International Journal of Minerals, Metallurgy and Materials ( IF 4.8 ) Pub Date : 2020-09-05 , DOI: 10.1007/s12613-019-1950-2 Tian-shun Dong , Ming Liu , Yang Feng , Guo-lu Li , Xiao-bing Li
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, Al3.21Si0.47, 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.
中文翻译:
超声等离子体喷涂制备的耐磨Al-25Si-4Cu-1Mg涂层的组织和性能
通过超声等离子体喷涂在2A12铝合金上制备了高含量的硅铝合金(Al-25Si-4Cu-1Mg)涂层。观察并分析了涂层的形态和微观结构。测量了涂层的硬度,弹性模量和粘合强度。通过摩擦磨损试验研究了涂层和2A12铝合金的耐磨性。结果表明,涂层致密,孔隙率仅为1.5%。涂层的相主要由α-Al和β-Si以及一些硬质颗粒(Al 9 Si,Al 3.21 Si 0.47和CuAl 2)。涂层的平均显微硬度为HV 242,高于2A12铝合金(HV 110)。涂层的耐磨性优于2A12铝合金。2A12铝合金的磨损机理主要是粘合剂磨损,而涂层的磨损机理主要是磨料磨损。因此,可以通过超声等离子体喷涂在铝合金上制备具有良好耐磨性的高含量硅铝合金涂层。