1. Enhancing wear performance by depositing alumina/GNPs coating on textured WC-TiC-Co substrates.
- Author
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Liu, Changxia, Sun, Junlong, Venturi, Federico, Romero, Acacio Rincon, and Hussain, Tanvir
- Subjects
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SURFACE texture , *MECHANICAL wear , *STRESS concentration , *SURFACE coatings , *GRIDS (Cartography) - Abstract
Grid and line textures were made on the top surfaces of WC-TiC-Co cemented carbide substrates. Suspension High Velocity Oxy-Fuel (SHVOF) was utilized to deposit alumina and graphene nanoplatelets (GNPs) coating on the textured surfaces. The friction and wear behaviors of the Alumina/GNPs coating were evaluated using dry sliding wear tests against alumina balls. The friction reduction mechanism of alumina/GNPs coating was presented. GNPs in the alumina coatings played a significant role in reducing the coefficient of friction (CoF) up to 40 % and improving the wear resistance properties of the coating. A stress distribution model of the friction contact zone was provided to analyze the tribological performance of the textured sample. The friction reduction mechanism for alumina/GNPs coating was discussed. These results offer a benchmark for further studies combining microtextured surfaces and SHVOF thermal sprayed coatings as promising candidates for high wear resistant applications. • The stress distribution model of the friction contact zone was provided. • A wear mechanism for GNPs doped Al 2 O 3 coatings was proposed. • A thin, controlled layer which preserved the texture surface morphology was formed. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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