Journal articles: 'Particulate composite'

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Suraya, Sulaiman, Shamsuddin Sulaiman, Ali Munira, and Abdul Aziz Fazilah. "Effect of TiC Particulates on the Microstructure and Mechanical Properties of Aluminium-Based Metal Matrix Composite." Advanced Materials Research 903 (February 2014): 145–50. http://dx.doi.org/10.4028/www.scientific.net/amr.903.145.

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In this research, metal-matrix composites (MMCs) of aluminium-11.8% silicon alloy matrix reinforced with titanium carbides particulates were fabricated by the casting technique. Aluminium-11.8% silicon alloy is selected as the matrix material and titanium carbide as particulates are mixed in different weight percentages, 5%, 10%, 15% and 20%wt. The cylinder composite castings are made by pouring the composite mixture in copper permanent-molds. The microstructure and mechanical properties of these composite materials were investigated. The effects of reinforced materials on weight percentages addition of particulate on the particulate distribution in aluminium-11.8% silicon alloy composites and SEM observation of the fracture surfaces of tensile tested specimens were deliberate. Moreover, cylinder castings without particulate addition are made and compared with the result based on the properties and microstructural features. It is found that the microstructure and mechanical properties of composites significantly improved by the use of particle reinforced into aluminium alloy.

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Guo, Su Juan, Guo Zheng Kang, and Cheng Dong. "Numerical Simulations for Uniaxial Ratcheting of SiC_P/6061Al Composites Concerning Particulate Arrangement." Advanced Materials Research 26-28 (October 2007): 317–20. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.317.

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Based on three dimensional cubic unit cell models containing several particulates with certain particulate arrangements, the monotonic tensile and uniaxial ratcheting behaviors of particulate reinforced metal matrix composites (i.e., T6-treated SiCP/6061Al composites) were numerically simulated by using elastic-plastic finite element code ABAQUS with help of newly developed user material subroutine (UMAT). In the simulations, the effects of different particulate arrangements inside the unit cell models on the monotonic tensile and ratcheting behaviors of the composites were discussed. It is shown that the effect of particulate arrangement on the ratcheting of the composite depends on the arranged modes and the number of particulates contained in the model, and the interaction between particulates can be represented reasonably by the cubic unit cell model with a suitable distribution of multi-particulates.

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Patel, Murlidhar, Sushanta Kumar Sahu, and Mukesh Kumar Singh. "Fabrication and Investigation of Mechanical Properties of SiC Particulate Reinforced AA5052 Metal Matrix Composite." Journal of Modern Materials 7, no. 1 (July 6, 2020): 26–36. http://dx.doi.org/10.21467/jmm.7.1.26-36.

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In this present research particulate reinforced aluminium metal matrix composites are developed by using sand mould and liquid stir casting processing route in which AA5052 reinforced with 5 wt. % SiC particulates of 63µm particle size. The density, porosity, micro-hardness, and compressive strength of SiC particulate reinforced AA5052 MMC were investigated and compared these properties with similar properties of unreinforced AA5052. The microstructure of the developed composite was also analysed by using optical microscopy, SEM, and XRD. Developed particulate reinforced Al metal matrix composite gives improved hardness and compressive strength as compared to the unreinforced AA5052. The addition of 5 wt. % SiC particulates increases the density of AA5052.

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Ramraji, K., K. Rajkumar, and P. Sabarinathan. "Tailoring of tensile and dynamic thermomechanical properties of interleaved chemical-treated fine almond shell particulate flax fiber stacked vinyl ester polymeric composites." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 233, no. 11 (May 9, 2019): 2311–22. http://dx.doi.org/10.1177/1464420719849616.

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Natural fiber and particulates are being exploited to attain eco-friendly products for construction and automotive sectors. These sectors are moving towards the use of high damping characteristic natural biofibers and particulate-reinforced polymer composite as part of the structural components. In this work, woven flax fiber (0° and 90°) and almond shell particulates were used. They were subsequently treated with alkaline and acetylene chemical solution separately. Polymer composite laminates were prepared using a vinyl ester resin as matrix and by stacking flax fibers and almond particulates interleaved in an alternative sequence using the hand layup technique. This was followed by hydraulic pressing. Composite laminates were fabricated by varying the almond shell particulate weight fraction of 0%, 5%, 10%, and 15%. Mechanical properties such as tensile and flexural strength were experimentally measured. Dynamic thermomechanical analysis was conducted on the alkaline-treated and untreated composites with different frequencies for the assessment of the damping characteristics. The alkaline-treated interleaved almond shell and flax fiber composite showed considerably higher damping characteristics. This could be due to the improved adhesion between the matrix and reinforcements. An addition of almond shell particulate positively increased the strength and stiffness of composites.

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Jamaludin, Shamsul Baharin, Josef Hadipramana, Mohd Fitri Mohd Wahid, Kamarudin Hussin, and Azmi Rahmat. "Microstructure and Interface Analysis of Glass Particulate Reinforced Aluminum Matrix Composite." Advanced Materials Research 795 (September 2013): 578–81. http://dx.doi.org/10.4028/www.scientific.net/amr.795.578.

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A characterization of microstructure and interface was made on the composites Al-4 % Cu reinforced with 15 wt. % glass particulate. The composite was fabricated by powder metallurgy followed by solution treatment and artificial ageing. The microstructures of the composite showed that the glass particulates were in-homogenously distributed in the matrix and segregated near copper. The aluminum oxide layer was found between aluminum, copper and glass particulate. Micro cracks were observed in the aluminum oxide layer and at the interface between aluminum oxide layer and aluminum. Hardness increased as ageing time increased. Interface behavior and aging time influenced the hardness of the composite.

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Edacherian, Abhilash, Ali Algahtani, and Vineet Tirth. "Investigations of the Tribological Performance of A390 Alloy Hybrid Aluminum Matrix Composite." Materials 11, no. 12 (December 12, 2018): 2524. http://dx.doi.org/10.3390/ma11122524.

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Several challenges stand in the way of the production of metal matrix composites (MMCs) such as higher processing temperatures, particulate mixing, particulate–matrix interface bonding issues, and the ability to process into desired geometrical shapes. Although there are many studies showing composites with single particulate reinforcements, studies on composites with multiple reinforcing agents (hybrid composites) are found to be limited. Development of a hybrid particulate composite with optimized mechanical and tribological properties is very significant to suit modern engineering applications. In this study, Al–Si hypereutectic alloy (A390) was used as the matrix and silicon carbide (SiC), graphite (Gr), and molybdenum di-sulphide (MoS2) were used as particulates. Particulate volume (wt %) was varied and sample test castings were made using a squeeze casting process through a stir casting processing route. The evaluation of the mechanical testing indicates that the presence of both the hard phase (SiC) and the soft phase had distinct effect on the properties of the hybrid aluminum matrix composites (HAMCs). Composite samples were characterized to understand the performance and to meet the tribological applications. The 3D profilometry of the fractured surfaces revealed poor ductility and scanning electron microscopy fractography study indicated an intra-granular brittle fracture for HAMCs. Also, the dry sliding wear tests indicated that the newly developed HAMCs had better tribological performance compared to that of A390 alloy.

