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Characteristics of alumina particles in dispersion-strengthened copper alloys

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Abstract

Two types of alumina dispersion-strengthened copper (ADSC) alloys were fabricated by a novel in-situ reactive synthesis (IRS) and a traditional internal oxidation (IO) process. The features of alumina dispersoids in these ADSC alloys were investigated by X-ray diffraction, scanning electron microscopy, and high-resolution transmission electron microscopy. It is found that nano-sized γ-Al2O3 particles of approximately 10 nm in diameter are homogeneously distributed in the IRS-ADSC composites. Meanwhile, larger-sized, mixed crystal structure alumina with rod-shaped morphology is embedded in the IO-ADSC alloy. The IRS-ADSC composites can obtain better mechanical and physical properties than the IO-ADSC composites; the tensile strength of the IRS-ADSC alloy can reach 570 MPa at room temperature, its electrical conductivity is 85% IACS, and the Rockwell hardness can reach 86 HRB.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China

    Xue-hui Zhang

  2. School of Metallurgical and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou, 341000, China

    Xiao-xian Li

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  1. Xue-hui Zhang
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  2. Xiao-xian Li
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Correspondence to Xue-hui Zhang.

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Zhang, Xh., Li, Xx. Characteristics of alumina particles in dispersion-strengthened copper alloys. Int J Miner Metall Mater 21, 1115–1119 (2014). https://doi.org/10.1007/s12613-014-1016-4

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  • DOI: https://doi.org/10.1007/s12613-014-1016-4

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