the Deformation and Fracture Behaviour of Sic/Al Composites." Advanced Composites Letters 11, no. 4 (2002): 096369350201100. http://dx.doi.org/10.1177/096369350201100403.
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The purpose of this research is to investigate the effects of microstructural parameters as a result of three different processing methods on the deformation and fracture properties of SiC/Al composites. The influences of heat treatment are also investigated. It was found that without heat treatment, the SiC reinforcement phase significantly improved the strength of the composite compared to the Al matrix material. However, the strengths of the heat-treated composites were roughly in the same range as those of heat-treated Al alloy. The ball-milled composite has higher strength, but lower fracture toughness compared to the powder and flake composites. Between the latter two, the powder composite has higher toughness.
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Suresh, P., and T. Poongodi. "Evaluation of surface roughness during turning of Al-SiC and Al-SiC-Gr composites." Multidiscipline Modeling in Materials and Structures 14, no. 5 (2018): 874–90. http://dx.doi.org/10.1108/mmms-11-2017-0138.
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Purpose In the current scenario, new materials are gaining popularity due to higher specific properties of strength and stiffness, increase in wear resistance, dimensional stability at higher temperature, etc. Subsequently, the need for precise machining has also been increased enormously. The purpose of this paper is to study the surface roughness during the turning of Al-10%SiC and Al-5%SiC-5%Gr composites under different cutting conditions. Design/methodology/approach Artificial neural network (ANN) has been effectively employed in solving problems with effortless computation in the areas such as fault diagnosis, process identification, property estimation, data smoothing and error filtering, product design and development, optimisation and estimation of activity coefficients. Response surface method is also used to analyse the problems involving a number of input parameters and their corresponding relationship between one or more measured dependent responses. Using Design Expert.8 evaluation software package, a simpler and more efficient statistical RSM model has been designed. RSM models are created by using 27 experimental data measurements obtained from different turning conditions of aluminium alloy composites. Findings In this work, the surface roughness during turning of Al-10%SiC and Al-5%SiC-5%Gr composites under different cutting conditions has been studied. The surface roughness value is proportional with the increase in feed rate and depth of cut while inversely proportional with the cutting speed. In all turning conditions, Al-10%SiC composite has lower surface roughness values than Al-5%SiC-5%Gr hybrid composite. An ANN and response surface models have been developed to predict the surface roughness of machined surface. The experimental results concur well with predicted models. Originality/value In the present trend, new materials are gaining popularity due to higher specific properties of strength and stiffness, increase in wear resistance, dimensional stability at higher temperature, etc. Subsequently, the need for precise machining has also been increased enormously. In this work, the surface roughness during turning of Al-10%SiC and Al-5%SiC-5%Gr composites under different cutting conditions has been studied.
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Wang, Yanju, Pengfei Wu, Xiaolei He, Wei Zhao, Xiang Lan, and Yanshan Lou. "Precise Modeling of Thermal and Strain Rate Effect on the Hardening Behavior of SiC/Al Composite." Materials 15, no. 6 (2022): 2000. http://dx.doi.org/10.3390/ma15062000.
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Temperature and strain rate have significant effects on the mechanical behavior of SiC/Al 2009 composites. This research aimed to precisely model the thermal and strain rate effect on the strain hardening behavior of SiC/Al composite using the artificial neural network (ANN). The mechanical behavior of SiC/Al 2009 composites in the temperature range of 298–623 K under the strain rate of 0.001–0.1 s−1 was investigated by a uniaxial tension experiment. Four conventional models were adopted to characterize the plastic flow behavior in relation to temperature, strain rate, and strain. The ANN model was also applied to characterize the flow behavior of the composite at different strain rates and temperatures. Experimental results showed that the plastic deformation behavior of SiC/Al 2009 composite possesses a coupling effect of strain, strain rate, and temperature. Comparing the prediction error of these models, all four conventional models could not provide satisfactory modeling of flow curves at different strain rates and temperatures. Compared to the four conventional models, the suggested ANN structure dramatically improved the prediction accuracy of the flow curves at different strain rates and temperatures by reducing the prediction error to a maximum of 4.0%. Therefore, the ANN model is recommended for precise modeling of the thermal and strain rate effect on the flow curves of SiC/Al composites.
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GUO, S., J. B. GAO, X. M. DU, et al. "WEAR PROPERTIES OF ALUMINUM MATRIX COMPOSITES REINFORCED BY GRAPHENE ENCAPSULATED SiC NANOPARTICLES." Digest Journal of Nanomaterials and Biostructures 16, no. 1 (2021): 249–59. http://dx.doi.org/10.15251/djnb.2021.161.249.
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Graphene encapsulated SiC nanoparticles reinforced aluminum matrix composites were prepared by high energy ball-milling and hot-press sintering methods. The effect of graphene content on microstructure and wear properties of composites was investigated. The results show that the graphene sheets successfully encapsulates SiC nanoparticles to form a composite reinforcement phase under the condition of the graphene content of 1 wt.%. SiC nanoparticles encapsulated with graphene predominantly are homogeneously distributed on the grain boundaries of Al matrix. The interface between graphene and Al matrix is sharpand no Al-C compound is formed on the interface. The increase of the reinforcement phase reduces the wear performance of the composite material. The main wear mechanisms of aluminum-based composite materials are the combination of delamination wear and abrasive wear. As the graphene content increases, the wear mechanism changes from abrasive wear to delamination wear.
