纯铜表面Ta-W合金层的抗高温氧化及摩擦行为

doi:10.11896/cldb.22050017

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Abstract In this study,the Ta-W coating was prepared by adding a transition layer of tantalum on the surface of pure copper using double glow plasma surface alloying technology. The oxidation property of copper matrix and Ta-W coating was analyzed by isothermal oxidation test at 400 ℃. The nano-hardness and high temperature wear resistance of Ta-W coating were carried out by using nano-indentation tester and friction wear tester,respectively. The results show that the Ta-W coating exhibits the cellular,compact and homogeneous structure,with the thicknesses of about 13 μm. The element content of each layer presents a gradient distribution,which leads to good interface bonding,and the main phase of the coating is single α-W. After isothermal oxidation for 50 h at 400 ℃,the oxidation mass gain of pure copper was 13.9 mg/cm²,and that of Ta-W coating was 4.6 mg/cm²,about 33.1% of the matrix. The continuous,dense and non-defective oxide film of Ta-W coating is composed of W₁₈O₄₉ and WO₃,and the film completely covers the matrix, which could effectively prevent the oxygen into the substrate and significantly improve the oxidation performance. As compared with pure copper substrate,the nano-hardness of the Ta-W coating was significantly increased, from 1.07 GPa to 11.99 GPa. The average friction coefficient of Ta-W coating had a little change,but the fluctuation range of friction coefficient decreased significantly. The specific wear rate decreased from 13.77×10^-4 mm³/(N·m) to 7.24×10^-4 mm³/(N·m),which corresponded to an improvement of wear resistance. The wear mechanism of the substrate is mainly the combination of adhesion wear,oxidation wear and abrasive wear,while the Ta-W coating shows slight abrasive wear.

Key words： double glow plasma surface alloying technology Ta-W coating microstructure high temperature oxidation wear resistance property

Published: Online: 2022-12-09

CLC number:

TG147

Fund:Science and Technology on Particle Transport and Separation Key National Defense Laboratory (SYSJJ-22301).

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	Articles by authors
	LYU Xuming
	JIANG Tao
	ZHANG Yunhan
	YUAN Jianzhi
	YANG Kai
	DANG Bo
	ZHANG Pingze

Cite this article:

LYU Xuming,JIANG Tao,ZHANG Yunhan, et al. High Temperature Oxidation Resistance and Wear Property of Ta-W Coating on Pure Copper[J]. Materials Reports, 2022, 36(23): 22050017-5.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22050017 OR http://www.mater-rep.com/EN/Y2022/V36/I23/22050017

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