Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Bending Strength and Crack Healing of SiCf/SiC Composite Material

SiCf/SiC 복합재료의 굽힘 강도 특성 및 균열 치유 효과

  • Ahn, Seok-Hwan (Industry-University Cooperation, Pukyong National University) ;
  • Do, Jae-Yoon (Busan Campus of Korea Polytechnic VII) ;
  • Moon, Chang-Kwon (Materials Science and Engineering, Pukyong National University) ;
  • Nam, Ki-Woo (Materials Science and Engineering, Pukyong National University)
  • 안석환 (부경대학교 링크사업단) ;
  • 도재윤 (한국폴리텍대학 부산캠퍼스) ;
  • 문창권 (부경대학교 재료공학과) ;
  • 남기우 (부경대학교 재료공학과)
  • Received : 2013.03.27
  • Accepted : 2013.07.05
  • Published : 2013.08.31
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Abstract

Manufactured $SiC_f/SiC$ composites by NITE method was investigated fracture characteristics according to the size of the surface crack. Coated surface crack with a $SiO_2$ colloid in several ways was evaluating the possibility of healing. The strength of CCS and UCS is 313 and 230MPa, respectively and it is about 1/3 of the SPS. Bending strength of $SiC_f/SiC$ composites has no effect with the pre-crack size to the critical crack size. $SiC_f/SiC$ composites can not generate large amount of $SiO_2$ oxides to the bottom of crack, and is only generated randomly on surfaces, and can not contribute to the recovery of bending strength.

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References

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