Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Thermal Properties according to Content and Alignment of Carbon Fiber in Cu Matrix Composite Reinforced with Chopped Carbon Fiber

탄소 단섬유가 첨가된 Cu기지 복합재료의 섬유 분율 및 배열에 따른 열적 특성

  • Kim, Minkyoung (Department of Materials Science and Engineering, Chungnam National University) ;
  • Han, Jun Hyun (Department of Materials Science and Engineering, Chungnam National University)
  • 김민경 (충남대학교 신소재공학과) ;
  • 한준현 (충남대학교 신소재공학과)
  • Received : 2021.09.29
  • Accepted : 2021.10.19
  • Published : 2021.11.27
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Abstract

Cu matrix composites reinforced with chopped carbon fiber (CF), which is cost effective and can be well dispersed, are fabricated using electroless plating and hot pressing, and the effects of content and alignment of CF on the thermal properties of CF/Cu composites are studied. Thermal conductivity of CF/Cu composite increases with CF content in the in-plane direction, but it decreases above 10% CF; this is due to reduction of thermal diffusivity related with phonon scattering by agglomeration of CF. The coefficient of thermal expansion decreases in the in-plane direction and increases in the through-plane direction as the CF content increases. This is because the coefficient of thermal expansion of the long axis of CF is smaller than that of the Cu matrix, and the coefficient of thermal expansion of its short axis is larger than that of the Cu matrix. The thermal conductivity is greatly influenced by the agglomeration of CF in the CF/Cu composite, whereas the coefficient of thermal expansion is more influenced by the alignment of CF than the aggregation of CF.

Keywords

Acknowledgement

This work was supported by research fund of Chungnam National University.

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