Microstructure and properties of a wear resistant Al–25Si–4Cu–1Mg coating prepared by supersonic plasma spraying

Tian-shun Dong; Ming Liu; Yang Feng; Guo-lu Li; Xiao-bing Li

doi:10.1007/s12613-019-1950-2

Volume 27 Issue 9

Sep. 2020

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2020 > 27(9): 1287-1294

Tian-shun Dong, Ming Liu, Yang Feng, Guo-lu Li, and Xiao-bing Li, Microstructure and properties of a wear resistant Al–25Si–4Cu–1Mg coating prepared by supersonic plasma spraying, Int. J. Miner. Metall. Mater., 27(2020), No. 9, pp. 1287-1294. https://doi.org/10.1007/s12613-019-1950-2

Cite this article as:

Tian-shun Dong, Ming Liu, Yang Feng, Guo-lu Li, and Xiao-bing Li, Microstructure and properties of a wear resistant Al–25Si–4Cu–1Mg coating prepared by supersonic plasma spraying, Int. J. Miner. Metall. Mater., 27(2020), No. 9, pp. 1287-1294. https://doi.org/10.1007/s12613-019-1950-2

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Research Article

Microstructure and properties of a wear resistant Al–25Si–4Cu–1Mg coating prepared by supersonic plasma spraying

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Corresponding authors:
Ming Liu E-mail: hzaam@163.com

Guo-lu Li E-mail: liguolu0305@163.com
Received: 26 October 2019; Revised: 17 December 2019; Accepted: 20 December 2019; Available online: 3 June 2020

Abstract

Abstract

A high content silicon aluminum alloy (Al–25Si–4Cu–1Mg) coating was prepared on a 2A12 aluminum alloy by supersonic plasma spraying. The morphology and microstructure of the coating were observed and analyzed. The hardness, elastic modulus, and bonding strength of the coating were measured. The wear resistance of the coating and 2A12 aluminum alloy was studied by friction and wear test. The results indicated that the coating was compact and the porosity was only 1.5%. The phase of the coating was mainly composed of α-Al and β-Si as well as some hard particles (Al₉Si, Al_3.21Si_0.47, and CuAl₂). The average microhardness of the coating was HV 242, which was greater than that of 2A12 aluminum alloy (HV 110). The wear resistance of the coating was superior to 2A12 aluminum alloy. The wear mechanism of the 2A12 aluminum alloy was primarily adhesive wear, while that of the coating was primarily abrasive wear. Therefore, it is possible to prepare a high content silicon aluminum alloy coating with good wear resistance on an aluminum alloy by supersonic plasma spraying.
- coating;
- high silicon aluminum alloy;
- microstructure;
- mechanical properties;
- wear resistance

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