Influence of lubricious oxides formation on the tribological behavior of Mo-V-Cu-N coatings deposited by HIPIMS

MEI, Haijuan, LUO, Quanshun, HUANG, Xueli, DING, Ji Cheng, ZHANG, Teng Fei and WANG, Qimin (2018). Influence of lubricious oxides formation on the tribological behavior of Mo-V-Cu-N coatings deposited by HIPIMS. Surface and Coatings Technology, 358, 947-957.

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Official URL: https://www.sciencedirect.com/science/article/pii/...
Link to published version:: https://doi.org/10.1016/j.surfcoat.2018.12.033
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    Abstract

    The variations of microstructure, mechanical properties, and oxidation behavior of Mo-V-Cu-N coatings are directly correlated to the chemical compositions, which significantly affects their tribological behavior. The aim of this work was to characterize Mo-V-Cu-N coatings with different chemical compositions deposited by high power impulse magnetron sputtering (HIPIMS) using single Mo-V-Cu segmental target, and to investigate the correlations between the lubricative oxides formed on coating surfaces with the variation of tribological behavior at different temperatures. The oxidation of Mo-V-Cu-N coatings started at 400 °C with the lubrication oxides of Mo-O and Cu-Mo-O were formed, which led to the decrease in coefficients of friction and wear rates of the coatings. It was found that the rapid outward diffusion of Mo and Cu atoms took place preferentially at around the growth defects (e.g. microparticles and pores). The incorporation of V atoms into Mo-Cu-N coatings enhanced the oxidation resistance at temperatures below 400 °C. At 500 °C, all the fcc B1-MoN and VN phases disappeared due to the severe oxidation, and the V2O5 phase was first appeared. Even though a relatively low coefficient of friction was obtained at 500 °C, the wear resistance of Mo-V-Cu-N coatings was decreased due to the severe oxidation and loss of mechanical strength.

    Item Type: Article
    Uncontrolled Keywords: 0306 Physical Chemistry (Incl. Structural); 0912 Materials Engineering; 0204 Condensed Matter Physics; Applied Physics
    Identification Number: https://doi.org/10.1016/j.surfcoat.2018.12.033
    Page Range: 947-957
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 04 Feb 2019 16:08
    Last Modified: 11 Dec 2019 01:18
    URI: http://shura.shu.ac.uk/id/eprint/23672

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