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J. Korean Ceram. Soc. > Volume 39(10); 2002 > Article
Journal of the Korean Ceramic Society 2002;39(10): 948.
doi: https://doi.org/10.4191/kcers.2002.39.10.948
반응소결 탄화규소 다공체의 기계적 특성
황성식, 박상환1, 한재호1, 한경섭1, 김찬목
국민대학교 자동차공학과
1한국과학기술연구원 복합기능 세라믹스 연구센터
Mechanical Properties of Porous Reaction Bonded Silicon Carbide
Sung-Sic Hwang, Sang-Whan Park1, Jae-Ho Han1, Kyung-Sop Han1, Chan-Mook Kim
Department Automotive Engineering, Kookmin University
1Multi-Functional Ceramics Research Center, KIST Seoul
Porous reaction bonded SiC with high fracture strength was developed using Si melt infiltration method for use of the support layer in high temperature gas filter that is essential to develop the next generation power system such as integrated gasification combined cycle system. The porosity and pore size of porous RBSC developed in this study were in the range of 32∼36% and 37∼90 ${mu}m$ respectively and the maximum fracture strength of porous RBSC fabricated was 120 MPa. The fracture strength and thermal shock resistance of porous RBSC fabricated by Si melt infiltration were much improved compared to those of commercially available porous clay bonded SiC due to the formation of the strong SiC/Si interface between SiC particles. The characteristics of pore structure of porous RBSC was varied depending on the amounts of residual Si as Well as the size of SiC particle used in green body.
Key words: RBSC, Infiltration, Si, SiC
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