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Epaarachchi, Jayantha Ananda, and Matthew T. Reushle. "Performance of Aluminium / Vinylester Particulate Composite." Materials Science Forum 654-656 (June 2010): 2656–59. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.2656.

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The performances of aluminum /vinylester particulate-composites were studied in detail in order to investigate its suitability for engineering applications. This study examined the suitability of atomised aluminum particles for particulate reinforcement of a vinyl ester resin. Mechanical properties were obtained for the composite by testing various percentages of aluminium powder (75-150 m) and vinylester resin. It has been found that the inclusion of Al powder has not significantly changed the properties of vinylester resin, however an improvement in the ductility of the composite has been recorded. The optimal performances of the composite were exhibited by 15% Al composition. The properties of the particulate composites were modeled using numerous empirical models. Unfortunately a significant difference was found between some of the experimental and predicted properties of the Al/vinylester particulate composite. This paper intends to detail the variation of mechanical properties with the change of Al volume fraction in the composite and the performances of empirical models in prediction of the properties of particulate composites.

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Wada, Shuichi, Mamoru Mabuchi, Kenji Higashi, and Terence G. Langdon. "A quantitative analysis of cavitation in Al–Cu–Mg metal matrix composites exhibiting high strain rate superplasticity." Journal of Materials Research 11, no. 7 (July 1996): 1755–64. http://dx.doi.org/10.1557/jmr.1996.0220.

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Specimens of two Al–Cu–Mg (2124) composites, reinforced with 20 vol% of either Si3N4 particulates or Si3N4 whiskers, were tested under experimental conditions close to those for optimum high strain rate superplasticity. Both composites developed extensive internal cavitation during testing, but quantitative measurements show that significant cavity growth occurs throughout the test in the whisker-reinforced composite, but only at strains ≥1.0 in the particulate-reinforced composite. This difference in behavior is attributed to differences in the extent of a discontinuous liquid phase at the grain boundaries and at the matrix/reinforcement interfaces. It is concluded that the presence of an extensive liquid phase in the particulate-reinforced composite is beneficial for attaining high ductility because it relieves the stress concentrations from grain boundary sliding and thereby limits the growth of cavities.

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Abd Latif, Mohd Abrar, Mohd Edeerozey Abd Manaf, Muhammad Izzat Syahmi Firdaus, Loganarrth Maslamany, and Rose Farahiyan Munawar. "Effects of Particulate Types on Biomass Particulate Filled Kenaf/Polypropylene Composite." Key Engineering Materials 694 (May 2016): 23–28. http://dx.doi.org/10.4028/www.scientific.net/kem.694.23.

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The application of natural fibers in composite is very encouraging because of its many benefits such as more environmental friendly and cost reduction. Recently, there is an interest on the application of kenaf-based material for high-end uses such as in automotive industry. In this research, mechanical properties of kenaf fiber reinforced polypropylene (KFRP) composite added with two different types of bio-based fillers, i.e., oil palm shell particle (OPSP) and rubber seed shell particle (RSSP) are studied. The composites were prepared by melt mixing of the materials using internal mixer, followed by compression molding process using hot press machine. The tensile and flexural strength were found to increase with the addition of OPSP as well as RSSP. However, KFRP composite added with RSSP showed better tensile, flexural and impact properties as compared to the composite added with OPSP. From microscopic observation of the raw OPSP and RSSP particles, it was observed that OPSP showed a more granular shape, while RSSP particles were flakier in shape. This difference in particle shape is believed to affect the mechanical properties of the composites as demonstrated in this study.

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Jordan, J. L., J. E. Spowart, M. J. Kendall, B. Woodworth, and C. R. Siviour. "Mechanics of particulate composites with glassy polymer binders in compression." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, no. 2015 (May 13, 2014): 20130215. http://dx.doi.org/10.1098/rsta.2013.0215.

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Whether used as structural components in design or matrix materials for composites, the mechanical properties of polymers are increasingly important. The compressive response of extruded polymethyl methacrylate (PMMA) rod with aligned polymer chains and Al–Ni–PMMA particulate composites are investigated across a range of strain rates and temperatures. The particulate composites were prepared using an injection-moulding technique resulting in highly anisotropic microstructures. The mechanics of these materials are discussed in the light of theories of deformation for glassy polymers. The experimental data from this study are compared with PMMA results from the literature as well as epoxy-based composites with identical particulates. The PMMA exhibited the expected strain rate and temperature dependence and brittle failure was observed at the highest strain rates and lowest temperatures. The Al–Ni–PMMA composites were found to have similar stress–strain response to the PMMA with reduced strain softening after yield. Increasing volume fraction of particulates in the composite resulted in decreased strength.

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Roy, S., and G. S. Upadhyaya. "Sintering of Astroloy-Y2O3 particulate composites." Science of Sintering 34, no. 1 (2002): 13–21. http://dx.doi.org/10.2298/sos0201013r.

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The present paper describes the preparation and properties of Astroloy-Y2O3 (up to 8 vol%) sintered composites. A dilatometric study of green composites carried out in argon up to 1325?C, revealed that maximum shrinkage occurs in a 6 vol% Y2O3 composite, while the lowest shrinkage was noted in an 8 vol% composite. It is observed that the greater the volume fraction of Y2O3, the higher is the onset of temperature for the beginning of the shrinkage process. A post sintering hot forging operation serves very well as an alternative to repressing-resintering. Mechanical properties have better values for 6 vol% Y2O3 composite as compared to other composites.

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Herda, Ellyza, Nabila ., and Bambang Irawan. "SHEAR BOND STRENGTH OF RESTORATIVE PARTICULATE RESIN COMPOSITE WITH A SHORT FIBER-REINFORCED RESIN COMPOSITE SUBSTRUCTURE." International Journal of Applied Pharmaceutics 9 (January 1, 2018): 155. http://dx.doi.org/10.22159/ijap.2017.v9s2.42.

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Objective: This study aimed to identify the shear bond strength of two different restorative particulate resin composites with a short fiber-reinforced resin composite (SFRC) substructure.Methods: Two restorative particulate resin composites, G-aenial PosteriorTM (Group A, 10 specimens) and Tetric N-Ceramtm (Group B, 10 specimens), were used as an upper layer of everX posteriorTM, an SFRC. A shear bond strength test was performed using a universal testing machine with a load of 100 kgf and a crosshead speed of 0.5 mm/min. The data were analyzed statistically using the independent samples t-test.Results: The mean shear bond strength values were found to be18.64±1.5 MPa (Group A) and 22.05±1.8 MPa (Group B). A significant difference in shear bond strength between the two groups was found.Conclusion: The shear bond strength value is higher in the Tetric N-CeramTM restorative particulate resin composite with SFRC as a substructure than the G-aenial PosteriorTM restorative particulate resin composite.

