High-temperature tribological behavior of a NiCoCrAlY/ZrO2 duplex coating on γ-TiAl alloy. (19th June 2019)

• Record Type: Journal Article
• Authors: Ding, Zheng; Miao, Qiang; Liang, Wenping; Yang, Zhengang; An, Hao; Yi, Jinwei; Lin, Hao
• Is Part Of: Materials research express. Volume 6:Number 8(2019)
• Publication Date: 2019-06-19
• Subjects: NiCoCrAlY/ZrO2 duplex coating -- high temperature -- γ-TiAl alloy -- friction coefficient -- wear mechanism; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ab28f8
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: A dense NiCoCrAlY/ZrO2 duplex coating was deposited onto the γ -TiAl alloy by magnetron sputtering technology for the purpose of improving its friction and wear properties at high temperature. Some tests of the ball-on-disk type that were against Si3 N4 counterpart, were performed at room temperature and 500 °C. The average friction coefficients as well as the wear rates of NiCoCrAlY/ZrO2 duplex coatings were greatly less than those of substrates at both temperatures. Besides, the H/E and H 3 /E 2 value of the NiCoCrAlY/ZrO2 coatings were much higher than that of the substrate. The excellent wear-resisting property of NiCoCrAlY/ZrO2 duplex coating was caused by the synergistic effect of its high hardness and outstanding plastic-deformation resistance.