Anisotropies in structure and properties of hot-press sintered h-BN-MAS composite ceramics: Effects of raw h-BN particle size |
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| Affiliation: | 1. Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, 150001, China;2. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150080, China;3. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, 150001, China;1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. College of Science, Honghe University, Mengzi 661199, Yunnan, China;3. School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, Shandong, China;1. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150080, China;2. Key Laboratory of Advanced Structrual-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China;3. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, China;1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China;2. National-provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan, China;3. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150080, China;1. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;2. Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China;3. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China;4. Institute for electronic and sensor materials, School of Materials Science and Engineering, Technische Universität Bergakademie Freiberg, Freiberg, Germany;1. High-performance Ceramics Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;3. State Key Laboratory of Green Building Materials, China Building Materials Academy, Beijing 100024, China;4. Science and Technology on Advanced Functional Composite Laboratory, Aerospace Research Institute of Materials and Processing Technology, No 1 South Dahongmen Road, Beijing 100076, China |
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| Abstract: | Effects of raw h-BN particle size from 0.5 μm to 11 μm on the phase compositions, texture degree, bending strength, fracture toughness and thermal conductivity of hot-press sintered h-BN-MAS composite ceramics were investigated. Larger h-BN grain can facilitate the nanocrystallization of MAS phase due to the inhibiting crystallization effect of h-BN on α-cordierite. Texture degree of h-BN-MAS composite ceramics increased significantly with increasing raw h-BN particle size, and the 11.0μmBN-MAS composite ceramic shows typical textured structure. The h-BN-MAS composite ceramics show anisotropy in mechanical properties and thermal conductivity, and the anisotropy increased significantly with increasing raw h-BN particle size. The 0.5μmBN-MAS sample shows excellent mechanical properties, and the 10μmBN-MAS sample shows strong anisotropy in thermal conductivity. |
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| Keywords: | Textured ceramics Anisotropy Mechanical properties Thermal conductivity |
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