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Chen, Zhiru, and Yukun Hu. "Research on the grinding performance of high pressure sintering SiCp/Al matrix composites." Engineering review 38, no. 2 (2018): 175–81. http://dx.doi.org/10.30765/er.38.2.5.
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The two-dimensional vertical grinding test equipment was used to grind SiCp/Al composites which were prepared by high pressure sintering method. The SEM observation of grinding morphology showed that grinding damage can be prevented by SiC particles reinforcement, 60% volume fraction of SiC particles of SiCp/Al composite can hinder grinding depth and grinding performance was improved with the sintering pressure and temperature increasing. In addition, some scratches and exfoliated pits of SiC particles were observed on the surface of 60% volume SiCp/Al composite as the increase of grinding grain, while the depth of these scratches was shallower, there was no large area exfoliated pits of SiC reinforcements.<br>
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Tailor, S., RM Mohanty, and PR Soni. "A Review on Plasma Sprayed Al-SiC Composite Coatings." Journal of Materials Science and Surface Engineering 1, no. 1 (2013): 15–22. http://dx.doi.org/10.52687/2348-8956/115.
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This review is done essentially to study results in the field of synthesis and characterization of SiC reinforced Al-SiC composite coatings using thermal spray process. SiC reinforced composite coatings produced by thermal spray process are being developed for a wide variety of applications, e.g. aerospace, automotive, structural and industrial. It is anticipated that, if properly deposited, Al-ceramic coatings could also provide improved properties like wear resistance and thermal barrier coatings. These results clearly demonstrate that the significant improvement in coating performance can be achieved by utilizing proper thermal spray conditions and SiC % in composite coatings. This paper presents a critical review on SiC reinforced Al-SiC composite coatings using thermal spray by various researchers in past years. The researcher’s findings with necessary parameters for achieve good Al-SiC composite coatings are given.
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Wang, Bin, Shengguan Qu, and Xiaoqiang Li. "Preparation and Anodizing of SiCp/Al Composites with Relatively High Fraction of SiCp." Scanning 2018 (2018): 1–13. http://dx.doi.org/10.1155/2018/8945729.
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By properly proportioned SiC particles with different sizes and using squeeze infiltration process, SiCp/Al composites with high volume fraction of SiC content (Vp = 60.0%, 61.2%, 63.5%, 67.4%, and 68.0%) were achieved for optical application. The flexural strength of the prepared SiCp/Al composites was higher than 483 MPa and the elastic modulus was increased from 174.2 to 206.2 GPa. With an increase in SiC volume fraction, the flexural strength and Poisson’s ratio decreased with the increase in elastic modulus. After the anodic oxidation treatment, an oxidation film with porous structure was prepared on the surface of the composite and the oxidation film was uniformly distributed. The anodic oxide growth rate of composite decreased with SiC content increased and linearly increased with anodizing time.
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Eskandari, Hossein. "Processing of Al/SiC/TiB2 Hybrid Nanostructured Composites by Underwater Shock Wave Consolidation." Advanced Materials Research 829 (November 2013): 157–62. http://dx.doi.org/10.4028/www.scientific.net/amr.829.157.
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Aluminum matrix hybrid nanostructured composites containing 30vol.%TiB2/SiC particles were manufactured by underwater shock consolidation method. Underwater shock consolidation is a one-stage densification process, which involves a very rapid and intense deposition of shock energy on powder particle surfaces. The interfacial microstructure and characterizations of this composite was performed using scanning electron microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results showed that the interface is clean and no reaction zone generated along the interface between SiC/TiB2particles and Al matrix. Transmission electron microscopy reveals the development of nanostructures in the Al matrix after shock wave consolidation. Density, hardness and bending strength of the composites compacts were measured. The hybrid composite samples showed better improvement in the bending strength regard to Al-30 vol. %TiB2and also Al-30 vol.%SiC composites.
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Parthasarathy, Adithya, L. Avinash, K. N. Varun Kumar, Basavaraj Sajjan, and S. Varun. "Fabrication and Characterization of Al-0.4%Si-0.5%Mg - SiCp Using Permanent Mould Casting Technique." Applied Mechanics and Materials 867 (July 2017): 34–40. http://dx.doi.org/10.4028/www.scientific.net/amm.867.34.
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Production of A6063/SiC composite with various weight fractions (3%, 6%, 9%) were prepared by using permanent mould casting was investigated. The preferred mean particle size of SiC is 60 μm. In addition, A6063 alloys were cast for comparison purposes. The alloys and composites were given a T6 heat treatment process (solution treatment at 520 °C, water quenching at room temperature and artificial ageing at 180 °C), Also Microstructure, hardness and tensile properties of these composites were evaluated and compared. In addition, tribological properties of these composites were evaluated using a Pin-on-Disc apparatus with various parameters (constant load of 10N and varying velocities as follows 0.5m/s, 1m/s, 1.5m/s, 2m/s) .The microstructure of the composites shows homogenous distribution of SiC particles in the Al matrix except in the A6063/9% SiC composite. The wear and mechanical properties of composites improve with increasing the weight fraction of SiC Wear morphology studies show that higher wear rate in case of unreinforced specimen compared to heat treated composites. Whereas with the increase in SiC content, the material tends to fail in brittle mode. The aim of present study is to evaluate the effect of heat treatment on the mechanical and tribological properties of aluminum alloy A6063 /SiC metal matrix composite.
