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J. Korean Ceram. Soc. > Volume 32(10); 1995 > Article
Journal of the Korean Ceramic Society 1995;32(10): 1162.
탄화규소의 액상소결
김원중, 김영욱1
서울시립대학교 재료공학과
1한국과학기술연구원 세라믹스연구부
Liquid Phase Sintering of Silicon Carbide
Systematic studies of the effects of additives and processing variables on the sintered density and the effect of crystalline forms of starting powders on the microstructure of pressureless sintered silicon carbide are described. Oxide additives were effective for the densification of SiC up to 96% of theoretical density at temperature as low as 185$0^{circ}C$. Use of embedding powder increased the sintered density, up to 98% of theoretical density, by decreasing the weight loss during sintering. Composite type duplex microstructure has been developed due to the $beta$longrightarrow$alpha$ phase transformation of SiC by sintering at 185$0^{circ}C$ and heat treatment at 195$0^{circ}C$ for 1h.
Key words: Silicon carbide, Liquid phase sintering, Embedding powder, Duplex microstructure
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