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J. Korean Ceram. Soc. > Volume 46(5); 2009 > Article
Journal of the Korean Ceramic Society 2009;46(5): 484.
doi: https://doi.org/10.4191/kcers.2009.46.5.484
Whisker Growing Assisted 화학침착 공정으로 제조된 SiCf/SiC 복합체의 파괴거동과 기계강도 평가
강석민, 김원주, 윤순길1, 박지연
한국원자력연구원 원자력재료연구부
1충남대학교 재료공학과
Fracture Behaviors and Mechanical Properties of SiCf/SiC Composites Prepared by the Whisker Growing Assisted CVI Process
Seok-Min Kang, Weon-Ju Kim, Soon-Gil Yoon1, Ji-Yeon Park
Nuclear Materials Research Division, Korea Atomic Energy Research Institute
1Department of Materials Engineering, Chungnam National University
ABSTRACT
$SiC_f$/SiC composites with whiskers and pyrolytic carbon (PyC) coated whiskers in the matrix were fabricated for enhancement of the fracture behaviors by the whisker growing assisted chemical vapor infiltration (WA-CVI) process, respectively. $SiC_f$/SiC composites were also prepared by the conventional CVI process as reference material. The mechanical properties and fracture behaviors were analyzed by comparison of the two types of composites prepared by WA-CVI and conventional CVI. The densities of $SiC_f$/SiC composites were in the range of $2.6{sim}2.65g/cm^3$. The flexural strengths of composite with whiskers and with those coated by PyC were 650 MPa and 600 MPa, respectively. The tensile strength of composites with whiskers was ${sim}285$ MPa.
Key words: $SiC_f$/SiC composite, Chemical vapor infiltration, Whisker, PyC, Fracture behaviors, Mechanical property
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