Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Effects of Porosity on the Properties of Pressureless Sintered $\beta$-SiC-$ZrB_2$ Electroconductive Ceramic Composites

무가압 소결법에 의한 $\beta$-SiC-$ZrB_2$편(偏) 도전성(導電性) 복합체(複合體) 미치는 기공(氣孔)의 영향

  • 주진영 (원광대학교 공과대학 전기공학과) ;
  • 권주성 (원광대학교 공과대학 전기공학과) ;
  • 신용덕 (원광대학교 공과대학 전기공학과)
  • Published : 1997.11.29
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Abstract

The effects of porosity on the pressureless sintered $\beta$-SiC-$ZrB_2$ composites with $Al_2O_3$ additions(4, 8, 12wt.%) under argon atmosphere were investigated. Relative density of $\beta$-SiC-$ZrB_2$ composites were decreased with the $Al_2O_3$ content. The relative density and fracture toughness of $\beta$-SiC-$ZrB_2$ with 4wt% $Al_2O_3$ are 93.2%, $1.323MPa{\cdot}m^{1/2}$ respectively. The Vicker's hardness and flexural strength of $\beta$-SiC-$ZrB_2$ with 12wt.% $Al_2O_3$ are 0.492GPa, 261MPa respectively. Fracture toughness of $\beta$-SiC-$ZrB_2$ composites are directly proportional to relative density.

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