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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
Source PublicationWEAR
ISSN0043-1648
Volume330Pages:348-353
AbstractThe 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.
description.department[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
KeywordThermally Sprayed Wc-co Coating Wear Oxide Temperature
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75243
Collection中国科学院金属研究所
Corresponding Authorduandl@imr.ac.cn
Recommended Citation
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.
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