Relevant bibliographies by topics / Si3N4 tool

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Si3N4 tool'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Si3N4 tool"

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Zou, Bin, Chuan Zhen Huang, Han Lian Liu, and Jin Peng Song. "Cutting Performance and Wear Mechanism of Si3N4-Based Nanocomposite Ceramic Tool." Key Engineering Materials 443 (June 2010): 324–29. http://dx.doi.org/10.4028/www.scientific.net/kem.443.324.

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Si3N4/TiN nanocomposite tool and Si3N4/Ti(C7N3) nanocomposite tool were prepared. The cutting performance and wear mechanism of Si3N4-based nanocomposite ceramic tool was investigated by comparison with a commercial sialon ceramic tool in machining of 45 steel. Si3N4-based nanocomposite ceramic tool exhibits the better wear resistance than sialon at the relatively high cutting speed. The increased cutting performance of Si3N4-based nanocomposite ceramic tool is ascribed to the higher mechanical properties. Nano-particles can refine the matrix grains and improve the bonding strength among the matrix grains of Si3N4-based nanocomposite ceramic tool materials. It contributes to an improved wear resistance of the cutting tools during machining.
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Wang, Zhenhua, Jiheng Jia, Liyan Cao, Ning Sun, and Yulin Wang. "Microstructure and Mechanical Properties of Spark Plasma Sintered Si3N4/WC Ceramic Tools." Materials 12, no. 11 (June 10, 2019): 1868. http://dx.doi.org/10.3390/ma12111868.

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Silicon nitride (Si3N4) based ceramic tools exhibit good machinability in cutting materials such as gray cast iron, ductile iron, malleable cast iron, and superalloys due to excellent high-temperature mechanical properties. In this paper, high-performance Si3N4-based ceramic tools containing tungsten carbide (WC) and cobalt (Co) were studied. Effects of the WC content and Co content on mechanical properties and a microstructure of Si3N4-based ceramic materials were analyzed. Results showed that Si3N4-based ceramic material containing 10 wt % WC and 1 wt % Co had the best comprehensive mechanical properties at a sintering temperature of 1650 °C and holding time of 6 min, achieving Vickers hardness, fracture toughness, and room temperature bending strength of 16.96 GPa, 7.26 MPa·m1/2, and 1132 MPa, respectively. The microstructure of Si3N4-based ceramic tool material is uniform without obvious abnormal growth. The Si3N4-based ceramic tool was mainly composed of α-Si3N4, β-Si3N4, and WC phases.
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Lü, Zhi Jie, Ming Feng Ding, and Jun Zhao. "Wear Mechanism of Si3N4/TiC Micro-Nano-Composite Ceramic Tool in Dry Machining of Nodular Cast Iron." Applied Mechanics and Materials 319 (May 2013): 79–83. http://dx.doi.org/10.4028/www.scientific.net/amm.319.79.

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In this paper, a type of Si3N4/TiC micro-nano-composite ceramic tool materials were fabricated via hot pressing technique by adding Si3N4 and TiC nanoparticles and with Al2O3 and Y2O3 as additives. Tool wear in dry machining of nodular cast iron with Si3N4/TiC micro-nano-composite ceramic tool were investigated, in comparison with a commercial Sialon ceramic tool. For determination of the wear resistance, the workpiece which is prepared to be used in the experiment, 400 mm in length and 120 mm in diameter, is machined in lathe. Turning experiments were carried out at three different cutting speeds, which were 110, 175, and 220 m/min respectively. Feed rate (f) and depth of cut (ap) were kept fixed at 0.1mm/rev and 0.5mm. The results show that the two types of cutting tools have similar cutting tool wear behavior, while the Si3N4/TiC micro-nano-composite tool exhibits a better wear resistance than that of the Sialon tool. The wear of Si3N4/TiC micro-nano-composite ceramic cutting tool is mainly dominated by the abrasion, while the wear of Sialon ceramic cutting tool is dominated by the abrasive action, microcracking and pullout of grains.
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Lü, Zhi Jie, Xian Chun Song, Ming Feng Ding, and Yong Hui Zhou. "Cutting Force, Temperature and Wear Behavior in Dry Machining of Nodular Cast Iron with Si3N4/TiC Micro-Nano-Composite Ceramic Tool." Advanced Materials Research 711 (June 2013): 267–71. http://dx.doi.org/10.4028/www.scientific.net/amr.711.267.

