Phase and Microstructure of SiC-AlN Ceramics Prepared by Pressureless Sintering

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J. Korean Ceram. Soc. > Volume 32(11); 1995 > Article

Journal of the Korean Ceramic Society 1995;32(11): 1308.

상압소결에 의하여 제조된 SiC-AlN 세라믹스의 상 및 미세구조

최웅, 이종국¹, 조덕호², 김환

서울대학교 무기재료공학과
¹조선대학교 재료공학과
²요업기술원

Phase and Microstructure of SiC-AlN Ceramics Prepared by Pressureless Sintering

ABSTRACT

Changes in phase and microstructure were investigated in the SiC-AlN ceramics prepared by pressureless sintering using yttrium aluminum garnet (YAG) as a sintering aid at 200$0^{circ}C$ and 210$0^{circ}C$. The SiC/AlN ratio made a remarkable difference in densification, phase relations and the morphology of grains. In the AlN-rich composition, major phase was 2H and microstructure was composed of the densified equiaxed grains irrespective of the sintering temperatures. While those sintered at 200$0^{circ}C$ were porous with major phase being 3C, the rod-like and the equiaxed grains were coexisted when sintered at 210$0^{circ}C$ in the SiC-rich composition.

Key words: SiC-AlN ceramics, Pressureless sintering, 2H solid solution