Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Effect of Cu content on Microstructure and Mechanical Properties of Al2O3/Cu Nanocomposites

Cu 첨가량이 Al2O3/Cu 나노복합재료의 미세조직과 기계적 성질에 미치는 영향

  • Oh Sung-Tag (Department of Materials Science and Engineering, Seoul National University of Technology) ;
  • Yoon Se-Joong (Department of Materials Science and Engineering, Seoul National University of Technology)
  • 오승탁 (서울산업대학교 신소재공학과) ;
  • 윤세중 (서울산업대학교 신소재공학과)
  • Published : 2006.01.01
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Abstract

The effect of Cu content on microstructure and mechanical properties of nano-sized Cu dispersed $Al_2O_3(Al_2O_3/Cu)$ nanocomposites was investigated. The nanocomposites with Cu content of 2.5 to 10 vol% were prepared by reduction and hot-pressing of $Al_2O_3/CuO$ powder mixtures. The nanocomposites with Cu content of 2.5 and 5vol% exhibited the maximum fracture strength of 820MPa and enhanced toughness compared with monolithic $Al_2O_3$. The strengthening was mainly attributed to the refinement of $Al_2O_3$ matrix grains. The toughening mechanism was discussed by the observed microstructural feature based on crack bridging.

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References

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