Processing and properties of copper dispersed alumina matrix nanocomposites

Sung Tag Oh, Mutsuo Sando, Tohru Sekino, Koichi Niihara

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

An optimum route to fabricate Al2O3/Cu composites with sound microstructure and desired mechanical properties was investigated. The Al2O3 matrix composites with Cu content of 2.5 to 10 vol.% were prepared by reduction and hot-pressing of Al2O3/CuO powder mixtures. Homogeneous microstructures with nanosized Cu dispersoids and improved fracture strength of 820 MPa could be achieved in the composites with Cu content of 2.5 and 5 vol.%. The influence of the Cu content upon the mechanical properties is discussed based on the observed microstructural characteristics. The toughness increase is explained by crack bridging. The strengthening is mainly attributed to the refinement of Al2O3 matrix grains by the nano-sized Cu dispersion.

Original languageEnglish
Pages (from-to)267-272
Number of pages6
JournalNanostructured Materials
Volume10
Issue number2-8
DOIs
Publication statusPublished - 1998 Feb

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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