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Pan, Yu-bai, Jian-hui Qiu, Makoto Kawagoe, Mikio Morita, Shou-hong Tan, and Dong-liang Jiang. "SiC–AlN Particulate Composite." Journal of the European Ceramic Society 19, no. 9 (July 1999): 1789–93. http://dx.doi.org/10.1016/s0955-2219(98)00280-5.

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Sayuti, Mohd, Shamsuddin Sulaiman, B. T. Hang Tuah Baharudin, Mohd Khairol A. Arifin, T. R. Vijayaram, and S. Suraya. "Effect of Quartz-Silicon Dioxide Particulate on Tensile Properties of Aluminium Alloy Cast Composites." Key Engineering Materials 471-472 (February 2011): 727–32. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.727.

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This paper describes an experimental investigation of the tensile properties of quartz-silicon dioxide particulate reinforced LM6 aluminium alloy composite. In this experimental, quartz-silicon dioxide particulate reinforced LM6 composite were fabricated by carbon dioxide sand moulding process with variation of the particulate content on percentage of weight. Tensile tests were conducted to determine tensile strength and modulus of elasticity followed by fracture surface analysis using scanning electron microscope to characterize the morphological aspects of the test samples after tensile testing. The results show that the tensile strength of the composites decreased with increasing of quartz particulate content. In addition, this research article is well featured by the particulate-matrix bonding and interface studies which have been conducted to understand the processed composite materials mechanical behaviour. It was well supported by the fractographs taken using the scanning electron microscope (SEM). The composition of SiO2 particulate in composite was increased as shown in EDX Spectrum and Fractograph.

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Kuwahara, Akira, Shinya Suzuki, and Masaru Miyayama. "High-Power Charge/Discharge Properties of LiFePO₄/Carbon Composites with Various Carbon Materials." Key Engineering Materials 388 (September 2008): 45–48. http://dx.doi.org/10.4028/www.scientific.net/kem.388.45.

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Electrochemical properties of LiFePO4/carbon composites with various carbon materials were investigated to achieve high-rate charge and discharge properties. LiFePO4/carbon composites were synthesized by a pyrolysis of a LiFePO4 precursor solution added with porous graphite or particulate carbon powders. The LiFePO4/porous-graphite composite had a microstructure in which LiFePO4 particles existed on carbon surface and within pores. The LiFePO4/particulate-carbon composite had a microstructure in which each carbon particle was covered with LiFePO4 fine particles. The LiFePO4/porous-graphite and the LiFePO4/particulate-carbon composite electrodes showed high discharge capacities of 69 and 30 mAh g-1 at a high current density of 4000 mA g-1. The high electronic conductivity in the LiFePO4/porous-graphite composite contributed to achieving the large discharge capacity at the high current density.

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Naik, Prajapati, Samir K. Acharya, Prasanta Sahoo, and Smitirupa Pradhan. "Abrasive wear behaviour of orange peel (biowaste) particulate reinforced polymer composites." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 235, no. 10 (February 4, 2021): 2099–109. http://dx.doi.org/10.1177/1350650121991412.

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The development of lightweight materials has drawn more attention in the last decade in the field of household, construction and automobile sectors in place of conventional materials. New environmental policies are forcing researchers to design and develop new lightweight materials that are environmentally friendly. The development of bio-composites in place of synthetic fibre composites is one of the solutions for this. This article deals with an experimental investigation of tribological properties of orange peel particulate (a biowaste) epoxy composites. The hand layup technique is used to fabricate the composite material by varying the filler loading from 0 to 30% with a variation of 10%. The abrasive wear behaviour of the fabricated composite was analysed by using a pin-on-disc set up under dry sliding conditions with varying loads at different sliding velocities. Based on the experiments, it is observed that the wear behaviour of neat epoxy material has enhanced significantly with the addition of the orange peel particulates as filler materials. The characterisation of orange peel particulates was done using energy-dispersive X-ray spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy. The surface morphology study of the worn surface with respect to wear mechanism indicates plastic deformation and development of cracks at optimum filler concentration (20 wt%). With a higher filler concentration (30 wt%), brittle failure of the composite was noticed.

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D., Vivekanandan, Sakthivel M., Srinivasa Moorthy S., and Ajith Arul Daniel S. "Fabrication and characterization of TiO2 particulate filled agave Americana fiber-reinforced polyester resin composites." Pigment & Resin Technology 48, no. 6 (November 4, 2019): 533–39. http://dx.doi.org/10.1108/prt-08-2018-0079.

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Purpose In this study, TiO2 is used to enhance the mechanical properties of the composite material containing agave Americana fiber and polyester resin. Design/methodology/approach Agave Americana fiber was first treated with 5% of NaOH, and the composition of treated and untreated fiber was kept constant, whereas the particulate and resin were alternatively used. The handlay method is used to fabricate the composite plates. The morphology of the composites was studied using scanning electron microscopy (SEM). Findings The composite was composed of 30% treated agave Americana, 10% of TiO2 particulates and 60% of a polyester resin for better and enhanced mechanical properties. Practical implications The composite can be used for aero-structural components, automobile components and other areas where light-weight components are required. Originality/value A new type of agave Americana fiber with TiO2 and polyester resin composite was fabricated and investigated.

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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 (September 10, 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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Kallio, Timo T., Arzu Tezvergil-Mutluay, Lippo V. J. Lassila, and Pekka K. Vallittu. "The Effect of Surface Roughness on Repair Bond Strength of Light-Curing Composite Resin to Polymer Composite Substrate." Open Dentistry Journal 7, no. 1 (September 30, 2013): 126–31. http://dx.doi.org/10.2174/1874210601307010126.

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Objective: The purpose of this study was to analyze the shear bond strength of a new composite resin to polymer-based composite substrates using various surface roughnesses and two kinds of polymer matrices. Materials and methods: Particulate filler composite resin with cross-linked polymer matrix and fiber-reinforced composite with semi-interpenetrating polymer matrix were used as bonding substrates after being ground to different roughnesses. Substrates were aged in water for one week before bonding to new resin composites. Twelve specimens in the substrate groups were ground with grinding papers of four grits; 320, 800, 1200 and 2400. Results: Corresponding values of surface roughness (Ra) varied from 0.09 to 0.40 for the particulate filler composite resin and 0.07 to 0.96 for the fiber-reinforced composite resin. Characteristic shear bond strength between the new resin and particulate filler composite resin was highest (27.8 MPa) with the roughest surface (Weibull modulus: 2.085). Fiber-reinforced composite showed the highest bond strength (20.8 MPa) with the smoothest surface (Weibull modulus: 4.713). Conclusions: We concluded that surface roughness did not increase the bonding of new resin to the substrate of IPN based fiber-reinforced composite, whereas the roughness contributed to bonding the new resin to the particulate filler composite resin with a cross-linked polymer matrix.

