冷喷涂温度对Cu-Ti<sub>3</sub>AlC<sub>2</sub>复合涂层微观组织及摩擦学性能的影响

doi:10.11896/cldb.23030288

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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.

Key words： cold spraying copper-based ceramic composite coating microstructure mechanical property tribological property

Published: 10 August 2024 Online: 2024-08-29

CLC number:

TG174.442

Fund:National Natural Science Foundation of China (52005511,52122508, 52130509), Key Project of 145 Project (ZD-302), and the 2022 Jiangxi Postgraduate Innovation Special Fund Project (YC2022-S672).

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	Articles by authors
	WANG Huipeng
	LI Peng
	WANG Ximao
	GUO Weiling
	MA Guozheng
	WANG Haidou

Cite this article:

WANG Huipeng,LI Peng,WANG Ximao, et al. Effect of Cold Spraying Temperature on the Microstructure and Tribological Properties of Cu-Ti₃AlC₂ Composite Coatings[J]. Materials Reports, 2024, 38(15): 23030288-9.

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http://www.mater-rep.com/EN/10.11896/cldb.23030288 OR http://www.mater-rep.com/EN/Y2024/V38/I15/23030288

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