Effect of seeding on the thermal conductivity of self-reinforced silicon nitride |
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| Affiliation: | 1. National Institute for Research in Inorganic Materials, 1-1, Namiki, Tsukuba-shi, Ibaraki, 305-0044, Japan;2. Materials Research Laboratory, Nissan Motor Co., Ltd., 1, Natsushima-cho, Yokosuka-shi, Kanagawa, 237-8523, Japan;1. State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, PR China;2. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, PR China;3. National-Provincial Joint Engineering Research Center of High Temperature Materials and Lining Technology, Wuhan University of Science and Technology, Wuhan 430081, PR China;1. Belgorod National Research University, 85, Pobedy Str., 308015 Belgorod, Russia;2. Voronezh State University, 1, University Square, 394036 Voronezh, Russia;1. School of Mechanical-electronic and Vehicle Engineering, Weifang University, Weifang, 261061, China;2. Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), Institute of Ceramics and Powder Metallurgy, School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, 110819, China;3. Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario, M5B 2K3, Canada;1. Yokohama National University, Yokohama 240-8501, Japan;2. Kanagawa Academy of Science and Technology, Kawasaki 213-0012, Japan;1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China;2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China |
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| Abstract: | Thermal conductivity of Si3N4 containing large β-Si3N4 particles as seeds for grain growth was investigated. Seeds addition promotes growth of β-Si3N4 grains during sintering to develop the duplex microstructure. The thermal conductivity of the material sintered at 1900 °C improved up to 106 W m−1 K−1, although that of unseeded material was 77 Wm−1 K−1. Seeds addition leads to reduction of the sintering temperature with developing the duplex microstructure and with improving the thermal conductivity, which benefits in terms of production cost of Si3N4 ceramics with thermal conductivity. © |
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