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In this paper, a type of Si3N4/TiC micro-nanocomposite ceramic tool materials were fabricated via hot pressing technique by adding Si3N4 and TiC nanoparticles. Cutting forces, temperature and wear behavior in dry machining of nodular cast iron with Si3N4/TiC micro-nanocomposite ceramic tool were investigated, in comparison with a commercial Sialon ceramic tool. Turning experiments were carried out at three different cutting speeds, which were 110, 175, and 220 m/min. Feed rate ( f ) and depth of cut (ap) were kept fixed at 0.1 mm/rev and 0.5 mm. The results show that the radial thrust force (Fy) become the largest among the three cutting force components (Fx , Fy and Fz), and Fy is the most sensitive to the changes of feed rate and depth of cut. In dry cutting of nodular cast iron, the cutting tool temperature rise rapidly with increase in cutting speed. The cutting temperature reach nearly 1000°C at the cutting speed of 220 m/min. The two types of ceramic tools have similar cutting performance, while the Si3N4/TiC micro-nanocomposite tool exhibits a better cutting performance than that of the Sialon tool. The wear rate of Si3N4/TiC micro-nanocomposite ceramic cutting tool is mainly dominated by the abrasion, while the wear rate of Sialon ceramic cutting tool is dominated by the abrasive action, and pullout of grains.
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Lü, Zhi Jie, Jun Zhao, and Wei Min Wang. "Microstructure and Wear Behavior of Si3N4/TiC Nanocomposite Ceramic Tool Material." Advanced Materials Research 279 (July 2011): 54–60. http://dx.doi.org/10.4028/www.scientific.net/amr.279.54.

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Si3N4/TiC nanocomposite cutting tool materials were fabricated by adding Si3N4 and Al2O3 nanocomposites with Al2O3 and Y2O3 as additives. The microstructures of materials were analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and then wear resistance of Si3N4/TiC nanocomposite cutting tool materials was studied when machining cast iron and quenched steel in continuous dry turning experiments. Micrographs of the worn tools materials were observed with SEM. Results showed that TiC nanoparticles distribute in the matrix grains and lead to the crack deflection as well as crack pinning. Due to TiC nanoparticles and β-Si3N4 quasiwhiskers, the crack trajectories exhibited crack deflection, rod-like grain bridging and pull-out. Wear mode of Si3N4/TiC inserts is mainly abrasive wear with slighter adhesive wear when machining cast iron. The dominant wear patterns during the cutting of quenched steel were adhesion, abrasion, as well as oxidation and diffusion under high temperature.
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Wu, Zhi Yuan, Xiao Jun Shi, Xin Li Tian, Xiu Jian Tang, and Shu Zhang. "Heat Cutting for Remanufacture Hardness Deposited Materials." Applied Mechanics and Materials 101-102 (September 2011): 978–81. http://dx.doi.org/10.4028/www.scientific.net/amm.101-102.978.

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Three cutting tools, YG610, Si3N4 ceramic tool and CBN were adopted for heat cutting deposited materials. The test results show that though the impacts to the tools reducing, the CBN still break seriously. The condition by Si3N4 ceramic tool is better than CBN, whose types of tool failure change from breakage to wear. The YG610 is best material for heat cutting, whose minimum VB value is only 0.3mm. In the experiment, the wear increase with the increasing of heating temperature, cutting speed, cutting depth. But it decreased with feed rate. The analysis results show that the red-hardness is most importance factor for wears of YG610.
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Zou, Bin, Chuan Zhen Huang, Jun Wang, and Bing Qiang Liu. "Effect of Nano-Scale TiN on the Mechanical Properties and Microstructure of Si3N4 Based Ceramic Tool Materials." Key Engineering Materials 315-316 (July 2006): 154–58. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.154.

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An effect of nano-scale TiN grains on the mechanical properties and microstructure of Si3N4 based ceramic tool materials is investigated at the different sintering temperature. Compared to monolithic Si3N4 ceramic tool materials, the sintering temperature is decreased and mechanical properties is enhanced when only one percent of nano-scale TiN in term of mass is added into the Si3N4 matrix. The optimum mechanical properties are achieved when Si3N4/TiN nanocomposites tool materials were sintered at the sintering conditions of 1650, 30MPa and holding time of 40min. The flexural strength, fracture toughness and hardness are 1018.2MPa, 8.62MPa⋅m1/2 and 14.58GPa respectively. SEM micrographs indicate that microstructure is composed of the elongated and equiaxed β-Si3N4 grains, and some nano-scale TiN grains are enveloped into matrix grains.
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Liu, Y. R., J. J. Liu, B. L. Zhu, Z. R. Zhou, L. Vincent, and P. Kapsa. "Wear maps of Si3N4 ceramic cutting tool." Journal of Materials Engineering and Performance 6, no. 5 (October 1997): 671–75. http://dx.doi.org/10.1007/s11665-997-0063-7.