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Nanda Kumar, Nю, and Natarajan Muthukumaran. "Experimental Investigation on Microstructural and Wear Behaviour of Dual Reinforced Particles (DRP) Aluminium Alloy Composites." Advanced Materials Research 1159 (September 2020): 42–53. http://dx.doi.org/10.4028/www.scientific.net/amr.1159.42.
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In the present scenario, the automobile industry, and aerospace industries are considerable scuffles to strive for innovative lightweight materials among manufacturing industries. They preserve their place by reducing the cost of their products and services. For this tenacity, the demand for lightweight material, low cost, and high-performance material are needed. Aluminum matrix composite is developed to fulfill and becomes an engineer’s material. Aerospace & Automobile industries are eager to introducing compound aluminum metal matrix composites due to their excellent mechanical & tribological properties which makes a reduction in the weight of the component. In this project the LM13 as the matrix material while SiC and B4C have been considered as dual reinforcement. Stir casting is the modest and inexpensive method of fabricating an aluminum matrix composite. For the Evaluation of Mechanical &Tribological behavior of DRP composite castings (LM13/B4C/SiC) selection for experimentation tests. In this paper different specimens of the MMC with LM13 Al Alloy 2wt% SiC and 2wt% B4C, 2wt% SiC and 4% B4C, 4wt% SiC, 2wt% B4C, 4wt% SiC and 4wt% B4C are taken for carried to invention out the increase in DRP in the composites will intensification the mechanical properties of the LM13 Al Alloy SiC and B4 C composite formed.
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Wang, K., JF Cheng, WJ Sun, and HS Xue. "An approach for increase of reinforcement content in particle rich zone of centrifugally cast SiCP/Al composites." Journal of Composite Materials 46, no. 9 (2011): 1021–27. http://dx.doi.org/10.1177/0021998311414070.
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A cylindrical ingot was produced by means of centrifugal casting using 20 vol.% SiCp/Al composite melt. The melt which was fabricated by double stir-casting method, consisting of three different sizes of SiC particles. SiCp/Al composites were characterized by optical microscope (OM), scanning electron microscope (SEM), transmission electron microscope (TEM), and X-ray diffraction (XRD) techniques. The results showed that SiC particles in the 20 vol.% SiCp/Al composite melt migrated towards the outer periphery of the cylindrical ingot under centrifugal force. High reinforcement content SiCp/Al composites were obtained in a zone near the outer periphery of the cylindrical ingot, and the volume fraction of SiC particles reached up to 55%. The thermal expansion test was performed, and the coefficient of thermal expansion (CTE) of the 55 vol.% SiCp/Al composites was found to be 9.9 × 10−6/°C, which was lower than the predicted value based on Kerner’s model and that of 60 vol.% SiCp/Al composites fabricated by conventional processing techniques. This article presented an approach for producing high reinforcement content SiCp/Al composites.
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Hu, Ming, Hai Ting Hu, Zheng Xiao Hong, Suk Bong Kang, and Kwang Jun Euh. "Microstructural Characterization of Sprayed Aluminum Matrix Composites Reinforced by SiC Particles." Materials Science Forum 546-549 (May 2007): 657–60. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.657.
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The microstructures of sprayed SiCp/Al composite fabricated by thermal spraying technique by optical microscope (OM)scanning electronic microscope (SEM), transmission electronic microscope (TEM), X-ray (diffractometer) XRD, selected area electron diffraction (SAED), energy dispersive spectrum (EDS) techniques, were investigated. The composite consisted of SiC and Al, along with single crystal Si and amorphorous Si, and tiny Al2O3. The interfaces between SiC particles and Al matrix bonded well, and tiny reactants like Al2O3 were found near the interfaces. The mechanisms of chemical reactions during sprayin were discussed g. The nano-Al grains and particles were observed in the sprayed composite. The formation of nano-Al grains and particles of SiCp/ Al composites were explained. It has been found that Several interface relationships existed in the sprayed composite.
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Wei, Hong Mei, Hong Yu Xu, Lin Geng, and Yu Dong Huang. "Formation of SiC-Al Interface in SiC Whisker Reinforced Al Composite." Advanced Materials Research 306-307 (August 2011): 857–60. http://dx.doi.org/10.4028/www.scientific.net/amr.306-307.857.
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Crystallization behavior of melt aluminum on the surfaces of SiC whisker (SiCw) was analyzed based on the consideration to obtain the SiC-Al interfaces with the lowest energy in SiCw/Al composite. The interfacial structure was investigated to determine whether a specific orientation relationship exists between SiC and Al. Analysis results indicate that four kinds of orientation relationships possibly exist between SiC and Al when only the <110> crystal direction of the aluminum is considered as the firstly formed crystal direction along the concave joint line of <110> of the SiC whisker. Interfacial atom match bonding models were set up in theory and one kind of crystal orientation relationship has been proved by our previous experimental result.
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Wang, Shuang Xi, Gao Shan Liu, Jian Yu Yan, and Jia Xing Ye. "Study of Al/SiC Package Substrate for High Power LED." Key Engineering Materials 602-603 (March 2014): 285–89. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.285.
