Effect of Cold Spraying Temperature on the Microstructure and Tribological Properties of Cu-Ti3AlC2 Composite Coatings
WANG Huipeng1, LI Peng1, WANG Ximao1, GUO Weiling2,*, MA Guozheng2,*, WANG Haidou2,3
1 School of Mechanical and Electrical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China 2 National Key Laboratory of Remanufacturing, Army Academy of Armored Force, Beijing 100072, China 3 National Engineering Research Centerfor Remanufacturing, Army Academy of Armored Force, Beijing 100072, China
Abstract: To improve the tribological properties of copper alloy moving part surfaces, Cu-Ti3AlC2 composite coatings were prepared on copper alloy substrates by cold spraying technique, and the effect of spraying temperature on the microstructure and properties of the coatings was investigated. The surface and cross-sectional microstructures of the coatings were characterized using scanning electron microscopy (SEM) and X-ray diffractometer (XRD), and the bond strength, microhardness and tribological properties of the coatings were tested using an electronic universal testing machine, a nanoindentation tester and a reciprocating friction tester. It was found that as the spraying temperature increased from 600 ℃ to 800 ℃, the deformation of particles inside the Cu-Ti3AlC2 composite coating increased, the interparticle bonding state improved significantly, the bond strength increased by about 4 times, the porosity decreased by 23%, the hardness increased by 71%, and the coating wear rate decreased by 53%. The Cu-Ti3AlC2 composite coating prepared at 800 ℃ showed the optimal frictional wear performance, and the wear mechanism was specifically analyzed. The results showed that the denseness, mechanical properties and wear resistance of the coatings could be effectively improved by appropriately increasing the spraying temperature.
王慧鹏, 李鹏, 王喜茂, 郭伟玲, 马国政, 王海斗. 冷喷涂温度对Cu-Ti3AlC2复合涂层微观组织及摩擦学性能的影响[J]. 材料导报, 2024, 38(15): 23030288-9.
WANG Huipeng, LI Peng, WANG Ximao, GUO Weiling, MA Guozheng, WANG Haidou. Effect of Cold Spraying Temperature on the Microstructure and Tribological Properties of Cu-Ti3AlC2 Composite Coatings. Materials Reports, 2024, 38(15): 23030288-9.
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2024, Vol. 38 