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Kuzin, Valery V., and Sergey N. Grigoriev. "Tool Life and Wear Mechanism of Coated Si3N4 Ceramic Tools in Turning Grey Cast Iron." Key Engineering Materials 581 (October 2013): 14–17. http://dx.doi.org/10.4028/www.scientific.net/kem.581.14.

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This paper presents results of the investigation of Si3N4 ceramic inserts with CVD coatings in turning grey cast iron. The high effectiveness of Si3N4 ceramic inserts with multi-layered coating in the finish turning of the grey irons was shown. It was established that at the heart of the wear mechanism of coated Si3N4 ceramic inserts there is a chain of relations cutting conditions loading fracture of coating сhipping of ceramic surface layer failure of tools. One of the important features of wear mechanism of these tools is the operational defects formed at the coating substrate interface.
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Souza, José Vitor C., Maria do Carmo de Andrade Nono, Sergio Luiz Mineiro, M. V. Ribeiro, and Olivério Moreira Macedo Silva. "Evaluation of the Performance of α-SiAlON Tool when Turning Ti–6Al–4V Alloy without Coolant." Materials Science Forum 591-593 (August 2008): 554–59. http://dx.doi.org/10.4028/www.scientific.net/msf.591-593.554.

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Due to their high hardness and wear resistance, Si3N4 based ceramics are one of the most suitable cutting tool materials for machining cast iron, nickel alloys and hardened steels. However, their high degree of brittleness usually leads to inconsistent results and sudden catastrophic failures. This necessitates a process optimization when machining superalloys with Si3N4 based ceramic cutting tools. The tools are expected to withstand the heat and pressure developed when machining at higher cutting conditions because of their high hardness and melting point. This paper evaluates the performance of α-SiAlON tool in turning Ti–6Al–4V alloy at high cutting conditions, up to 250 m min−1, without coolant. Tool wear, failure modes and temperature were monitored to access the performance of the cutting tool. Test results showed that the performance of α-SiAlON tool, in terms of tool life, at the cutting conditions investigated is relatively poor due probably to rapid notching and excessive chipping of the cutting edge. These facts are associated with adhesion and diffusion wear rate that tends to weaken the bond strength of the cutting tool.
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Dissertations / Theses on the topic "Si3N4 tool"

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Karki, Utsab. "Experimental and Numerical Study of High-Speed Friction Stir Spot Welding of Advanced High-Strength Steel." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5521.

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With the desire to lighten the frame while keeping or increasing the strength, Advanced High-Strength Steels (AHSS) have been developed for use in the automotive industry. AHSS meet many vehicle functional requirements because of their excellent strength and acceptable ductility. But joining AHSS is a challenge, because weldability is lower than that of mild steels. Friction stir spot welding (FSSW) is a solid state joining process that can provide a solution to the weldability issues in AHSS, but FSSW has not been studied in great detail for this application. In this work, Si3N4 tools were used for FSSW experiments on DP 980 steel with 1.2mm thickness. Joint strength was measured by lap shear tension testing, while thermocouples were used for the temperature measurements. A finite element model was developed in order to predict material flow and temperatures associated with FSSW. Since a 3D model of the process is very time consuming, a novel 2D model was developed for this study. An updated Lagrangian scheme was employed to predict the flow of sheet material, subjected to the boundary conditions of the fixed backing plate and descending rotating tool. Heat generation by friction was computed by including the rotational velocity component from the tool in the thermal boundary conditions. Material flow was calculated from a velocity field while an isotropic, viscoplastic Norton-Hoff law was used to compute the material flow stress as a function of temperature, strain and strain rate. Shear stress at the tool/sheet interface was computed using the viscoplastic friction law. The model predicted welding temperatures to within 4% of the experiments. The welding loads were significantly over predicted. Comparison with a 3D model of FSSW showed that frictional heating and the proportion of total heat generated by friction were similar. The position of the joint interface was reasonably well predicted compared to experiment.
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Strehler, Claudia. "Development of near net shaped Si3N4/SiC composites with optimised grain boundary phase for industrial wood machining." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2011. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-71329.

