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Journal of the Korean Ceramic Society 1995;32(10): 1139. |
| 물라이트의 환원분해 및 탄화법에 의한 $beta$-SiC 휘스커의 합성 |
| 김종엽, 남원식, 최상욱 |
| 인하대학교 무기재료공학과 |
| Synthesis of $beta$-SiC Whiskers by Decomposition-Carbonization of Mullite |
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| ABSTRACT |
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$beta$-SiC whiskers could be formed from a system of mullite-carbon-hydrogen by VLS mechanism at elevated temperatures. It was considered that methane gases were generated from the reaction of hydrogen gases with carbon black, and were reacted with mullite to produce two kinds of gases; silicon suboxide (SiO) and carbon monoxide (CO) of precursors of SiC. With increasing the synthesizing temperature up to 146$0^{circ}C$, the formation of $beta$-SiC whisker increased from 0.58 mg/$textrm{cm}^2$ to 3.98 mg/$textrm{cm}^2$ on the basis of unit area of carbon block, and the diameters of whiskers had their uniformity due to the reduction in stacking faults. |
| Key words:
SiC whisker, Decomposition of mullite, SiO gas |
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