Microstructure and properties of a wear resistant Al–25Si–4Cu–1Mg coating prepared by supersonic plasma spraying
来源期刊：International Journal of Minerals Metallurgy and Materials2020年第9期
论文作者：Tian-shun Dong Ming Liu Yang Feng Guo-lu Li Xiao-bing Li
文章页码：1287 - 1294
摘 要：A high content silicon aluminum alloy（Al–25Si–4 Cu–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,Al3.21Si0.47, and CuAl2). The average microhardness of the coating was HV 242, which was greater than that of 2 A12 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.
Tian-shun Dong1,2，Ming Liu3，Yang Feng1，Guo-lu Li1，Xiao-bing Li1
1. School of Materials Science and Engineering,Hebei University of Technology2. Key Laboratory for New Type of Function Material in Hebei Province,Hebei University of Technology3. National Key Laboratory for Remanufacturing,Academy of Armored Forces Engineering
摘 要：A high content silicon aluminum alloy（Al–25Si–4 Cu–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,Al3.21Si0.47, and CuAl2). The average microhardness of the coating was HV 242, which was greater than that of 2 A12 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.
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