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LED is the fourth generation of the illumination light source. The light efficiency, lifetime and reliability will be reduced, if the heat generated in LED chips couldn’t be dissipated rapidly. Thus, thermal conductivity of the substrate material is a very key factor in the LED field. Silicon Carbide with Aluminum metal composites (Al/SiC) has high thermal conductivity and ideal thermal expansion coefficient. In this paper, the main kinds of substrates for high-power LED were introduced. Al/SiC composite substrate with excellent heat conduct performance was fabricated by pressureless infiltration technology. The microstructure of Al/SiC was observed by scanning electron microscope (SEM). The coefficients of thermal expansion and thermal conductivity of Al/SiC composite substrate, AlN ceramic substrate and Al2O3ceramic substrate were compared. The results showed that the coefficient of thermal expansion (CTE) of Al/SiC varied from 7.77×10-6K-1to 10.89×10-6K-1, which is compatible with Silicon. And the thermal conductivity of Al/SiC is as 9 times high as that of Al2O3.
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Anaee, Rana Afif. "Effect of tempering on thermal analysis of Al-Ti-Si alloy and its composites." Iraqi Journal of Physics (IJP) 14, no. 31 (2019): 89–98. http://dx.doi.org/10.30723/ijp.v14i31.175.
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The investigation of the effect of tempering on thermal analysis ofAl-Ti-Si alloy and its composites with MgO and SiC particles wasperformed. Thermal analysis was performed before and aftertempering by DSC scan. Optical microscopy was used to identify thephases and precipitations that may be formed in base alloy andcomposites. X-ray diffraction test indicated that the Al3Ti is the mainphase in Al-Ti-Si alloy in addition to form Al5Ti7Si12 phase. Somechemical reactions can be occurred between reinforcements andmatrix such as MgO.Al2O3 in Al-Ti/MgO, and Al4C3 and Al(OH)3 inAl-Ti/SiC composite. X-ray florescence technique is used toinvestigate the chemical composition of the fabricated specimens.Heat treatment (Tempering) changes the microstructure of base alloyand its composites which was assessed by DSC scan. Generally,three main peaks appeared in DSC represented by GP zone, S phase(precipitations) and dissolution of phases or precipitations. Aftertempering, composite with SiC particles showed better results thanbase alloy and composite with MgO. Since the optical microscopyrevealed reforming the stable phase Al3Ti with evaporation somegases from composite. DSC analysis showed the stability ofcomposite with SiC was up to 270oC.
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Sekhar, Chandra. "Investigations on Mechanical Properties of Al-4.5% Cu-SiC and Al-4.5%Cu-Graphite Composites." European Journal of Engineering and Technology Research 1, no. 1 (2018): 30–33. http://dx.doi.org/10.24018/ejeng.2016.1.1.123.
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This paper deals with the investigation of mechanical properties by introducing micro size SiC particulates and Graphite particulates into Al-4.5%Cu alloy matrix. SiC and Graphite particle reinforced Al alloy metal matrix composites were prepared by stir casting method. Al-Cu alloy was taken as the base matrix to which SiC and Graphite particulates were used as reinforcements. 6 wt. % of SiC and Graphite particulates were added to the base matrix to fabricate Al-4.5Cu – 6 wt. % SiC and Al-4.5%Cu – 6 wt. % Graphite composites. For each composite, the reinforcement particles were pre-heated to a temperature of 600oC and then dispersed in steps of two into the vortex of molten Al-Cu alloy to improve wettability and distribution. The Micostructural study was done by using optical microscope, which revealed the uniform distribution of SiC and Graphite particles in matrix alloy. Mechanical properties like hardness, tensile and impact strength were evaluated as per ASTM standards. Hardness and tensile strength increased with addition of 6 wt. % of SiC particulates in the base matrix Al-Cu alloy compared to Al-Cu-6wt. % Graphite composites.
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Rizkyardiani, Sigma, and Bondan Tiara Sofyan. "Characteristics of Heat Treated Al7Si-Mg-Zn - 5 wt.% SiC Squeeze Casted Composite with Variation of Mg Content for Tactical Vehicle Application." Advanced Materials Research 789 (September 2013): 198–203. http://dx.doi.org/10.4028/www.scientific.net/amr.789.198.
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Composite as main materials for ballistic applications has been developed in order to reduce density which leads to lower fuel consumption and faster mobilization. Composite is required to own high hardness and high impact strength for good ballistic performance. Particulate composites Al-7Si-Mg-Zn reinforced by SiC is designed for ballistic applications due to its light weight and high hardness. Whilst the high hardness showed brittle properties, heat treatment process is applied to this composite to reduce it. This research aims to study the effect of magnesium as alloying element to composite Al-7Si-Mg-Zn reinforced by SiC particulate which applied to precipitation hardening. Composites Al-7Si-Zn-SiC with 2, 4 and 6 wt. % Mg is solution treated at 500 oC for 1 hour, followed by ageing at 200 oC. The characterization was carried out by hardness testing, microstructure observations, SEM and EDX observations, impact testing and fractographic observations. Results showed that Mg does not affect hardness of composite by precipitation hardening. Composite with 2, 4, 6 wt. % Mg had 63.83, 62.27, 62.48 HRB on its peak hardness. Mg did not become precipitate in matrix Al-7Si-Mg-Zn because of its low diffusivity in aluminium. Mg worked as wetting agent that reduces interface tension between aluminium matrix and SiC particles in order for composite to own better interface bonding. Therefore impact testing showed significant increase of impact strength with the increase of Mg content. Composite with 2, 4, 6 wt. % Mg had 2075, 3006, 3257 J/mm2 impact strength respectively
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Patel, Murlidhar, Bhupendra Pardhi, Manoj Pal, and Mukesh Kumar Singh. "SiC Particulate Reinforced Aluminium Metal Matrix Composite." Advanced Journal of Graduate Research 5, no. 1 (2018): 8–15. http://dx.doi.org/10.21467/ajgr.5.1.8-15.
