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J. Korean Ceram. Soc. > Volume 45(1); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(1): 60.
doi: https://doi.org/10.4191/kcers.2008.45.1.060
방전플라즈마 소결법에 의한 탄화 붕소 세라믹스의 소결 거동 및 기계적 특성
김경훈, 채재홍, 박주석, 김대근, 심광보1, 이병하2
1한양대학교 신소재공학부
2명지대학교 신소재공학부
Sintering Behavior and Mechanical Property of B4C Ceramics Fabricated by Spark Plasma Sintering
Kyoung-Hun Kim, Jae-Hong Chae, Joo-Seok Park, Dae-Keun Kim, Kwang-Bo Shim1, Byung-Ha Lee2
Korea Institute of Ceramic Engineering and Technology
1Division of Advanced Materials Science and Engineering, Hanyang University
2Department of Materials Science and Engineering, Myongji University
[ $B_4C$ ] ceramics were fabricated by spark plasma sintering process and their sintering behavior, microstructure and mechanical properties were evaluated. Relative density of $B_4C$ ceramics could be achieved by spark plasma sintering method reached as high as 99% at lower temperature than conventional sintering method, in addition, without any sintering additives. The mechanical properties of $B_4C$ ceramics could be improved by the heat treatment at $1300^{circ}C$ during sintering process which can be removed $B_2O_3$ phase from a $B_4C$ powder surface. This improvement results from the formation of a fine and homogeneous microstructure because the grain coarsening was suppressed by the elimination of $B_2O_3$ phase. Particularly, mechanical properties of the specimen experienced the $B_2O_3$ removing process improved over 30% compared with the specimen without that process.
Key words: $B_4C$, Microstructure, Mechanical property, Spark plasma sintering
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