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The introduction of ceramics into the market of wood cutting tools has failed so far due to the generally low toughness of ceramics which is causing brittle failure of the cutting edge. A feasibility study showed that Si3N4/SiC composites with fine elongated β-Si3N4 grains are a promising material for industrial wood machining and outperform commercial standard tungsten carbide tools in terms of lifetime. However, they were produced by hot pressing followed by very costly diamond cutting and grinding. The costs associated with the above production route are too high for an industrial viability. In this thesis Si3N4/SiC composites suitable for industrial wood milling are produced by a near net shape processing route including gas pressure sintering. These newly developed tools show less abrasive wear and consequently twice as long lifecycles than commercial standard tungsten carbide tools. Microscopic properties determine the performance of the Si3N4/SiC cutting tools. Therefore, an adequate selection of sintering additives is crucial. 12 wt% sintering additives are included in the composite as a combination of Al2O3 and the refractory oxides La2O3 and Y2O3. Important for the production of effective Si3N4/SiC wood cutting tools is the formation of a partly crystalline silicate phase within the multiple grain junctions during the final treatment by hot isostatic pressing. The use of MgO as a sintering additive for facilitating the densification of the Si3N4 ceramics inhibits the formation of the favourable silicate phase and must be avoided for the production of these wood cutting tools.
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Book chapters on the topic "Si3N4 tool"

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Šajgalík, P., M. Hnatko, Z. Lenčéš, J. Dusza, and M. Kašiarová. "In SituPreparation of Si3N4/SiC Nanocomposites for Cutting Tools Application." In Progress in Nanotechnology, 107–12. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9780470588260.ch15.

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Tanaka, Hiroshi. "A RECENT TENDENCY OF Si3N4 CUTTING TOOLS." In Advanced Materials '93, 541–45. Elsevier, 1994. http://dx.doi.org/10.1016/b978-0-444-81991-8.50134-5.

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Zheng, Guangming, and Jun Zhao. "Performance of Sialon/Si3N4 graded ceramic tools at high speed machining." In High Speed Machining, 27–62. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-815020-7.00002-3.

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Conference papers on the topic "Si3N4 tool"

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Seyringer, D., C. Burtscher, S. Partel, J. Edlinger, A. Maese-Novo, P. Muellner, R. Hainberger, J. Kraft, G. Koppitsch, and G. Meinhardt. "Design and simulation of Si3N4 based arrayed waveguide gratings applying AWG-Parameters tool." In 2016 18th International Conference on Transparent Optical Networks (ICTON). IEEE, 2016. http://dx.doi.org/10.1109/icton.2016.7550586.

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Nguyen, Dinh, Vadim Voznyuk, Mohammad Sayem Bin Abdullah, Dave Kim, and Patrick Y. Kwon. "Tool Wear of Superhard Ceramic Coated Tools in Drilling of CFRP/Ti Stacks." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2843.

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Abstract This paper aims to investigate the effectiveness of several superhard ceramic coatings on carbide drills when drilling carbon fiber reinforced plastics (CFRP) composite/Ti-6Al-4V alloy (titanium or Ti) stacks. The drilling experiments of CFRP/Ti stack are conducted with diamond-like coating (DLC) coated, alternating layers of the nanocomposite of AlCrN & Si3N4 and TiN or (AlCrSi/Ti)N coated, and uncoated tungsten carbide drills. Tool wear evolution of each drill is measured qualitatively as well as quantitatively using the scanning electron and confocal laser scanning microscopes (CLSM) by interrupting after making certain numbers of hole. Based on our drilling experiments, the performance of each coating when drilling CFRP/Ti stack are discussed. Among these coated and uncoated drills, uncoated and DLC coated drills failed before making 5 holes while (AlCrSi/Ti)N coated drills performed the best making more than 80 holes. The DLC coating, despite of high hardness of DLC coating, does not provide any significant protection especially when drilling Ti layer.
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Meji´a Rodri´guez, Gilberto, John E. Renaud, and Vikas Tomar. "A Variable Fidelity Model Management Framework for Multiscale Computational Design of Continuous Fiber SiC-Si3N4 Ceramic Composites." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35913.

