Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
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Thermal conductivity analysis of Al/graphite composite fabricated by a mechanical alloying

기계적 합금법에 의한 Al/graphite 복합체 제조 및 열전도도 특성 분석

  • Lee, Jung-Il (Department of Materials Science and Engineering, Korea National University of Transportation) ;
  • Kim, Tae Wan (Department of Materials Science and Engineering, Korea National University of Transportation) ;
  • Yoon, Yo Han (Department of Materials Science and Engineering, Korea National University of Transportation) ;
  • Cho, Hyun Su (Department of Materials Science and Engineering, Korea National University of Transportation) ;
  • Ryu, Jeong Ho (Department of Materials Science and Engineering, Korea National University of Transportation)
  • 이정일 (한국교통대학교 신소재공학과) ;
  • 김태완 (한국교통대학교 신소재공학과) ;
  • 윤요한 (한국교통대학교 신소재공학과) ;
  • 조현수 (한국교통대학교 신소재공학과) ;
  • 류정호 (한국교통대학교 신소재공학과)
  • Received : 2016.07.28
  • Accepted : 2016.08.12
  • Published : 2016.08.31
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Abstract

Thermal conductivity is a very important factor for applicability and reliability in electrical devices. In this study, Al/graphite composite is fabricated by a mechanical alloying and heat-treatment and its physical properties are characterized. The XRD peak intensity of the $Al_4C_3$ ceramic phase observed in the heat-treated Al/graphite composite increased with heat-treatment temperature and time. The thermal conductivity of the heat-treated Al/graphite composite sample was very lower than that of the pure Al sample, and increased with heat-treatment temperature and time.

전자소자내의 방열특성은 제품의 신뢰성을 결정하는 우주 중요한 인자중의 하나이다. 본 연구에서는 Al과 graphite 분말을 기계적 합금법(mechanical alloying)을 이용하여 Al/graphite 복합체 분말을 합성하고, 합성된 분말을 열처리한 시편에 대한 물리적 특성을 분석하였다. 열처리가 완료된 Al/graphite 샘플에서 열처리 온도 및 시간이 증가할수록 $Al_4C_3$ 이차상의 비율이 증가함을 확인하였다. 또한 Al/graphite 샘플의 열전도도는 순수 Al 분말 샘플에 비해 현저히 낮았으나, 열처리 온도와 시간에 비례하여 증가하는 것을 확인하였다.

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References

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