Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites

Liu, Changxia; Sun, Junlong; Venturi, Federico; Romero, Acacio Rincon; Hussain, Tanvir

Abstract

The incorporation of graphene-based nanodispersoids in ceramic coatings is known to enhance the wear behavior of these materials. In this study, for the first time, alumina/graphene nanoplatelets (GNPs) coatings were deposited through Suspension High Velocity Oxy-Fuel (SHVOF) thermal spray on Al2O3/TiC substrate composites, which were laser microtextured with grid and line surface patterns. Dense coatings with around 8−10 μm thickness were obtained by spraying alumina suspension containing 1 wt. % GNPs. The tribological performance of the alumina/GNPs coatings on the Al2O3/TiC substrate composites was evaluated using ball-on-disc sliding wear tests. The alumina/GNPs coated Al2O3/TiC substrate composites textured with grid pattern showed the best tribological performance reaching a steady coefficient of friction (CoF) at lower sliding distances and presenting the lowest wear rate of the Al2O3/TiC substrate composites and the counterbody.

Citation

Liu, C., Sun, J., Venturi, F., Romero, A. R., & Hussain, T. (2021). Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites. Journal of the European Ceramic Society, 41(2), 1438-1451. https://doi.org/10.1016/j.jeurceramsoc.2020.09.063

• Journal Article Type: Article
• Acceptance Date: Sep 26, 2020
• Online Publication Date: Sep 29, 2020
• Publication Date: Feb 1, 2021
• Deposit Date: Apr 19, 2021
• Publicly Available Date: Sep 30, 2021
• Journal: Journal of the European Ceramic Society
• Print ISSN: 0955-2219
• Electronic ISSN: 1873-619X
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 41
• Issue: 2
• Pages: 1438-1451
• DOI: https://doi.org/10.1016/j.jeurceramsoc.2020.09.063
• Keywords: Materials Chemistry; Ceramics and Composites
• Public URL: https://nottingham-repository.worktribe.com/output/4939601
• Publisher URL: https://www.sciencedirect.com/science/article/abs/pii/S0955221920307901