Microstructural Characteristics and Thermal Expansion Coefficient of AlN-Cu Nanocomposite Materials Prepared by Solid State Processing

고상공정에 의해 제조된 AIN-Cu 나노복합재료의 조직 특성과 열팽창계수 측정에 관한 연구

  • Lee, Gwang-Min (Materals Science and Eng. Dept. Choinnam National Univ.) ;
  • Lee, Ji-Seong (Materals Science and Eng. Dept. Choinnam National Univ.) ;
  • Lee, Seung-Ik (Dept. of Materials Eng., Hanyang Univ.) ;
  • Kim, Ji-Sun (Dept. for Applied Materials Research) ;
  • Weissgaerber, T. (Dept. for Powder Metallurgy and Composite Materials) ;
  • Kieback, B. (Dept. for Powder Metallurgy and Composite Materials)
  • 이광민 (전남대학교 공과대학 신소재공학부) ;
  • 이지성 (전남대학교 공과대학 신소재공학부) ;
  • 이승익 (한양대학교 공과대학 재료공학부) ;
  • 김지순 (울산대학교 재료금속공학부) ;
  • ;
  • Published : 2001.10.01

Abstract

The present study was carried out to investigate the effect of MA processing variables on the microstructural properties of composite powders and the coefficient of thermal expansion of pulse electric current sintered AlN-Cu powder compacts. The AlN-Cu powders had a size of less than 15 $\mu\textrm{m}$ with 25 nm size of copper crystallite after MA 32 hours. The finely distributed AlN-Cu powder compacts were completely achieved after PECS. The residual oxygen was considerably removed after hydrogen reduction treatment. The residual carbon was completely removed to 97%. The CTE of AlN-Cu powder compacts showed a good consistency with Kingery-Tuner model when the volume fraction of copper was less than 60%. When it was more than 60%, the CTE had a good agreement with Series model.

Keywords

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