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Research applications involving design tool development for multiple phase material design are at an early stage of development. The computational requirements of advanced numerical tools for simulating material behavior such as the finite element method (FEM) and the molecular dynamics method (MD) can prohibit direct integration of these tools in a design optimization procedure where multiple iterations are required. The complexity of multiphase material behavior at multiple scales restricts the development of a comprehensive meta-model that can be used to replace the multiscale analysis. One, therefore, requires a design approach that can incorporate multiple simulations (multi-physics) of varying fidelity such as FEM and MD in an iterative model management framework that can significantly reduce design cycle times. In this research a material design tool based on a variable fidelity model management framework is presented. In the variable fidelity material design tool, complex “high fidelity” FEM analyses are performed only to guide the analytic “low-fidelity” model toward the optimal material design. The tool is applied to obtain the optimal distribution of a second phase, consisting of silicon carbide (SiC) fibers, in a silicon-nitride (Si3N4) matrix to obtain continuous fiber SiC-Si3N4 ceramic composites (CFCCs) with optimal fracture toughness. Using the variable fidelity material design tool in application to one test problem, a reduction in design cycle time around 80 percent is achieved as compared to using a conventional design optimization approach that exclusively calls the high fidelity FEM.
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Xue, Qiang, Xing Ai, Jun Zhao, Yuanyuan Liu, and Yonghui Zhou. "Analysis of microstructure and mechanical properties of graded nano-composite Si3N4-based ceramic cutting tool material." In Mechanical Engineering and Information Technology (EMEIT). IEEE, 2011. http://dx.doi.org/10.1109/emeit.2011.6023785.

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Seyringer, D., C. Burtscher, S. Partel, J. Edlinger, A. Maese-Novo, P. Muellner, R. Hainberger, J. Kraft, G. Koppitsch, and G. Meinhardt. "Design and simulation of 20-channel 50-GHz Si3N4-based arrayed waveguide grating applying AWG-parameters tool." In SPIE OPTO, edited by Sonia M. García-Blanco and Gualtiero Nunzi Conti. SPIE, 2017. http://dx.doi.org/10.1117/12.2249675.

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Tian, X. H., J. Zhao, F. Gong, W. Z. Qin, and Q. Z. Xu. "Development of Si3N4/(W,Ti)C/Co Graded Nano-Composite Ceramic Tool and its Performance in Turning GH2132 Alloy." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9333.

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Strength and fracture toughness of ceramic tool materials can be enhanced by adding ductile phases. However, the hardness will be decreased, which is undesirable especially for cutting tool materials. Combining with functionally gradient materials (FGMs), the mechanical properties can be tailored so as to achieve high hardness at the outside of the ceramic materials leaving a relatively tough core inside. In this paper, a Si3N4/(W, Ti)C/Co graded composite ceramic tool material was fabricated by hot pressing technique. The composites without Co were used as the surface layers and the composites containing Co were used as the inner layers. Subsequently, the cutting performance of the graded ceramic cutting tool in turning iron-based high temperature alloy GH2132 was studied in comparison with common reference tool. The cutting forces, cutting temperature, tool wear modes and failure mechanisms were discussed. Results revealed that the resultant cutting forces firstly decrease and then increase with the increase of cutting speed, while the maximum cutting temperature increases gradually. Tool live of the FGM tool exceeds that of the corresponding common ceramic tool with the same composition systems. Formation of the residual compressive stress in the surface layer induced by the graded structure contributed to the longer tool life. The main failure modes of the FGM tool were adhesion, groove wear on the rake face and notch wear on the flank face. The graded tool shows better notch wear resistance than the common reference tool.
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Lovelace, Kirsten, and Sonya Smith. "Quantitative Characterization of Sapphire and Silicon Nitride for Space Applications Circuit Subassemblies Using Cryogenic Cycling." In ASME 2019 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/ipack2019-6499.

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Abstract This research investigates the effects of thermal cycling from room to cryogenic temperatures (300K–4K) on the thermal expansion coefficient of two ceramic substrates of Silicon Nitride (Si3N4) and alpha-Alumina/Sapphire (α-Al2O3). Due to the shortage of available data, a comparative study with reference materials, Copper, AISI Carbon Steel 1008 and Molybdenum, are compared to the National Institute of Standards and Technology (NIST) property data as a proof of concept. Accurate thermal contraction data of materials at low temperatures are important in material selection and thermal design of engineered systems, such as, space electronic devices. Thermal expansion mismatch causes substantial problems in space electronic device reliability because of the various stresses imposed on the joint materials undergoing extreme thermal cycles. Theory supports the advantage of utilizing Sapphire (Al2O3) and Silicon Nitride (Si3N4) within microchip configuration. However, there is limited data available that confidently supports this assertion beyond theory. An electro-mechanical method for in-situ strain measurements is presented as a tool to characterize thermomechanical behavior of Sapphire and Silicon Nitride at temperatures below 50 K. The calculated coefficient of thermal expansion for silicon nitride is 1.35 · 10−6 1/K and 0.994 · 10−6 1/K for sapphire at 5.7 K. The results from this validation have a mean error percentage of less than 6 %.
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Venkatadasu Ravindra, Holalu, Nodekoppalu Lingaiah Murali Krishna, and Rakshith Gowda Doddagarudanahalli Shivaramaiah. "Investigation on the Effect of Drilling Parameters on Quality of Hole in Epoxy Resin With and Without Carbon Fiber Reinforced With 6% and 10% Si3N4 Using FEA." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11188.