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Li, Hui, Yi Tan Zhang, Kei Ameyama, Hai Jun Yang, Zhi Guo Liu, and Chao Li Ma. "Meso-Structure Design of B₄C-Al/Al Composites by Hot Pressing." Materials Science Forum 849 (March 2016): 801–6. http://dx.doi.org/10.4028/www.scientific.net/msf.849.801.

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According to the theory of meso-structure design, milling powders were blended with un-milled Al particulate to increase ductility. Two kinds of Al particulate-toughened composites were fabricated by using powder metallurgy method, where the mass fraction of B4C in the B4C-Al agglomerate particles was 40%, but 32% and 16% in the whole composite. The microstructure of composites was examined by scanning electron microscope (SEM), and its mechanical properties were studied. The results indicate that Al particulate-toughened sample has a slight plasticity with bulks of aluminum alloy in the composite. But meso-structure design has no effect on improvement on the plasticity and toughness of the sample B4C-Al/Al (16%)(3#), where the mass fraction of B4C in the whole composite is 16%. In the present study, the strengthening and deformation mechanism of the composites were also discussed.

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Babalola, Saheed Adeoye, Kenneth Kanayo Alaneme, Samuel Ranti Oke, Lesley Heath Chown, Nthabiseng Beauty Maledi, and Michael Oluwatosin Bodunrin. "Hot compression behaviour and microstructural evolution in aluminium based composites: an assessment of the role of reinforcements and deformation parameters." Manufacturing Review 8 (2021): 6. http://dx.doi.org/10.1051/mfreview/2021004.

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The response of two different types of aluminium matrix composites (AMCs) reinforced with silicon carbide ceramic particulates or nickel metallic particulates to hot compression testing parameters was evaluated. The composites were produced via two-step stir-casting technique. Axisymmetric compression testing was performed on the samples at different deformation temperatures of 220 and 370 °Ϲ, 0.5 and 5 s−1 strain rates and total strains of 0.6 and 1.2. The initial and post-deformed microstructures were studied using optical and scanning electron microscopy. The results show that flow stress was significantly influenced by imposed deformation parameters and the type of reinforcements used in the AMCs. Nickel particulate reinforced aluminium matrix composite (AMC) showed superior resistance to deformation in comparison with silicon carbide reinforced AMC under the different testing conditions. In both AMCs, work hardening, dynamic recovery and dynamic recrystallisation influenced their response to imposed parameters. The signature of dynamic recrystallisation was very apparent in aluminium matrix composite reinforced with nickel particulates.

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Náhlík, Luboš, Bohuslav Máša, and Pavel Hutař. "Numerical Modeling of Macroscopic Behavior of Particulate Composite with Crosslinked Polymer Matrix." Key Engineering Materials 465 (January 2011): 129–32. http://dx.doi.org/10.4028/www.scientific.net/kem.465.129.

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Particulate composites with crosslinked polymer matrix and solid fillers are one of important classes of materials such as construction materials, high-performance engineering materials, sealants, protective organic coatings, dental materials, or solid explosives. The main focus of a present paper is an estimation of the macroscopic Young’s modulus and stress-strain behavior of a particulate composite with polymer matrix. The particulate composite with a crosslinked polymer matrix in a rubbery state filled by an alumina-based mineral filler is investigated by means of the finite element method. A hyperelastic material behavior of the matrix was modeled by the Mooney-Rivlin material model. Numerical models on the base of unit cell were developed. The numerical results obtained were compared with experimental stress-strain curve and value of initial Young’s modulus. The paper can contribute to a better understanding of the behavior and failure of particulate composites with a crosslinked polymer matrix.

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Majer, Zdeněk, and Luboš Náhlík. "Influence of Interphase Imperfection on Micro-Crack Behavior in Polymer Composites Filled by Rigid Particles." Key Engineering Materials 586 (September 2013): 194–97. http://dx.doi.org/10.4028/www.scientific.net/kem.586.194.

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In this paper a particulate composites with polypropylene matrix and rigid mineral fillers are studied. The polymer particulate composites are frequently used in many engineering applications. Due to the physical and chemical interaction between matrix and particles a third phase (generally called interphase) is formed. The composite is modeled as a three-phase continuum. The properties of particles and interphase have a significant effect on the global behavior of the composite. On the basis of fracture mechanics methodology the interaction of micro-crack propagation in the matrix filled by rigid particles covered by the very soft interphase is analyzed. The effect of the composite structure on their mechanical properties is studied here from the theoretical point of view. The properties of particles and matrix were determined experimentally. Conclusions of this paper can contribute to a better understanding of the behavior of micro-crack in polymer particulate composites with respect to interphase.

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Máša, Bohuslav, Luboš Náhlík, and Pavel Hutař. "Numerical Modelling of Particulate Composite with a Hyperelastic Matrix." Key Engineering Materials 525-526 (November 2012): 25–28. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.25.

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The main aim of the paper is an estimation of the macroscopic mechanical properties of particulate composites using numerical methods. Matrix of the considered composite was cross-linked polymethyl methacrylate - PMMA in a rubbery state, which exhibits hyperelastic behaviour. The three parameter Mooney Rivlin material model, which is based on the strain energy density function, was chosen for description of the matrix behaviour. Alumina based particles (Al2O3) were used as a filler. Numerical modelling based on the finite element method (FEM) was performed to determine stress-strain curve of the considered particulate composite. Representative volume element (RVE) model was chosen for FE analyses as a modelling approach of a composite microstructure. Various geometry arrangements of particles and various directions of loading have been considered and composite anisotropy has been investigated. A good agreement between numerical calculations with damage model and experimental data has been found and the described method may have a great potential for numerical modelling of composite behaviour and design of new particulate composite materials.

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Náhlík, Luboš, Zdeněk Majer, Kateřina Štegnerová, and Pavel Hutař. "Lifetime Assessment of Particulate Ceramic Composite with Residual Stresses." Key Engineering Materials 754 (September 2017): 107–10. http://dx.doi.org/10.4028/www.scientific.net/kem.754.107.

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A micro-crack propagation in particulate ceramic based composite was studied using finite element method (FEM). Subcritical crack growth (SCG) was numerically simulated under complex load conditions (mechanical loading and loading by internal residual stresses). The effect of residual stresses on the crack propagation was studied. Two-dimensional computational model of particulate ceramic composite with material properties corresponding to low temperature co-fired ceramics (LTCC) was developed. The results indicate that the presence of residual stresses significantly reduces values of stress intensity factor in the vicinity of composite surface and the direction of residual stresses around the particles contributes to the micro-crack deflection from the particles. The time to failure of the composite under mechanical loading was determined. Results obtained contribute to a better understanding of the role of residual stresses during micro-crack propagation in ceramic particulate composites.

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Tao, Chenglin, Xi Liang, Xiaoxue Bi, Zeliang Liu, and Huijian Li. "Mechanical Properties of Cemented Particulate Composite: A 3D Micromechanical Model." Materials 14, no. 14 (July 12, 2021): 3875. http://dx.doi.org/10.3390/ma14143875.

