완도납석으로부터 제조한 $\beta$-Sialon에 대한 SiC의 복합화 효과

Effect of SiC Dispersion of $\beta$-Sialon Prepared from Wando Pyrophylite

  • 이홍림 (연세대학교 요업공학과) ;
  • 김신 (연세대학교 요업공학과) ;
  • 이형직 (현대자동차주식회사 연구소)
  • 발행 : 1988.03.01

초록

완도납석과 carbon black 의 혼합물을 135$0^{\circ}C$에서 질소분위기를 사용하여 탄소환원질화법으로 $\beta$-Sialon 분물에 $\beta$-SiC를 제2상으로 넣어서 $Y_2O_3$$ZrO_2$를 각 소결조제로 사용하여 175$0^{\circ}C$에서 2시간 동안 상압소결하였다. 10wt %의 $Y_2O_3$를 소결조제로 사용하였을 때에 파괴인성은 3.8MN/m^{3/2}$, 3점꺽임 강도는 470MN/$m^2$ 그리고 경도는 13.7MN/$m^2$로서 좋은 값을 나타내었다. 이와 같은 파괴인성과 꺽임강도의 증가는 균열편향과 균열나눠짐에 의한 것으로 생각된다.

키워드

참고문헌

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