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J. Korean Ceram. Soc. > Volume 50(6); 2013 > Article
Journal of the Korean Ceramic Society 2013;50(6): 429.
doi: https://doi.org/10.4191/kcers.2013.50.6.429
실리콘과 카본을 이용한 다공질 탄화규소의 제조와 기계적 특성
김종찬, 이은주, 김득중
성균관대학교 신소재공학과
Fabrication and Mechanical Properties of Porous Silicon Carbide Ceramics from Silicon and Carbon Mixture
Jong-Chan Kim, Eun Ju Lee, Deug-Joong Kim
School of Advanced Materials Science & Engineering, Sungkyunkwan University
ABSTRACT
Silicon, carbon, and B4C powders were used as raw materials for the fabrication of porous SiC. ${beta}$-SiC was synthesized at $1500^{circ}C$ in an Ar atmosphere from a silicon and carbon mixture. The synthesized powders were pressed into disk shapes and then heated at $2100^{circ}C$. ${beta}$-SiC particles transformed to ${alpha}$-SiC at over $1900^{circ}C$, and rapid grain growth of ${alpha}$-SiC subsequently occurred and a porous structure with elongated plate-type grains was formed. The mechanism of this rapid grain growth is thought to be an evaporation-condensation reaction. The mechanical properties of the fabricated porous SiC were investigated and discussed.
Key words: Silicon carbide, Porous ceramic, Phase transformation, Grain growth
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