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Cemented particulate composite is a kind of composite material with high strength, high energy absorption, and multifunctional characteristics, which is widely used in engineering practice. The calculation of the mechanical properties of granular composites based on theoretical methods has always been a topic of discussion. A micromechanical model with a three-dimensional rigid beam-spring network (3D-RBSN) is proposed here. The stiffness matrix of the model was calculated theoretically. The model was applied to the analysis of the mechanical properties of composites material with glass beads and epoxy resin. The results indicate that the 3D-RBSN model can effectively predict the mechanical properties of composite materials, such as Young’s modulus and Poisson’s ratio. Furthermore, the damage evolution process of cemented particulate composite with initial defects was analyzed based on the 3D-RBSN model.

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Wang, Ziyang, Yunhai Ma, Li Guo, and Jin Tong. "Influence of polyphenyl ester and nanosized copper filler on the tribological properties of carbon fibre–reinforced ultra-high-molecular-weight polyethylene composites." Journal of Thermoplastic Composite Materials 31, no. 11 (November 1, 2017): 1483–96. http://dx.doi.org/10.1177/0892705717738299.

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Ultra-high-molecular-weight polyethylene (UHMWPE) reinforced with carbon fibre (CF) and filled with polyphenyl ester (POB) and nanosized copper (Cu) fillers was prepared by compression moulding. The tribological behaviours and the synergism of the incorporation of fibre and particulates were studied. The proportions of the reinforcement material ranged from 5 wt% to 25 wt%, the filler material of POB varied from 5 wt% to 25 wt% and the nanosized filler was from 4 wt% to 12 wt%. In the sample with CF only, the lowest wear rate was observed for the UHMWPE + 15% CF composite. The particulate filler further reduced the composite wear rate, and the lowest wear rate was found for the hybrid with CF, POB and nanosize Cu particles, that is, for the UHMWPE + 15% CF + 15% POB + 12% Cu composite. The particulate filler was added, and the coefficient of friction slightly increased. The transfer film formed on the metal counterface was studied using optical microscopy, and the topography of the transfer film was investigated using atomic force microscopy. Results showed that the transfer films were thin, compact and uniform on the metal counterfaces of the UHMWPE + 15% CF + 15% POB + 12% Cu composite. Worn surface morphologies of composites were studied using scanning electron microscopy. Results showed that the worn surface of the UHMWPE + 15% CF + 15% POB + 12% Cu composite was smoother and had better wear resistance than that of other composites.

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Emura, Satoshi, and Masuo Hagiwara. "Effect of Heat Treatment on the Creep Properties of Ti-22Al-27Nb/TiB Composite." Key Engineering Materials 345-346 (August 2007): 545–48. http://dx.doi.org/10.4028/www.scientific.net/kem.345-346.545.

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A TiB particulate-reinforced Ti-22Al-27Nb (mol%) alloy, based on the orthorhombic intermetallic phase, was prepared using gas atomization powder metallurgy method. In the as-atomized condition, extremely fine TiB particulates of less than 1-μm diameter and 5-μm length were dispersed in the matrix. After annealing heat treatment (heat treated at 1423 K with subsequent furnace cooling), this composite exhibited a lamellar matrix microstructure and showed better creep properties than a composite produced using conventional ingot metallurgy method, with coarse TiB particulates of 5-μm diameter and 40-μm length. Coarsening of the matrix microstructure and growth of TiB particulates occurred after annealing heat treatment at higher temperature (ca. 1473 K). Creep-resistance improvement was also observed, which seemed to be mainly attribute to the effect of the matrix microstructure. From measurements of stress components and activation energy, all composites showed an identical creep mechanism: dislocation-controlled creep.

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Ku, H., Mohan Trada, and V. C. Puttgunta. "Mechanical Properties of Vinyl Ester Composites Cured by Microwave Irradiation: Pilot Study." Key Engineering Materials 334-335 (March 2007): 537–40. http://dx.doi.org/10.4028/www.scientific.net/kem.334-335.537.

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Composite components made from vinyl ester resins by Centre of Excellence in Engineered Fiber Composites (CEEFC), University of Southern Queensland (USQ) suffer considerable shrinkage during hardening. Currently, CEEFC solves the shrinkage problem by breaking a large composite component into smaller composite parts because smaller parts tend to have less shrinkage. These smaller parts are then joined together to form the overall structure. The shrinkage of vinyl ester particulate composites has been reduced by curing the resins under microwave conditions. The reduction in the shrinkage of the resins by microwaves will enable the manufacture of large vinyl ester composite items possible. This project investigates the difference in impact strength, tensile strength and Young’s modulus of 33 percent by weight of fly-ash particulate reinforced vinyl ester composite, VE/FLY-ASH (33%) cured under microwave and ambient conditions. Drop weight impact tests were used to find out the impact strength of the composite, while tensile tests were used to find out the tensile strength and Young’s modulus of the composite. The power levels of microwaves used were 180 and 360 W; the duration of exposure of the composite samples to microwave irradiation varied from 20 to 50 seconds. The difference in impact strength and Young’s modulus between microwave cured vinyl ester particulate composites and those cured under ambient conditions had been found to be minimal. However, the tensile strength of the composite samples cured under microwave conditions can be higher than those cured under ambient conditions.

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Majer, Zdeněk, Pavel Hutař, and Zdeněk Knésl. "Crack Behaviour in Polymeric Composites: The Influence of Particle Shape." Key Engineering Materials 465 (January 2011): 564–67. http://dx.doi.org/10.4028/www.scientific.net/kem.465.564.

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In this paper polymeric particulate composites are studied (especially polypropylene (PP) matrix stuffed by rigid mineral fillers). Presently, polymeric particulate composites are frequently used in many engineering applications. The composite was modeled as a three-phase continuum – matrix, interphase and particle. The properties of the particles (size, shape) have a significant effect on the global behaviour of the composite. On the basis of fracture mechanics methodology the interaction of micro-crack propagation in the matrix filled by rigid particles covered by the interphase was analyzed. The effect of the composite structure on their mechanical properties is studied here from the theoretical point of view.

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Yaro, Aliyu, Laminu Kuburi, and Musa Abiodun Moshood. "Influence of Kaolin particulate and Luffa cylindrica fiber on the mechanical properties polyester matrix." International Journal of Advanced Manufacturing Technology 116, no. 1-2 (June 13, 2021): 139–44. http://dx.doi.org/10.1007/s00170-021-07442-3.

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AbstractPolymeric materials are used in different industrial applications because they retain good environmental properties, low-cost, and easy to produce compared to conventional materials. This study investigated the effect of adding Kaolin particulate (KFP) and Luffa cylindrica fiber (LCF) on the mechanical properties of polyester resin. Luffa cylindrica fiber was treated with 5% NaOH, varied in weight fraction (5, 10, and 15%wt), and was used to reinforce unsaturated polyester resin using the hand lay-up method, whereas, for the hybrid composite, Kaolin particulates were kept constant at 6wt% fraction while the fibers varied as in the mono-reinforced composite. The samples were machined for mechanical analysis. Analysis of the result revealed that the reinforcement has enhanced greatly the mechanical properties of polyester composites.