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Al or Al alloy Metal Matrix Composites have wide range of applications i.e. aerospace, automobile etc. due to its lightweight, high tensile strength, high wear resistance. This review paper characterized the SiC particulate reinforced Al Metal Matrix Composites. The SiC particulates are dispersed in Al or Al alloy by liquid state processing route and solid-state processing route. Stir casting liquid processing route has been followed by no. of researchers due to its simplicity and low processing cost and at the time of reinforcement small amount of Mg is added to increase the wettability of SiC in molten Al or Al alloy. When Al or Al alloy reinforced with SiC, then its mechanical and tribological properties are enhanced. The effect of particle size, weight or volume fraction of the SiC on density, porosity, hardness, impact toughness, tensile strength, ductility, sliding wear resistance, slurry erosion resistance, erosion-corrosion resistance, corrosion resistance and fatigue strength of Al or Al alloy MMCs are reported. The effect of extrusion and machinability of the SiC particulate reinforced Al MMCs are also discussed in this review article.
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Lin, Yung Jen, and Xiao Wen Lo. "Fabrication of SiC and SiC/ Aluminum-Silicon Composites from Rattan Charcoal." Key Engineering Materials 479 (April 2011): 119–23. http://dx.doi.org/10.4028/www.scientific.net/kem.479.119.
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Bio-structured carbon was obtained by carbonization of rattan in Ar. Then, the charcoal was reacted with Si at 1500 °C to form SiC. It was also reacted with Si and 2024 aluminum alloy at 1400°C for various times to form composites. The results showed that the SiC was beta phase and had the structure of rattan. SiC whiskers were also found on the inner surfaces of the pore channels (vessels) of rattan structure. The bulk density of the porous SiC was 1.5 g/cm3 and its open porosity was 44%. On the other hand, the charcoal embedded in Si powder and 2024 alloy was converted into SiC/aluminum-silicon composite after heat treatment. The charcoal was reacted to form SiC first. Then, Al-Si alloy infiltrated into the pores of the porous SiC to form composites. When the alloy composition was Al-20 at% Si, the composite obtained after 5 hours of reaction had bulk density of 2.3 g/cm3, open porosity of 19%, compressive strength of 316 MPa and bending strength of 138 MPa.
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Wang, Bin, Shengguan Qu, and Xiaoqiang Li. "Effect of the Different High Volume Fraction of SiC Particles on the Junction of Bismuthate Glass-SiCp/Al Composite." Scanning 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/7394040.
Full textAbstract:
The in-house developed bismuthate glass and the SiCp/Al composites with different volume fractions of SiC particles (namely, 60 vol.%, 65 vol.%, 70 vol.%, and 75 vol.%) were jointed by vacuum hot-pressing process. The novel material can be used for the space mirror. The SiCp is an abbreviation for SiC particle. Firstly, the SiCp/Al composites with different vol.% of SiC particle were manufactured by using infiltration process. In order to obtain a stable bonding interface, the preoxide layers were fabricated on the surfaces of these composites for reacting with the bismuthate glass. The coefficient of thermal expansion (CTE) was carried out for characterizing the difference between the composites and bismuthate glass. The sealing quality of the composites and the bismuthate glass was quantified by using shear strength testing. The optical microstructures showed the particles were uniformly distributed in the Al matrix. The SEM image shows that a smooth oxidation layer was generated on the SiCp/Al composite. The CTE testing result indicated that the higher the vol.% of the particles in the composite, the lower the CTE value. The shear strength testing result disclosed that SiCp/Al composite with relatively low CTE value was favorable to obtain a bonding interface with high strength.
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Anasyida, A. S., Norani Abdul Manaf, B. K. Dhindaw, and Mahani Yusoff. "Material Characterization of Al-Si/SiCpp Composite via Pressureless Infiltration Using Polystyrene as External Binder." Advanced Materials Research 626 (December 2012): 948–52. http://dx.doi.org/10.4028/www.scientific.net/amr.626.948.
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In this study, SiC-reinforced Al-Si matrix composite was prepared by pressureless infiltration using polystyrene as a binder. The molten Al-Si alloy was infiltrated into preform that previously pre-mixed with different volume percentage (0, 10, 20, 30 and 40 vol%) of SiCpand polystyrene. The result showed that the infiltration of Al-Si/SiC composite was possible using polystyrene beads as a binder. The distribution of SiC particles was uniformly distributed within the Al-Si matrix. At lower SiC content, as a result of Si deficiency, Al4C3was favorable to be formed. The presence of Al4C3demonstrated poor properties of Al-Si/SiC composite. But, the hardness and density was improved with increasing SiC content.
