Role of atomic layer deposited TiOxNy interlayer in tribological and corrosion properties of CrN coating

The growth defects in the sputtered CrN coatings can worsen their tribological and corrosion properties. To improve the above deficiency, the atomic layer deposited TiN was deposited on the sputtered CrN layer, oxidized and then again coated by CrN to form the sandwich-structured CrN/TiOxNy/CrN comp...

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Bibliographic Details
Published in:Surface & coatings technology 2022-01, Vol.429, p.127981, Article 127981
Main Authors: Kong, Ji-Zhou, Zhai, Qing-Wei, Shen, Jun-Jie, Sun, Xin-Yu, Cao, Yan-Qiang, Xuan, Yan, Li, Ai-Dong, Wang, Qian-Zhi, Zhou, Fei
Format: Article
Language:English
Subjects:
Adhesive strength
Coatings
Coefficient of friction
Corrosion
Corrosion resistance
Corrosive wear
CrN hard coating
Crystal defects
Crystal structure
Grain refinement
Interlayers
Mechanical properties
Oxidation
Preferred orientation
Synergistic effect
Thickness
TiOxNy interlayer
Tribology
Wear
Wear rate
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Summary:The growth defects in the sputtered CrN coatings can worsen their tribological and corrosion properties. To improve the above deficiency, the atomic layer deposited TiN was deposited on the sputtered CrN layer, oxidized and then again coated by CrN to form the sandwich-structured CrN/TiOxNy/CrN composite coating. The insertion of the TiOxNy interlayer resulted in (111) preferred orientation and the grain refinement of CrN crystals, leading to the improvement in its mechanical performance and corrosion resistance. As the thickness of the TiOxNy layer increased, the mechanical and corrosion properties of the composite coatings were further improved. The composite coating inserted with a 30 nm-thick TiOxNy interlayer delivered the greatest corrosion resistance, the lowest friction coefficient and wear rate as well as high hardness and adhesion strength, which could be attributed to the synergistic effect of the multilayered TiOxNy interlayer. [Display omitted] •Atomic layer deposited TiN interlayer is inserted into CrN hard coating.•The oxidization of TiN results in a multilayer-structured TiOxNy interlayer.•Synergistic effect of the interlayers improves the tribological properties of CrN.•Corrosion resistance of CrN is also enhanced by inserting the TiNxOy interlayer.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2021.127981