Influence of pulse frequency on microstructure and mechanical properties of Al-Ti-V-Cu-N coatings deposited by HIPIMS

MEI, Haijuan, DING, Ji Cheng, XIAO, Xiaolan, LUO, Quanshun, WANG, Rui, ZHANG, Quan, GONG, Weiping and WANG, Qimin (2020). Influence of pulse frequency on microstructure and mechanical properties of Al-Ti-V-Cu-N coatings deposited by HIPIMS. Surface and Coatings Technology.

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Official URL: https://www.sciencedirect.com/science/article/pii/...
Link to published version:: https://doi.org/10.1016/j.surfcoat.2020.126514
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    Abstract

    As an important parameter of HIPIMS, pulse frequency has significant influence on the microstructure and mechanical properties of the deposited coatings, especially for the multi-component coatings deposited by using a spliced target with different metal sputtering yields. In this study, a single Al67Ti33-V-Cu spliced target was designed to prepare Al-Ti-V-Cu-N coatings by using high power impulse magnetron sputtering (HIPIMS). The results showed that the peak target current density decreased from 0.75 to 0.24 A∙cm−2 as the pulse frequency increased, along with the microstructure transferred from dense structure to coarse column structure. The pulse frequency has significant influence on chemical compositions of Al-Ti-V-Cu-N coatings, especially for Cu content increasing from 6.2 to 11.7 at.%. All the coatings exhibited a single solid-solution phase of Ti-Al-V-N, and the preferred orientation changed from (111) to (220) when the pulse frequency increased above 200 Hz. The decrease in peak target current density at high pulse frequencies resulted in a sharp decrease in the coating hardness from 35.2 to 16.4 GPa, whereas the relaxation of compressive residual stress contributed to an improvement in adhesion strength from 43.3 to 79.6 N.

    Item Type: Article
    Uncontrolled Keywords: Applied Physics; 0204 Condensed Matter Physics; 0306 Physical Chemistry (incl. Structural); 0912 Materials Engineering
    Identification Number: https://doi.org/10.1016/j.surfcoat.2020.126514
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 23 Oct 2020 12:18
    Last Modified: 03 Nov 2020 15:52
    URI: http://shura.shu.ac.uk/id/eprint/27492

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