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Effect of particle size distribution and mixing homogeneity on microstructure and strength of alumina/copper composites

Authors
Journal
Nanostructured Materials
0965-9773
Publisher
Elsevier
Publication Date
Volume
10
Issue
2
Identifiers
DOI: 10.1016/s0965-9773(98)00072-5

Abstract

Abstract The powder mixtures of Al 2O 3/CuO with a variation in particle size distribution and mixing homogeneity were prepared using different milling process. The mixing homogeneity was quantitatively determined by the coefficient of variation. Homogeneous microstructure and a high fracture strength of the hot-pressed Al 2O 3/Cu composites could be achieved using the powder mixture with narrow size distribution and high mixing homogeneity. The relationship between mixing homogeneity and properties was discussed based on the role of unevenly dispersed second phase for the matrix grain growth and for the local variation of mechanical characteristics.

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