(1. 蘭州理工大學(xué) 有色金屬先進加工與再利用國家重點實驗室，蘭州 730050；
2. 蘭州工業(yè)學(xué)院 材料工程學(xué)院，蘭州 730050)
摘 要: 利用冷空氣動力噴涂(冷噴涂)工藝在45#鋼基材上分別制備高鋁青銅涂層、SrAl2O4摻雜和SiO2包覆SrAl2O4摻雜高鋁青銅自敏發(fā)光復(fù)合涂層。采用SEM分析復(fù)合涂層表面、界面組織結(jié)構(gòu)；采用HT-1000型高溫摩擦磨損試驗機對涂層進行常溫干摩擦試驗。研究SrAl2O4摻雜和SiO2包覆SrAl2O4摻雜分別對高鋁青銅冷噴涂涂層沉積特性、顯微組織以及摩擦磨損性能的影響，并檢測了自敏發(fā)光復(fù)合涂層的宏觀指示效應(yīng)。結(jié)果表明：溶膠-凝膠法能夠制備具有核-殼結(jié)構(gòu)SiO2-SrAl2O4包覆粉體，形成的SiO2殼層結(jié)構(gòu)較好地改善了粉體表面形貌，使得包覆粉體表面較為平整圓潤，硬度增大；SiO2包覆SrAl2O4摻雜高鋁青銅涂層表面平整，具有最優(yōu)的摩擦磨損性能，發(fā)光指示效應(yīng)較明顯。
關(guān)鍵字: 冷噴涂；高鋁青銅；鋁酸鍶；SiO2包覆；摩擦；磨損
（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
