Sun, H., Wan, S., Yi, G. et al. (6 more authors) (2024) Enhancing tribological performance of NiAl–Bi₂O₃–Cr₂O₃ composite coating via in-situ grown NiBi compound. Wear, 538-539. 205189. ISSN 0043-1648
Abstract
To provide a feasible solution for realizing low friction and wear on the surface of moving parts in a wide temperature range, we report a facile strategy to achieve the improved tribological capability of a NiAl–Bi₂O₃–Cr₂O₃ composite coating by applying heat treatment. The heat treatment delivers structural densification and compositional homogeneity of the coating while promoting the in-situ generation of a diffusely distributed intermetallic compound of nickel bismuth (NiBi). When performing rotational dry sliding tests against Al₂O₃ counterpart ball in air, the tribo-induced decomposition of the NiBi compound and the spontaneous interaction between NiBi and its oxidative environment lead to the formation of an amorphous yet deformable oxide surface, which is responsible for exceptional tribological properties in a wide temperature range. Particularly, the tribological performance is improved significantly from room temperature (RT) to 400 °C for the annealed samples compared to the non-annealed ones: The friction coefficient decreases by 23.6 % at RT and 27.9 % at 400 °C, and the wear rate decreases by 51.4 % at RT and 81.2 % at 400 °C. With these findings, we establish a general approach to the improvement of friction-reduction and anti-wear properties in cermet coatings.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Keywords: | Nickel matrix; Composite coating; Intermetallic compound; Nickel bismuth; Bi₂O₃; Tribology |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 13 Mar 2025 13:18 |
Last Modified: | 13 Mar 2025 13:18 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.wear.2023.205189 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:223502 |