Paper Title:
Fabrication of Al2O3/5 vol% Cu Nanocomposites Using Various Powder Mixtures and Its Properties
  Abstract

An optimum route to fabricate the Al2O3/Cu nanocomposites with sound microstructure and improved mechanical properties was investigated. Three powder mixtures of Al2O3 and Cu, CuO or Cu-nitrate were used to obtain Al2O3/5 vol% Cu composites. Microstructural investigations for the composite from Al2O3/Cu-nitrate showed that fine Cu particles, about 150 nm in diameter, were homogeneously distributed within the Al2O3 matrix grains and at the grain boundaries. Fracture toughness of 4.8 MPam and strength of 953 MPa were measured for the Al2O3/5 vol% Cu nanocomposites prepared from Al2O3/Cu-nitrate mixture. The toughening and strengthening of the composites are explained by the crack bridging/deflection and the refinement of the microstructure, respectively.

  Info
Periodical
Materials Science Forum (Volumes 449-452)
Edited by
S.-G. Kang and T. Kobayashi
Pages
1213-1216
DOI
10.4028/www.scientific.net/MSF.449-452.1213
Citation
S. T. Oh, Y. H. Choa, Y. D. Kim, "Fabrication of Al2O3/5 vol% Cu Nanocomposites Using Various Powder Mixtures and Its Properties ", Materials Science Forum, Vols. 449-452, pp. 1213-1216, 2004
Online since
March 2004
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$32.00
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