대한전기학회논문지:전기물성ㆍ응용부문C (The Transactions of the Korean Institute of Electrical Engineers C)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

Spray Dry한 $\beta$-SiC-Ti $B_2$ 도전성 세라믹 복합체의 특성에 미치는 Annealing 온도

Effect of Annealing Temperature on the Properties of $\beta$ -SiC-Ti $B_2$ Electrocondutive Ceramic Composites by Spray Dry

  • 신용덕 (원광대 전지전자 및 정보공학부) ;
  • 주진영 (원광대 전기공학과) ;
  • 최광수 (원광대 전기공학과) ;
  • 오상수 (원광대 전기공학과) ;
  • 서재호 (원광대 전지전자 및 정보공학부)
  • 발행 : 2003.08.01
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초록

The composites were fabricated respectively 61vo1.% $\beta$ -SiC and 39vo1.% Ti $B_2$ spray-dried powders with the liquid forming additives of l2wt% $Al_2$ $O_3$＋ $Y_2$ $O_3$ by pressureless annealing at 1$700^{\circ}C$, 175$0^{\circ}C$, 180$0^{\circ}C$ for 4 hours. The result of phase analysis of composites by XRD revealed $\alpha$ -SiC(6H), Ti $B_2$, and YAG(A $l_{5}$ $Y_3$ $O_{12}$ ) crystal phase. The relative density, the Young's modulus and fracture toughness showed respectively the highest value of 92.97%, 92.88Gpa and 4.4Mpaㆍ $m^{\frac{1}{2}}$ for composites by pressureless annealing temperature 1$700^{\circ}C$ at room temperature. The electrical resistivity showed the lowest value of 8.09${\times}$10$^{-3}$ ㆍcm for composite by pressureless annealing temperature 1$700^{\circ}C$ at $25^{\circ}C$. The electrical resistivity of the SiC-Ti $B_2$ composites was all positive temperature cofficient resistance(PTCR) in the temperature ranges from $25^{\circ}C$ to $700^{\circ}C$.

키워드

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