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Abstract

In order to improve the in situ oxidation kinetic condition of Al in Cu matrix, Cr, instead of Al was in situ oxidized to form Cu/Cr₂O₃ composites in the present investigation, Cu-Cr powders with different solubilities after mechanical activation were utilized to synthesize Cu/Cr₂O₃ composites, and their microstructure and stability were analyzed. The results show that although the Cu-Cr powders suffer from the same mechanical activation; Cr₂O₃ particles formed by the powders with different solubilities have great differences in size, amount, and distribution. In the range of experiments, the Cu/Cr₂O₃ composite formed by Cu-Cr powders with 67% solution has large amounts of finer Cr₂O₃ particles uniformly distributed in Cu matrix and the best stability at elevated temperatures.

Keywords

Cu/Cr2O3 composite mechanical activation in situ oxidation solubility high-temperature stability.

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Preparation of Cu/Cr2O3 Composites by Mechanical Activation and In Situ Oxidation

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