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Firouz, Fatma, Atef Daoud, and Malak Abou El-Khair. "AlSi-SiC Composites for Automotive Brake Rotor." Key Engineering Materials 835 (March 2020): 178–85. http://dx.doi.org/10.4028/www.scientific.net/kem.835.178.
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This manuscript investigates the Fabrication and Microstructure of Automotive Brake Rotor Made of AlSi-SiC Composites. This work is oriented toward fabrication of automotive brake rotors from Al-9Si and Al-12Si reinforced with 10 and 20% SiC particles using stir-casting method. The brake rotors were subjected to heat treatment. Aging behavior showed that hardness increased with the addition of SiC reinforcements by 104%, comparing to solution treatment condition. Also, the addition of SiC particles accelerates formation of precipitates. Microstructure of brake rotors made of composite revealed uniform distribution of SiC particles, primary phase (⍺-Al) and modified eutectic Si. EDX analysis showed the presence of Al, Mg and O at the interface between matrix and SiC particles.
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Umanath, K., S. T. Selvamani, K. Palanikumar, and Ram G. Dinesh. "Worn Surface Analysis of Hybrid Metal Matrix Composite." Advanced Materials Research 984-985 (July 2014): 546–50. http://dx.doi.org/10.4028/www.scientific.net/amr.984-985.546.
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Metal to the metal wear analysis of Aluminium (Al6061grade) alloy, dis-continuously reinforced with ceramic particles of SiC and Al2O3deliver this paper. The Al matrix with 5 to 25% of vol. Fractions of SiC and Al2O3particulate reinforcements were formed in Hybrid Metal Matrix Composite (HMMC) by stirring casting technology. They are finding applications in automotive, aeronautical and sport goods. For the proper use of these composites, its mechanical properties and wear properties are to be evaluated. The dry sliding behavior of these SiC and Al2O3particulates HMMCs and that of Al alloy at atmosphere was analyzed with a pin on disc type wear testing machine. The result indicates that, the scanning electron micrographs of the worn surfaces of the hybrid composites show the worn surface of the composite alloy is rougher than the unreinforced Al6061alloy.
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Khethier Abbass, Muna, and Noor Alhuda Baheer Sharhan. "Characteristics of Al6061-SiC-Al2O3 Surface Hybrid Composites Fabricated by Friction Stir Processing." Journal of Materials and Engineering 1, no. 4 (2023): 147–58. http://dx.doi.org/10.61552/jme.2023.04.002.
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Friction stir processing (FSP) has successfully evolved as an alternative technique of fabricating metal matrix composites. (MMC). FSP has been used positively to produce surface composite that offer good surface properties such as higher hardness and wear resistance, also help in the development of finer-grain structure during thermomechanical processing of the material. This work aims to fabricate a surface composite upon the AA6061-T6 Al alloy via FSP. The effect of SiC and/or Al2O3 particles on microstructure, microhardness, and wear behavior of the surface composite was investigated. Many drilled holes were made to incorporate the ceramic particles within the matrix at the optimal friction stir processing circumstances, The optimal parameters of (FSP) were (32 mm ̸min), (1250 rpm), and (2) passes in a similar track.. It was obtained that the maximum microhardness being in the stir zone center of FSP of the base alloy and all composites. The results of XRD and EDX mapping confirmed the incorporation of SiC and Al2O3 particles within the surface of Al alloy using FSP which will improve the surface properties. The improvement in microhardness was (89.3%) in the case of FSP composite sample reinforced with hybrid addition (SiC+Al2O3) particles in comparison to FSP unreinforced base alloy (75 HV). It was showed that the wear resistance of the FSP composite sample reinforced with hybrid addition of (Al2O3 and SiC ) particles was slightly better than that of the FSP composite sample reinforced with single Al2O3 or SiC particles and base Al alloy.
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Lee, Jae Hong, Kyun Tak Kim, and Yeong Sik Kim. "Wear Behavior of Al/SiC Composite Coatings According to Sliding Speed and Applied Load." Applied Mechanics and Materials 152-154 (January 2012): 216–19. http://dx.doi.org/10.4028/www.scientific.net/amm.152-154.216.
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Thermal spray technology allows providing wear-resistant coating on the surface of mechanical components. In this study, wear characteristics of thermally sprayed Al/SiC composite coatings were evaluated. These Al/SiC composite coatings reinforced with SiC particles were fabricated on Al 6061 substrate by thermal spray process. Dry sliding wear tests were performed using the varied sliding speeds and applied loads. Wear behavior of these Al/SiC composite coatings were investigated using scanning electron microscope(SEM), energy dispersive X-ray spectroscopy(EDX) and X-ray diffraction(XRD).
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Kumar, Deepak, Pardeep Saini, and Pradeep Kumar Singh. "A study on Morphological and Mechanical Characterization of Al-4032/SiC/GP Hybrid Composites." Metallurgical and Materials Engineering 28, no. 1 (2022): 33–45. http://dx.doi.org/10.30544/728.
