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Cu 첨가량이 Al2O3/Cu 나노복합재료의 미세조직과 기계적 성질에 미치는 영향

Effect of Cu content on Microstructure and Mechanical Properties of Al2O3/Cu Nanocomposites

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참고문헌

주제분류금속공학

초록

Abstract

The effect of Cu content on microstructure and mechanical properties of nano-sized Cu dispersed Al2O3 (Al2O3/Cu) nanocomposites was investigated. The nanocomposites with Cu content of 2.5 to 10 vol% were prepared by reduction and hot-pressing of Al2O3/CuO powder mixtures. The nanocomposites with Cu content of 2.5 and 5 vol% exhibited the maximum fracture strength of 820 MPa and enhanced toughness compared with monolithic Al2O3. The strengthening was mainly attributed to the refinement of Al2O3 matrix grains. The toughening mechanism was discussed by the observed microstructural feature based on crack bridging.

참고문헌 (3)

  1. "Liquid Phase Sintering", pp.132~ (1985), Plenum Press
  2. "Metals Reference Book" (1976), Butterworths
  3. "Introduction to Ceramics", pp.765~ (1976), John Wiley and Sons

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