Microstructure and properties of ZrB2–SiC composites prepared by spark plasma sintering using TaSi2 as sintering additive |
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| Authors: | Chunfeng Hu Yoshio Sakka Hidehiko Tanaka Toshiyuki Nishimura Shuqi Guo Salvatore Grasso |
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| Affiliation: | 1. World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;2. Fine Particle Processing Group, Nano Ceramics Center, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;3. Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tenodai, Tsukuba, Ibaraki 305-8571, Japan;4. Hybrid Materials Center, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan;1. Department of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;2. Department of Mining and Metallurgy Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran;3. Ceramic Department, Materials and Energy Research Center (MERC), Karaj, Iran;4. Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea;1. Department of Materials Engineering, Sahand University of Technology, Tabriz, Iran;2. Department of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;3. Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea;1. Department of Mining and Metallurgical Engineering, Amirkabir University of Technology (Tehran Polytechnic), P. O. Box 15875-4413, Tehran, Iran;2. Young Researchers and Elite Club, Miyaneh Branch, Islamic Azad University, Miyaneh, Iran;3. Department of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;4. Department of Materials Engineering, Shahid Rajaee Teacher Training University, Lavizan, Tehran, Iran;5. Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul, 08826, Republic of Korea;1. Department of Materials Science and Engineering Tarbiat Modares University, PO Box 14115-143, Tehran, Iran;2. School of Metallurgy and Materials, College of Engineering, University of Tehran, Tehran, Iran;1. Ceramic Dept., Materials and Energy Research Center, Alborz, Iran;2. Department of Mechanical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran;1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;2. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;3. Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK |
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| Abstract: | ZrB2–SiC composites were fabricated by spark plasma sintering (SPS) using TaSi2 as sintering additive. The volume content of SiC was in a range of 10–30% and that of TaSi2 was 10–20% in the initial compositions. The composites could be densified at 1600 °C and the core–shell structure with the core being ZrB2 and the shell containing both Ta and Zr as (Zr,Ta)B2 appeared in the samples. When the sintering temperature was increased up to 1800 °C, only (Zr,Ta)B2 and SiC phases could be detected in the samples and the core–shell structure disappeared. Generally, the composites with core–shell structure and fine-grained microstructure showed the higher electrical conductivity and Vickers hardness. The completely solid soluted composites with coarse-grained microstructure had the higher thermal conductivity and Young's modulus. |
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