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The pattern of metal matrix composites can be enhanced by integrating the concept of hybrid metal matrix composite to produce newer engineering materials with improved properties. The morphological and mechanical characteristics of Al-4032/SiC/GP hybrid composites have been investigated. The aluminium alloy (Al-4032) based hybrid composites have been fabricated through the bottom pouring stir casting set up, by reinforcing the silicon carbide (SiC) and granite powder ceramic particles as the reinforcement material at various fraction levels i.e. 0, 3, 6, 9 weight% in equal proportion. The reinforcement particle size is up to 54μm. The microstructural characterization of the hybrid composite samples has been carried out using an optical microscope, SEM, and XRD. The study reveals that the reinforcement hybrid particles (SiC + GP) are almost uniformly distributed throughout the matrix phase. The mechanical properties (tensile strength, impact strength, and microhardness) of the hybrid composite samples have been obtained and found to be better than the unreinforced alloy.
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Wozniak, J., M. Kostecki, K. Broniszewski, W. Bochniak, and A. Olszyna. "Influence of Mixing Parameters on Homogeneity of Al/Sic Composites/ Wpływ Parametrów Mieszania Na Jednorodność Kompozytów Al/Sic." Archives of Metallurgy and Materials 59, no. 4 (2014): 1493–98. http://dx.doi.org/10.2478/amm-2014-0254.
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Abstract The main aim of this work was to study the effect of time and method of Al, SiC powders mixing on the microstructure and mechanical properties of composites. Moreover, the influence of applicating direct extrusion with a reversibly rotating die on the homogeneity of the composites was examined. Microstructure observations with the use of an optical microscope and scanning electron microscope were applied. A quantitative analysis of composite microstructure was conducted. The density (helium pycnometer method), Vickers hardness and the Young’s Modulus of the composites were also determined. The results show that the homogeneity of Al/SiC composites rises with an increase of mixing time. However, better results were obtained by application of high energy ball milling process.
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Fathy, Adel, Dalia Ibrahim, Omayma Elkady, and Mohammed Hassan. "Evaluation of mechanical properties of 1050-Al reinforced with SiC particles via accumulative roll bonding process." Journal of Composite Materials 53, no. 2 (2018): 209–18. http://dx.doi.org/10.1177/0021998318781462.
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Accumulative roll bonding was successfully used as a severe plastic deformation method to produce Al–SiC composite sheets. The effect of the addition of SiC particles on the microstructural evolution and mechanical properties of the composites during accumulative roll bonding was studied. The Al–1, 2 and 4 vol.% SiC composite sheets were produced by accumulative roll bonding at room temperature. Monolithic Al sheets were also produced by the accumulative roll bonding process to compare with the composite samples. Field emission scanning electron microscopy revealed that the particles had a random and uniform distribution in the matrix by the last accumulative roll bonding cycles, and strong mechanical bonding takes place at the interface of the particle matrix. This microstructural evolution led to improvement in the hardness, strength and elongation during the accumulative roll bonding process. It is also shown that by increasing the volume fraction of particles up to 4 vol.% SiC, the yield and tensile strengths of the composite sheets increased more than 1.2 and 1.3 times the accumulative roll-bonded aluminum sheets, respectively. Field emission scanning electron microscopy observation of fractured surface showed that the failure broken of composite was shear ductile rupture.
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Aperador, Willian, Jonnathan Aperador, and Giovany Orozco-Hernández. "Comparative Analysis of the Corrosion and Mechanical Behavior of an Al-SiC Composite and AA 2024 Alloy Fabricated by Powder Metallurgy for Aeronautical Applications." Metals 14, no. 12 (2024): 1462. https://doi.org/10.3390/met14121462.
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This study presents a comparative analysis of the corrosion and mechanical properties of an Al-SiC composite and an AA 2024 aluminum alloy, focusing on their suitability for aeronautical applications. The Al-SiC composite was fabricated using advanced powder metallurgy techniques, incorporating a 20% volume of silicon carbide (SiC) particles, averaging 1.6 µm in size, to enhance its structural and electrochemical performance. Electrochemical evaluations in an aerated 3.5% NaCl solution revealed a significant improvement in the corrosion resistance of the Al-SiC composite. This enhancement is attributed to the cathodic nature of the SiC particles, which promote the formation of a protective aluminum oxide layer, reducing pitting corrosion and preserving the material’s structural integrity. In terms of the mechanical properties, the Al-SiC composite demonstrated a higher yield strength and ultimate tensile strength compared to the AA 2024 alloy. While it exhibited a slightly lower elongation at failure, the composite maintained a favorable balance between strength and ductility. Additionally, the composite showed a higher Young’s modulus indicating improved resistance to deformation under load. These findings underscore the potential of the Al-SiC composite for demanding aerospace applications, offering valuable insights into the development of materials capable of withstanding extreme operational environments.
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Liao, Shu De, and Sen Kai Lu. "Numerical Simulations of Uniaxial Compression Properties of SiC/6061 Aluminum Alloy Co–Continuous Composites." Advanced Materials Research 652-654 (January 2013): 139–42. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.139.
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The uniaxial deformation properties of a SiC/6061 Al alloy co–continuous composites (CCCs) where both phases are continuous have been studied using the Solidwork Simulation software applied the finite element method (FEM). The simulated results have shown that the composites are relatively anisotropy, 6061 Al alloy matrix and SiC network ceramic exhibit different mechanical behaviour. The ultimate stress is found near the interface of composites. The configuration of SiC has relatively great influence on intensity and distribution of stress in the composite. The material behaves in a nearly bilinear manner defined by the Young’s modulus and an elastic-plastic modulus. The large deformation appears inside 6061 Al alloy matrix. The 6061 Al alloy matrix and SiC can restrict each other to prevent from producing the strain under the load.