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Chen, Dong, Cong Zou, Yi Jie Zhang, Nai Heng Ma, and Hao Wei Wang. "Tensile Properties of 15wt. %TiB₂/7055 Composite Fabricated by In Situ Method." Advanced Materials Research 842 (November 2013): 165–69. http://dx.doi.org/10.4028/www.scientific.net/amr.842.165.

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7055 aluminum alloy reinforced with 15wt. % TiB2 particulates was synthesized by in situ method, the microstructure and tensile properties were investigated. There are a few particulate clusters in the matrix. The elastic modulus and hardness of the composite are higher than that of the matrix alloy, but the yield strength and ultimate tensile strength decrease. The decrease of strength is attributed to the presence of TiB2 particulate cluster and residual reaction slag.

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Zheng, Jun Jun, Tungwai Leo Ngai, Chang Xu Hu, G. R. Pan, and Yuan Yuan Li. "Effect of Ti₃SiC₂ Content on the Property of a Warm Compacted Cu-Ti₃SiC₂ Composite." Materials Science Forum 628-629 (August 2009): 471–76. http://dx.doi.org/10.4028/www.scientific.net/msf.628-629.471.

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A simple and economical powder metallurgy forming process known as warm compaction was employed to fabricate a Cu-Ti3SiC2 particulate reinforced copper matrix composite for electro-friction purpose. Copper matrix composites reinforced with 5, 10, 15 mass% Cu coated Ti3SiC2 particulate were prepared by compacting the powder mixture with a pressure of 700 MPa at 145°C, and then sintered at 1000°C under cracked ammonia atmosphere for 60 minutes. Their density, hardness, tensile strength, elongation and electrical resistivity were studied. Result showed that within a reasonable limit, the addition of Ti3SiC2 particulate can increase the hardness of the composite without losing much of electrical conductivity. Sintered composite with 5 mass% Ti3SiC2 has an ultimate tensile strength of 182 MPa with an elongation of 10%, a hardness of HB 68 and a resistivity of 8.0×10-8Ωm. Compared with the samples using uncoated Ti3SiC2 particulate, the resistivity of the samples prepared by using the Cu coated Ti3SiC2 particulate have a better conductivity, but have a slightly lower mechanical property.

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Pan, Fu Sheng, Wen Ming Wang, Yun Lu, and Su Min Zeng. "The Influence of Interfacial and Structural Parameters on the Elastic Modulus of SiCp/6066Al Composites." Materials Science Forum 546-549 (May 2007): 653–56. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.653.

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The effects of the interfacial parameters (interface/matrix modulus ratio, interface Poisson ratio and interface volume fraction) and the structural parameters (particulate volume fraction, particulate shape, arrangement pattern and dimensional variance mode) on the elastic modulus of SiCp/6066Al composites were calculated and analyzed. The results showed that component and interface performance significantly influenced the elastic modulus of the composite; but the particulate shape, arrangement pattern and dimensional variance mode were found to have little influence. This means that the effect of the above structural parameters can be negligible. The optimal approach to enhance the elastic modulus and specific elongation of a composite is to improve the interfacial bonding of the particulate. Optimal results are obtained when the interface modulus is 20% ~ 30% of the matrix modulus.

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Pędzich, Zbigniew. "Fracture of Oxide Matrix Composites with Different Phase Arrangement." Key Engineering Materials 409 (March 2009): 244–51. http://dx.doi.org/10.4028/www.scientific.net/kem.409.244.

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The paper presents the analysis of the fracture path in composites with the alumina or zirconia matrix containing inclusions of another oxide or tungsten carbide. The description concerns the fracture of composite systems with 10 vol.% of inclusions (particulate composites), other three-systems with 33 vol.% of inclusions of each phase and the two phase composite with the equal phase content (50 : 50 vol.%). The different phase proportion and diversified content of inclusions cause significant differences in the microstructure of composites. The main difference between particulate composites and composites with continuous phases depends on a possibility of occurrence of toughening mechanisms connected with crack – inclusions interactions. In connection with a different interphase boundary strength, this phenomenon leads to significant differences in the way of composite fracture. The presented results of mechanical properties of composites were analyzed in the aspect of their way of fracture.

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Majer, Zdeněk. "Load Influence on the Behavior of Micro-Crack in the Particulate Composite." Key Engineering Materials 525-526 (November 2012): 173–76. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.173.

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Particulate composite with soft polymer matrix and rigid mineral fillers are one of most frequently used construction and engineering materials. The main focus of a present paper is an estimation of the load influence on behavior of micro-crack placed in close proximity to the particle with interphase in soft matrix. The particulate composite with polymer matrix filled by magnesium-based mineral fillers is investigated by means of the finite element method. A non-linear material behavior of the matrix was considered. Numerical model on the base of representative plane element (RPE) was developed. The conclusions of this paper can contribute to a better understanding of the behavior of micro-crack in particulate composites with soft polymer matrix.

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Sayuti, Muhammad, Shamsuddin Sulaiman, B. T. Hang Tuah Baharudin, M. K. A. M. Arifin, Thoguluva Raghavan Vijayaram, and S. Suraya. "Effect of Mould Vibration on Mechanical Properties of Particulate Reinforced Aluminium Alloy Matrix Composite." Advanced Materials Research 445 (January 2012): 475–80. http://dx.doi.org/10.4028/www.scientific.net/amr.445.475.

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This paper focuses on the mechanical properties of Titanium Carbide (TiC) particulate reinforced aluminium-silicon alloy matrix composite subjected to mould vibration during solidification. In this experimental study, mould vibration is applied to TiC particulate reinforced LM6 alloy matrix composites with a wide range of frequencies. TiC particulate reinforced LM6 alloy matrix composites are fabricated by adding different particulate weight fraction of TiC in the matrix by carbon dioxide molding process. Mechanical properties such as tensile strength, hardness, are determined and microstructural features are analyzed through SEM. Besides, fracture surface analysis has been performed to characterize the morphological aspects of the test samples after tensile testing. Preliminary works show that the mechanical properties have been improved with 10.2Hz frequency when compared with the gravity sand-castings without vibration.

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Tian, Jing Lai, Fang Xia Ye, Li Sheng Zhong, and Yun Hua Xu. "Microstructure and Wear Properties of In Situ Production of (Fe,Cr)₇C₃ Particulate Bundles Reinforced Iron Matrix Composites." Advanced Materials Research 652-654 (January 2013): 64–68. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.64.

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In-situ production of (Fe,Cr)7C3 particulate bundles-reinforced iron matrix composites were prepared by infiltration casting between Cr wires and white cast iron at 1200°C plus subsequent heat treatment. The composites prepared under different heat treatment time were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), macrohardness test and pin-on-disc wear resistance test. The results show that the composite is mainly consist of (Fe,Cr)7C3 carbides and γ-Fe. The area of the particulate bundles gradually increases with the increase of heat treatment time, the microstructure evolved from eutectic to hypoeutectic, and the morphologies of the reinforcements present chrysanthemum-shaped, granular and intercrystalline eutectics, respectively. The (Fe,Cr)7C3 particulate bundles reinforced composite has high macrohardness and excellent wear resistance under dry sliding wear testing conditons.

