Effect of Charge Voltage on the Microstructural, Mechanical, and Tribological Properties of Mo−Cu−V−N Nanocomposite Coatings

MEI, Haijuan, DING, Jicheng, ZHAO, Junfeng, WANG, Ting, HUANG, Kaijian, GUO, Zhaohui, LUO, Quanshun and GONG, Weiping (2021). Effect of Charge Voltage on the Microstructural, Mechanical, and Tribological Properties of Mo−Cu−V−N Nanocomposite Coatings. Coatings, 11 (12).

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Official URL: https://www.mdpi.com/2079-6412/11/12/1565
Open Access URL: https://www.mdpi.com/2079-6412/11/12/1565/pdf (Published version)
Link to published version:: https://doi.org/10.3390/coatings11121565
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    Abstract

    As an important high-power impulse magnetron sputtering (HIPIMS) parameter, charge voltage has a significant influence on the microstructure and properties of hard coatings. In this work, the Mo−Cu−V−N coatings were prepared at various charge voltages using HIPIMS technique to study their mechanical and tribological properties. The microstructure was analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD), and transmission electron microscopy (TEM). The mechanical and tribological properties were investigated by nano-indentation and ball-on-disc tribometer. The results revealed that all the coatings showed a solid-solution phase of B1-MoVN, the V atoms dissolved into face-centered cubic (FCC) B1-MoN lattice by partial substitution of Mo, and formed a solid-solution phase. Even at a high Cu content (~8.8 at. %), the Cu atoms existed as an amorphous phase. When the charge voltage increased, more energy was put into discharge, and the microstructure changed from coarse structure into dense columnar structure, resulting in the highest hardness of 28.2 GPa at 700 V. An excellent wear performance with low friction coefficient of 0.32 and wear rate of 6.3 × 10−17 m3/N·m was achieved at 750 V, and the wear mechanism was dominated by mild abrasive and tribo-oxidation wear.

    Item Type: Article
    Additional Information: ** From MDPI via Jisc Publications Router ** Licence for this article: https://creativecommons.org/licenses/by/4.0/ **Journal IDs: eissn 2079-6412 **History: published 20-12-2021; accepted 10-12-2021
    Uncontrolled Keywords: Mo–Cu–V–N, charge voltage, microstructure, mechanical properties
    Identification Number: https://doi.org/10.3390/coatings11121565
    SWORD Depositor: Colin Knott
    Depositing User: Colin Knott
    Date Deposited: 05 Jan 2022 16:52
    Last Modified: 05 Jan 2022 17:00
    URI: http://shura.shu.ac.uk/id/eprint/29490

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