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Leszczyńska-Madej, B., A. Wąsik, and M. Madej. "Microstructure Characterization of SiC Reinforced Aluminium and Al4Cu Alloy Matrix Composites." Archives of Metallurgy and Materials 62, no. 2 (2017): 747–55. http://dx.doi.org/10.1515/amm-2017-0112.
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AbstractA conventional powder metallurgy method (PM) was used to produce Al-SiC and Al4Cu alloy matrix composites with 2.5, 5, 7.5 and 10 wt% of SiC particles. Two different sizes of the reinforcing phase particles were applied to determine their effect on composite microstructure. The sintering process was carried out at 600°C under nitrogen atmosphere, and its consequence was the appearance of aluminium nitrides in composite microstructure acting as an additional strengthening phase. The composites were next re-pressed and re-sintered (2p2s) under the same conditions. The main aim of this article was to examine the microstructure of the SiC reinforced Al and Al4Cu alloy matrix composites. To achieve this goal and characterize the sintered materials, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD) techniques were used.
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Moazami Goudarzi, Mohammad, and Farshad Akhlaghi. "Fabrication of Al/SiC Nanocomposite Powders via In Situ Powder Metallurgy Method." Advanced Materials Research 295-297 (July 2011): 1347–52. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.1347.
Full textAbstract:
In the present investigation, the in-situ powder metallurgy (IPM) method was utilized to synthesis aluminum alloy matrix composite powders containing SiC nanoparticles. Specified amounts of SiC particles (with a size in the range of 250-600 µm) together with SiC nanoparticles (average size of 60 nm) were preheated and added to aluminum melt. This mixture was stirred via an impeller at a certain temperature for a predetermined time. The kinetic energy of the impeller was transferred to the melt via the non-wetting SiC particles and resulted in melt disintegration. The liquid droplets created by this process were then solidified upon cooling the blend resulting in a mixture of Al powders and SiC particles. This blend was passed through a 250 µm sized sieve and a mixture of Al powders and SiC nanoparticles was produced which could be subsequently used as a feedstock for preparation of Al-SiC nano-composites via the standard powder metallurgy methods. The results confirmed that the surface condition (oxidized vs. as-received), amount and different proportions of the added nano-sized and micron sized SiC particles as well as the chemistry of the metallic charge (CP aluminum or Al-1wt.%Mg) affect the size distribution and yield of the resultant sub-250 µm sized powders. The scanning electron microscopy (SEM) studies revealed that Al/SiC composite powders containing nano-sized SiC particles could be produced by using Al-1 wt.% Mg as the matrix alloy.
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Seshappa, Angadi, chalicheemala Sreedhar, Bhavanasi Subbaratnam, Konka Prudhvi Raj, Divya Boya, and Rajeev Sobti. "Investigation of Al-7075/Al2O3/SiC by swirl casting and WEDM." MATEC Web of Conferences 392 (2024): 01024. http://dx.doi.org/10.1051/matecconf/202439201024.
Full textAbstract:
The research, engineering, military, automotive, sports, and telecommunications industries are just a few of the many that make heavy use of aluminium metal matrix composites. The unique synergistic qualities of these composites, such as reduced weight density, improved performance, and thermal conductivity, make them highly desired. Because of its reputation for small but noticeable structural improvements, Al-7075 aluminium has seen extensive use in the aerospace industry. This research followed international criteria for evaluating specimens in terms of positional stiffness, deformation, impact resistance, and wear. It used the stir casting process to add SiC/Al2O3 to Al-7075 in percentages ranging from 2% to 8%. Hybrid Al-HMCs are the product of an aluminium metal matrix composite that was able to include 8% SiC/Al2O3via the stirring process. Because it combined aluminium oxide with silicon carbide, this Al-HMC showed improved mechanical qualities and stiffness. Aluminium metal composites with increasing amounts of Al2O3/ SiC showed reduced fatigue and frictional strengths. The effect on hardness remained small even when the MMC's SiC/Al2O3 proportions grew significantly. To further investigate the Wire Electrical Discharge Machining (WEDM) process, researchers used the L9 Arrays Design of Experiments (DOE) technique to incorporate new process variables. Our objective was to enhance the rate of material removal from Al-7075/SiC/Al2O3 while simultaneously improving the marginal surface roughness. Finding the best WEDM process parameters, including the ideal percentages of SiC/Al2O3, to achieve the desired surface roughness while minimising material removal rate was the goal of this investigation. To produce Al- 7075/SiC/Al2O3 composite materials with varying additive percentages in a production environment, this study will determine the best and most accurate WEDM process variables to use.
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Eesley, Gary L., Alaa Elmoursi, and Nilesh Patel. "Thermal properties of kinetic spray Al–SiC metal-matrix composite." Journal of Materials Research 18, no. 4 (2003): 855–60. http://dx.doi.org/10.1557/jmr.2003.0117.
Full textAbstract:
Kinetic spray deposition provides a new means for producing composite materials with tailored physical properties. We report on measurements of the thermal conductivity and thermal-expansion coefficient for several compositional variations of kinetically sprayed Al–SiC metal-matrix composites. As a result of the deposition process, inclusion of SiC particles saturates in the 30–40% volume fraction range.