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Abstract Now days drilling of fiber reinforced plastics become a challenging task in terms of obtaining defect free holes. Quality of drilling mainly depends on cutting parameters such as spindle speed, feed rate, diameter of the drill etc. Recently Finite element analysis (FEA) is found to be the most reliable method to investigate the effect of such parameters on quality of hole in drilling of composites. Present study focuses on the drilling of Epoxy resin with and without carbon fiber reinforced with 6% and 10% volume of Si3N4 composites as per the Taguchi’s L27 standard orthogonal array using HSS tool. FEA is carried out for each combination of cutting parameters given by taguchi’s table. Simulation results such as stress distribution, strain and deformation in the material are correlated with the with the drilled hole performance characteristics like Cylindricity, circularity, delamination and surface roughness. Simulation results depict the influence of thrust force and torque on the degree of deformation, strength, elasticity and stress distribution in the work material during drilling. From the simulation, it is found that deformation, and equivalent stress in the material decreases with increase in the % of Si3N4 reinforcement resulting in minimum surface roughness. The effect of feed rate is more on the value of thrust force resulting in maximum principal stress, equivalent stress and directional deformation in the material, which leads to delamination at the entry and exit of the hole. Further, influence of spindle speed is more on the value of torque resulting in maximum principal stress, equivalent stress and directional deformation in the material, which leads to maximum value of Cylindricity.
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Khadke, Kunal R., Weigang An, and Andrés Tovar. "Ceramic Matrix Composite Materials by Design Using Robust Variable Fidelity Optimization." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-13348.

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Ceramic matrix composites (CMC) have been widely studied to tailor desired properties at high temperatures. However, research applications involving design tool development for multi-phase material design are at an early stage of development. While numerical CMC modeling provides significant insight on the material performance, the computational cost of the numerical simulations and the type of variables involved in these models are a hindrance for the effective application of design methods. This technical challenge heightens with the need of considering the uncertainty of material processing and service. For this reason, few design researchers have addressed the design paradox that accompanies the rapid design space expansion in CMC material design. The objective of this research is to establish a tractable approach for CMC design considering uncertainty. Traditionally, surrogate models of statistical data are incorporated in the design strategy. An alternative to surrogate modeling is the use of lower fidelity models, which captures some of the physics of the problem and avoids the generation of uncertainty quantification. A variable fidelity optimization (VFO) management framework is incorporated in this research. In the proposed VFO method, a high-fidelity, cohesive, finely meshed finite-element model guides the coarsely meshed, low-fidelity model towards the optimal material design. Uncertainty in CMC material processing (multiphase nucleation and growth) is quantified using a stochastic material microstructural lattice model. The lattice model is verified with laboratory processed microstructures. Dimension reduction for reduction of the number of random variables under consideration. Linear data transformation and principal component analysis (PCA) is traditionally used in dimension reduction. However, nonlinear dimension reduction techniques are better handle complex nonlinear data. This work incorporates Maximum Variance Unfolding (MVU) that preserves global properties of the original data in the low-dimensional representation. The proposed methodology is applied to the optimal distribution of the matrix and the disperse phases in the composite structure. Results are demonstrated in the design of silicon carbide (SiC) fibers in a silicon-nitride (Si3N4) matrix for maximum fracture energy. The results provide a reference for SiC-Si3N4 nanocomposite.
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Gajdošová, Lenka, and Dana Seyringer. "Simulation of 20-channel, 50-GHz, Si3N4-based arrayed waveguide grating applying three different photonics tools." In SPIE OPTO, edited by Sonia M. García-Blanco and Gualtiero Nunzi Conti. SPIE, 2017. http://dx.doi.org/10.1117/12.2267817.

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