Wear behaviour of WC-Co HVOF coatings at different temperatures in air and argon

IMR OpenIR

	Wear behaviour of WC-Co HVOF coatings at different temperatures in air and argon
	Geng, Z.; Li, S.; Duan, D. L.; Liu, Y.; duandl@imr.ac.cn
	2015
发表期刊	WEAR
ISSN	0043-1648
卷号	330 页码:348-353
摘要	The wear behaviour of tungsten carbide-cobalt (WC-Co) high-velocity oxy-fuel coatings within the range of room temperature (RT) to 800 degrees C in air and RT to 650 degrees C in argon was studied using a ball-on-disc tribometer. The worn track morphologies, compositions and oxide phases after the tests were analysed by scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction analysis and Raman spectroscopy. The correlation between the oxidation and wear of WC-Co coatings was investigated. Results show that oxides, as well as the oxidation of coatings, have an important role during the tribological process of WC-Co coatings. The volume loss of WC-Co coatings in air is low at RT to 600 degrees C, which indicates that oxidation inhibits wear. Friction promotes the formation of CoWO4. CoWO4 can reduce friction and wear, and enables the coating to maintain good tribological properties even at 600 degrees C. Above 600 degrees C, the coating oxidises vigorously and its property deteriorates rapidly, which cause serious wear. In argon, the volume loss of WC-Co coating is significantly higher than that in air at RT to 600 C. Wear decreases as temperature rises because of the gradual formation of oxides. Consequently, WC-Co coatings should not be used as wearresistant coatings in 0-deficient environments at RT or at elevated temperatures. (C) 2015 Elsevier B.V. All rights reserved.
部门归属	[geng, z. ; li, s. ; duan, d. l. ; liu, y.] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [geng, z.] tsinghua univ, state key lab tribol, beijing 100084, peoples r china
关键词	Thermally Sprayed Wc-co Coating Wear Oxide Temperature
收录类别	sci
语种	英语
WOS记录号	WOS:000357438000037
引用统计	被引频次：73[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/75243
专题	中国科学院金属研究所
通讯作者	duandl@imr.ac.cn
推荐引用方式 GB/T 7714	Geng, Z.,Li, S.,Duan, D. L.,et al. Wear behaviour of WC-Co HVOF coatings at different temperatures in air and argon[J]. WEAR,2015,330:348-353.
APA	Geng, Z.,Li, S.,Duan, D. L.,Liu, Y.,&duandl@imr.ac.cn.(2015).Wear behaviour of WC-Co HVOF coatings at different temperatures in air and argon.WEAR,330,348-353.
MLA	Geng, Z.,et al."Wear behaviour of WC-Co HVOF coatings at different temperatures in air and argon".WEAR 330(2015):348-353.