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Majer, Zdeněk, and Luboš Náhlík. "Micro-Crack Propagation in Particulate Composite with Different Types of Matrix." Applied Mechanics and Materials 245 (December 2012): 138–43. http://dx.doi.org/10.4028/www.scientific.net/amm.245.138.

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Particulate composites with polymer matrix and solid fillers are one of important types of materials. Generally, these materials are usually used as construction materials, high-performance engineering materials or protective organic coatings. The main aim of a present paper is an estimation of the micro-crack behavior in the particulate composite with non-linear polymer matrix. The polymer matrix filled by magnesia-based mineral filler is investigated by means of the finite element method. A non-linear material behavior of the matrix was obtained from experiment as well as properties of mineral filler. Numerical model on the base of representative plane element (RPE) was developed. The results show that the presence of interphase between particle and matrix can improve fracture toughness of polymer particle composite through debonding process. The conclusions of this paper can contribute to a better understanding of the behavior of micro-crack in particulate composites with respect to interphase.

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Burke, M. G., M. N. Gungor, and P. K. Liaw. "TEM examination of 2014-SiC metal matrix composite." Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 726–27. http://dx.doi.org/10.1017/s0424820100105692.

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Aluminum-based metal matrix composites offer unique combinations of high specific strength and high stiffness. The improvement in strength and stiffness is related to the particulate reinforcement and the particular matrix alloy chosen. In this way, the metal matrix composite can be tailored for specific materials applications. The microstructural characterization of metal matrix composites is thus important in the development of these materials. In this study, the structure of a p/m 2014-SiC particulate metal matrix composite has been examined after extrusion and tensile deformation.Thin-foil specimens of the 2014-20 vol.% SiCp metal matrix composite were prepared by dimpling to approximately 35 μm prior to ion-milling using a Gatan Dual Ion Mill equipped with a cold stage. These samples were then examined in a Philips 400T TEM/STEM operated at 120 kV. Two material conditions were evaluated: after extrusion (80:1); and after tensile deformation at 250°C.

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Tohgo, Keiichiro, and G. J. Weng. "A Progressive Damage Mechanics in Particle-Reinforced Metal-Matrix Composites Under High Triaxial Tension." Journal of Engineering Materials and Technology 116, no. 3 (July 1, 1994): 414–20. http://dx.doi.org/10.1115/1.2904307.

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The energy approach recently proposed by Qiu and Weng (1992) is introduced to estimate the equivalent stress of the ductile matrix in Tohgo and Chou’s (1991) incremental damage theory for particulate-reinforced composites containing hard particles. In such a composite debonding of the particle-matrix interface is a significant damage process, as the damaged particles have a weakening effect while the intact particles have a reinforcing effect. In Tohgo-Chou’s theory, which describes the elastic-plastic behavior and the damage behavior of particulate-reinforced composites, it was assumed that the debonding damage is controlled by the stress of the particle and the statistical behavior of the particle-matrix interfacial strength, and that the debonded (damaged) particles are regarded as voids, resulting in an increased void concentration with deformation. On the other hand, Qiu-Weng’s energy approach provides a reasonable equivalent stress of the matrix in the porous material and particulate-reinforced composite even under a high triaxiality. The incremental damage theory developed here enables one to calculate the overall stress-strain response and damage evolution of the composite under high triaxial tension. The stress-strain relations for porous material obtained by the present incremental theory are completely consistent with that obtained by Qiu and Weng. The influence of the debonding damage on the stress-strain response is demonstrated for particulate-reinforced composites.

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Ngai, Tungwai Leo, Yuan Yuan Li, and Zhao Yao Zhou. "A Study on Ti₃SiC₂ Reinforced Copper Matrix Composite by Warm Compaction Powder Metallurgy." Materials Science Forum 532-533 (December 2006): 596–99. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.596.

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Increasing density is the best way to increase the performance of powder metallurgy materials. Conventional powder metallurgy processing can produce copper green compacts with density less than 8.3g/cm3 (a relative density of 93%). Performances of these conventionally compacted materials are substantially lower than their full density counterparts. Warm compaction, which is a simple and economical forming process to prepare high density powder metallurgy parts or materials, was employed to develop a Ti3SiC2 particulate reinforced copper matrix composite with high strength, high electrical conductivity and good tribological behaviors. Ti3SiC2 particulate reinforced copper matrix composites, with 1.25, 2.5 and 5 mass% Ti3SiC2 were prepared by compacting powder with a pressure of 700 MPa at 145°C, then sintered at 1000°C under cracked ammonia atmosphere for 60 minutes. Their density, electrical conductivity and ultimate tensile strength decrease with the increase in particulate concentration, while hardness increases with the increase in particulate concentration. A small addition of Ti3SiC2 particulate can increase the hardness of the composite without losing much of electrical conductivity. The composite containing 1.25 mass% Ti3SiC2 has an ultimate tensile strength of 158 MPa, a hardness of HB 58, and an electrical resistivity of 3.91 x 10-8 Ω.m.

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Arun, K. S., T. Panneerselvam, and S. Raghuraman. "Study on Mechanical Properties of Aluminium Based Metal Matrix Composites by Hybrid Reinforcement." Applied Mechanics and Materials 813-814 (November 2015): 116–20. http://dx.doi.org/10.4028/www.scientific.net/amm.813-814.116.

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Now a day’s Hybrid Metal Matrix composites has a large number of applications in automobiles, aircrafts and structural applications like brake rotors, engine parts and cylinder liners. The aim of this study is to determine the mechanical properties of boron carbide (B4C) and zirconium silicate (ZrSiO4) particulate reinforced with AA6063 alloy composites. In this experimental study, B4C and ZrSiO4 particulates reinforced with AA6063 composites were manufactured by stir casting technique. Mechanical properties of these composite materials were investigated by different weight percentages, 3%, 6%, 9% of boron carbide (B4C) and 9%, 6%, 3% of zirconium silicate (ZrSiO4) respectively. The mechanical properties evaluation reveals variations in hardness and the tensile strength values with the composite combinations investigated in this work. From the experimental studies, the optimum volume fraction of hybrid reinforcement in AA6063 alloy on the basis of mechanical properties and SEM analysis is also determined.

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Sayuti, Mohd, Shamsuddin Sulaiman, B. T. Hang Tuah Baharudin, Mohd Khairol A. Arifin, S. Suraya, and Gholamreza Esmaeilian. "Mechanical Vibration Technique for Enhancing Mechanical Properties of Particulate Reinforced Aluminium Alloy Matrix Composite." Key Engineering Materials 471-472 (February 2011): 721–26. http://dx.doi.org/10.4028/www.scientific.net/kem.471-472.721.

