Fabrication of mullite-bonded porous silicon carbide ceramics by in situ reaction bonding |
| |
| Affiliation: | 1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China;2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China;3. Department of Materials Science and Engineering, University of Missouri-Rolla, Rolla, MO 65409, USA;1. Korea University of Science & Technology, Daejeon 305-350, South Korea;2. Powder and Ceramics Division, Korea Institute of Materials Science, Changwon Gyeongnam 642-831, South Korea;1. Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, China;2. College of Physics and Electronic Information, Tianjin Normal University, Tianjin 300387, China;3. State Key Laboratory of New Ceramics & Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. Korea University of Science & Technology (UST), Daejeon 305-350, Republic of Korea;2. Powder and Ceramics Division, Korea Institute of Materials Science (KIMS), Changwon, Gyeongnam 642-831, Republic of Korea;1. School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, 255049, People''s Republic of China;2. School of Materials Science and Engineering, Shandong University of Technology, Zibo, 255049, People''s Republic of China;3. State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, People''s Republic of China |
| |
| Abstract: | An in situ reaction bonding technique was developed to fabricate mullite-bonded porous silicon carbide (SiC) ceramics in air from SiC and α-Al2O3, using graphite as the pore-former. Graphite is burned out to produce pores and the surface of SiC is oxidized to SiO2 at high temperature. With further increasing the temperature, the amorphous SiO2 converts into cristobalite and reacts with α-Al2O3 to form mullite (3Al2O3·2SiO2). SiC particles are bonded by the mullite and oxidation-derived SiO2 to obtain porous SiC ceramics. The reaction bonding behavior, open porosity, pore size distribution and mechanical strength of porous SiC ceramics were investigated as a function of the sintering temperature, forming pressure and graphite content. In addition, the phase composition and microstructure were also studied. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
