(1. 兰州理工大学 有色金属先进加工与再利用国家重点实验室，兰州 730050；
2. 兰州工业学院 材料工程学院，兰州 730050)
摘 要: 利用冷空气动力喷涂(冷喷涂)工艺在45#钢基材上分别制备高铝青铜涂层、SrAl2O4掺杂和SiO2包覆SrAl2O4掺杂高铝青铜自敏发光复合涂层。采用SEM分析复合涂层表面、界面组织结构；采用HT-1000型高温摩擦磨损试验机对涂层进行常温干摩擦试验。研究SrAl2O4掺杂和SiO2包覆SrAl2O4掺杂分别对高铝青铜冷喷涂涂层沉积特性、显微组织以及摩擦磨损性能的影响，并检测了自敏发光复合涂层的宏观指示效应。结果表明：溶胶-凝胶法能够制备具有核-壳结构SiO2-SrAl2O4包覆粉体，形成的SiO2壳层结构较好地改善了粉体表面形貌，使得包覆粉体表面较为平整圆润，硬度增大；SiO2包覆SrAl2O4掺杂高铝青铜涂层表面平整，具有最优的摩擦磨损性能，发光指示效应较明显。
关键字: 冷喷涂；高铝青铜；铝酸锶；SiO2包覆；摩擦；磨损
（1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
2. School of Materials Engineering, Lanzhou Institute of Technology, Lanzhou 730050, China）
Abstract:High aluminum bronze(Cu-14Al-X) coating, SrAl2O4 doped and SiO2 coated SrAl2O4 doped high aluminum bronze self sensitized luminescence composite coatings were prepared on the 45# steel substrate by cold spraying technique. The surface and interface structure of the composite coatings were analyzed by SEM, and the dry friction test of the coatings was carried out by HT-1000 type high temperature friction and wear tester. Consequently, the effects of SrAl2O4 doping and SiO2 coated SrAl2O4 doping on the deposition characteristics, coating micro-structure and tribological properties of high aluminum bronze coating were investigated, and the macro indicator effect of the self sensitized luminescent composite coating was detected. The results indicate that the SiO2 shell structure prepared by sol-gel method can optimize the surface morphology of the SiO2-SrAl2O4 coating powders for more smooth and round shape, and increases the hardness of composite coating. The surface of SiO2 coated SrAl2O4 doped high aluminum bronze coating also has the best friction and wear properties, and the luminous indication effect is more obvious.
Key words: cold spray; high aluminum bronze; SrAl2O4; SiO2 encapsulation; friction; wear
