1. Microstructure and wear performance of alumina/graphene coating on textured Al2O3/TiC substrate composites.
- Author
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Liu, Changxia, Sun, Junlong, Venturi, Federico, Romero, Acacio Rincon, and Hussain, Tanvir
- Subjects
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GRAPHENE , *CERAMIC coating , *ALUMINUM oxide , *TITANIUM carbide , *SURFACE coatings , *MICROSTRUCTURE , *GRIDS (Cartography) - 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 Al 2 O 3 /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 Al 2 O 3 /TiC substrate composites was evaluated using ball-on-disc sliding wear tests. The alumina/GNPs coated Al 2 O 3 /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 Al 2 O 3 /TiC substrate composites and the counterbody. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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