Effects of Carbon-coated SiC Whiskers on the Mechanical Properties of SiC Whisker Reinforced Silicon Nitride Ceramic Composite

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J. Korean Ceram. Soc. > Volume 36(10); 1999 > Article

Journal of the Korean Ceramic Society 1999;36(10): 1007.

SiC 휘스커 강화 질화규소 복합재료의 기계작 성질에 미치는 카본 코팅 SiC 휘스커의 영향

배인경, 이영규, 조원승, 최상욱, 장병국¹, 임실묵²

인하대학교 무기재료공학과
¹한국에너지 기술연구소
²한국산업기술대학교 재료금속공학과

Effects of Carbon-coated SiC Whiskers on the Mechanical Properties of SiC Whisker Reinforced Silicon Nitride Ceramic Composite

ABSTRACT

The Si3N4 composites reinforced with carbon-coated SiC whiskers were fabricated by hot-pressing at 180$0^{circ}C$ for 2 hours to examine the effects of carbon-coated whiskers on the mechanical properties of SiC whisker reinforced Si3N4 composites. The flexural strength of the Si3N4 composites and Si3N4 monolith respectively. The weak interfacial bond between carbon-coated SiC whiskers and Si3N4 matrix which enhances the crack deflection and whisker pull-out could contribute to the improvement of mechanical properties of the composites.

Key words: $S_i3N_4$ composite, Carbon-coated SiC whiskers, Interfacial, Interfacial bond, Fracture toughness, Crack deflection