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Effect of W Particle Size on the Electrical and Thermal Conductivity of W-Cu Composites

W 입자크기가 W-Cu 복합재료의 전기 및 열전도도에 미치는 영향

  • 양주환 (한양대학교 재료공학과) ;
  • 오승탁 (서울산업대학교 신소재공학과) ;
  • 박상우 (한양대학교 재료공학과) ;
  • 문인형 (한양대학교 재료공학과)
  • Published : 2004.02.01

Abstract

The electrical and thermal conductivity of W-Cu composites were investigated as a function of the W-particle size and W-W contiguity. Powder mixtures were prepared by ball milling or mechanical alloying process, and then sintered at various temperatures. The electrical conductivity of sintered composite was increased with decreasing W grain size. Dependence of electrical conductivity on the W grain size was explained by the W-W contiguity concept. The thermal conductivity was increased with increasing the temperature up to $600^{\circ}C$ but decreased at the temperature above $600^{\circ}C$ Also, thermal conductivity value was influenced by the W particle size. Change of thermal conductivity in W-Cu composites was discussed based on the observed microstructural characteristics and theoretical considerations.

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