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The effects of subjecting solidifying particulate reinforced aluminium alloy matrix composite to various sources of vibration on the resulting casting quality, a mechanical vibration technique for inducing vibration resulting in enhanced mechanical properties, such as impact properties is devised. TiC particulate reinforced LM6 alloy matrix composites are fabricated by different particulate weight fraction of titanium dioxide and microstructure studies were conducted to determine the impact strength and density, respectively. Preliminary works show that the mechanical properties have been improved by using vibration mold during solidification compared to gravity castings without vibration.

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Olusunmade, Olusola Femi, Sunday Zechariah, and Taofeek Ayotunde Yusuf. "CHARACTERIZATION OF RECYCLED LINEAR DENSITY POLYETHYLENE/IMPERATA CYLINDRICA PARTICULATE COMPOSITES." Acta Polytechnica 58, no. 3 (July 2, 2018): 195. http://dx.doi.org/10.14311/ap.2018.58.0195.

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Water-sachets made from low density polyethylene (LDPE) form a bulk of plastic wastes which creates environmental challenges, while certain species of plants like Imperata cylindrica constitute large portion of weeds on farm lands. As a technological approach to the reduction and utilization of these materials, composites of Imperata cylindrica (IC) particulate and synthetic polymer (from recycled waste water-sachets) were produced and evaluated for several mechanical and physical properties. The production of the composites and testing were done using the standard methods available in the literature. The results showed an increase in tensile modulus, hardness, impact strength, and water absorption of the composite in comparison with unreinforced polymer, as the IC particulate loading increased from 5 wt% to 30 wt%. However, there was a decrease in tensile strength, percentage elongation at break and density of the composite as the particulate loading increased from 5 wt% to 30 wt%. The combination of the recycled waste water-sachets and IC particulate is really promising for composites development. This creates opportunities to reduce LDPE wastes and add economic importance to an otherwise agricultural menace. It will mean creating an economic value from “wastes”.

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Baghchesara, Mohammad Amin, Hossein Abdizadeh, and Hamid Reza Baharvandi. "Effects of MgO Nano Particles on Microstructural and Mechanical Properties of Aluminum Matrix Composite prepared via Powder Metallurgy Route." International Journal of Modern Physics: Conference Series 05 (January 2012): 607–14. http://dx.doi.org/10.1142/s201019451200253x.

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The objective of the present investigation was to evaluate the microstructural and mechanical properties of Al /nano MgO composite prepared via powder metallurgy method. Pure atomized aluminum powder with an average particle size of 1μm and MgO particulate with an average particle size between 60 to 80 nm were used. Composites containing 1.5, 2.5 and 5 percent of volume fraction of MgO were prepared by powder metallurgy method. The specimens were pressed by Cold Isostatic Press machine (CIP), subsequently were sintered at 575, 600 and 625°C. After sintering and preparing the samples, mechanical properties were measured. The results of microstructure, compression and hardness tests indicated that addition of MgO particulates to aluminum matrix composites improves the mechanical properties.

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Sarkar, Pujan, Nipu Modak, and Prasanta Sahoo. "Reciprocating Friction and Wear Characteristics of Al Particulate Glass Epoxy Composites." International Journal of Surface Engineering and Interdisciplinary Materials Science 4, no. 1 (January 2016): 25–44. http://dx.doi.org/10.4018/ijseims.2016010102.

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An experimental study has been carried out to investigate the reciprocating friction and wear characteristics of woven glass epoxy composites filled with Al particulate using a reciprocating friction and wear tester. The fiber weight fraction has been kept constant at 60 wt% and Al wt% is varied as 0, 5, 10, and 15%. The composite is fabricated in hand lay-up technique followed by light compression moulding. Friction and wear behavior under dry reciprocating condition has been presented as function of reciprocating distance keeping reciprocating frequency and normal load constant at 30 Hz and 1.0 Kg respectively. Composites having 5 and 10 wt% Al powder exhibit less friction and wear loss as compared to unfilled glass epoxy composite whereas 15 wt% Al filled glass epoxy composite reports highest friction and wear loss. An attempt has been made to observe the distribution of fiber and Al particles in the composite, and to correlate the wear behavior using Scanning Electron Microscopy (SEM) observations.

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Kang, Guo Zheng, and Yu Jie Liu. "Uniaxial and Multiaxial Cyclic Deformation Behaviors of SiCp/6061Al Alloy Composites." Key Engineering Materials 353-358 (September 2007): 1247–50. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.1247.

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The uniaxial/multiaxial cyclic deformation behaviors of SiCp/6061Al alloy composites with various particulate volume fractions were studied by uniaxial and multiaxial cyclic straining or stressing tests at room temperature. The cyclic softening/hardening features and ratcheting behaviors of T6-treated composites and un-reinforced matrix were discussed in different loading conditions. It is shown that the ratcheting also occurs in the composites under uniaxial and multiaxial asymmetrical cyclic stressing, and the ratcheting strain increases with stress amplitude and mean stress; however, the addition of SiC particulates into the matrix increases the resistance of the composite to ratcheting. The ratcheting depends greatly on the shapes of loading paths and mainly occurs in the direction of non-zero mean stress.

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Roudini, Ghodratollah, Mehdi Asgharian, and Morteza Khosravi. "High Volume Fraction Aluminum /Alumina-Fused Silica Hybrid Particulate Metal Matrix Composite." Advanced Materials Research 701 (May 2013): 3–7. http://dx.doi.org/10.4028/www.scientific.net/amr.701.3.

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High volume fraction Aluminum/alumina-fused silica hybrid metal matrix composites containing alumina with 0, 10, 30 and 50 wt% fused silica were produced by melt squeezing casting method. Microstructure of hybrid composite was investigated by optical microscope and scanning electron microscopy (SEM). The SEM images showed uniform distribution of fused silica particles in composite microstructure. Also compressive strength of the composites changed (310-110 MPa) with amount of fused silica.

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Bowen, C. P., R. E. Newnham, and C. A. Randall. "Dielectric properties of dielectrophoretically assembled particulate-polymer composites." Journal of Materials Research 13, no. 1 (January 1998): 205–10. http://dx.doi.org/10.1557/jmr.1998.0027.

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The dielectrophoretic effect is a phenomenon in which dipole-dipole interactions are induced between particles in a suspension by an electric field.1−5 This dipole interaction leads to the formation of chains or fibrils parallel to the applied electric field. Recently, the dielectrophoretic effect has been shown to be a possible composite assembly technique permitting property changes to be induced with the appropriate electric fields.6,7 The results presented in this paper show that the dielectrophoretic assembly process can be used to engineer anisotropy into composite materials. Various filler materials are aligned in a thermoset polyurethane matrix and the dielectric properties are measured. Comparisons are drawn between the dielectrophoretically assembled composites and those processed conventionally in the absence of an electric field. Dielectric properties are modeled with modified mixing laws and discussed in relation to the composite microstructure and the alpha relaxations of the polymer phase.

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Journal articles on the topic 'Particulate composite'

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