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J. Korean Ceram. Soc. > Volume 24(4); 1987 > Article
Journal of the Korean Ceramic Society 1987;24(4): 364.
질화규소 요업체의 기지상 결정화가 파괴인성에 미치는 영향
김남균, 김도연, 강대갑1
서울대학교 공과대학 무기재료공학과
1대한중석(주) 기술연구소
Effect of Crystallization of Matrix Phase on the Fracture Toughness of Silicon Nitride Ceramics
The Si5AION7 specimens containing 20% YAG composition have been sintered and then heat treated to induce the crystallization of the matrix glassy phase. Crystallization of YAG phase during the heat treatment was detected from the X-ray diffraction patterns and the consequent changes in room temperature toughness as well as in microstructures were investigated. Almost all the glassy boundary phase were found to crystallize even after 5 minutes of heat treatment and the KC at room temperature decreased accordingly. The results show that the matrix crystallization can be induced by slow cooling from the sintering temperature.
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