Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Properties of $\beta$-SiC-$TiB_2$ Composites by Annealing

Annealing에 따른 $\beta$-SiC-$TiB_2$ 복합체의 특성

  • Yim, Seung-Hyuk (School of Electrical and Computer Engineering, Sung Kyun Kwan Univ.) ;
  • Song, Joon-Tae (School of Electrical and Computer Engineering, Sung Kyun Kwan Univ.) ;
  • Park, Mi-Lim (School of Electrical and Electronic Engineering, Wonkwang. Univ.) ;
  • Ju, Jin-Young (School of Electrical and Electronic Engineering, Wonkwang. Univ.) ;
  • Shin, Yong-Deok (School of Electrical and Electronic Engineering, Wonkwang. Univ.)
  • 임승혁 (성균관대학교 공과대학 전기전자 및 컴퓨터공학부) ;
  • 송준태 (성균관대학교 공과대학 전기전자 및 컴퓨터공학부) ;
  • 박미림 (원광대학교 공과대학 전기전자공학부) ;
  • 주진영 (원광대학교 공과대학 전기전자공학부) ;
  • 신용덕 (원광대학교 공과대학 전기전자공학부)
  • Published : 2000.07.17
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Abstract

The mechanical and electrical properties of the hot-pressed and annealed $\beta$-SiC-$TiB_2$ electroconductive ceramic composites were investigated as function of the liquid forming additives of $Al_{2}O_{3}+Y_{2}O_3$ and the annealing method. Phase analysis of composites by XRD revealed $\alpha$-SiC(6H), $TiB_2$, and YAG($Al_{5}Y_{3}O_{12}$). In pressureless annealing method, the relative density and the mechanical properties of composites were increased with increasing $Al_{2}O_{3}+Y_{2}O_3$ contents because YAG of reaction between $Al_{2}O_3$ and $Y_{2}O_3$ was increased. But In pressured annealing method, reaction between $Al_{2}O_3$ and $Y_{2}O_3$ formed YAG but the relative density decreased with increasing $Al_{2}O_{3}+Y_{2}O_3$ contents. The electrical resistivity of the composites was all positive temperature coefficient resistance (PTCR) in the temperature range of 25$^{\circ}C$ to 700$^{\circ}C$.

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