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Microstructure and tribological behaviour of alumina composites reinforced with SiC-graphene core-shell nanoparticles

Journal Article


Abstract


  • SiC-graphene nanosheets (GNSs) core-shell nanoparticles were incorporated into alumina matrix composites. The composites showed refined grain sizes, increased toughness and hardness. Ball-on-disk wear tests were conducted and the results demonstrated that the coefficient of friction was reduced by 29.4%, and the wear rate was reduced by 90.1% for the composite containing 5 vol % SiC and 1 vol % GNSs at 90 N in comparison to monolithic alumina. These results are superior to Al2O3-graphene composites documented in the literature. The microstructure and topography of the wear scars were examined to understand the wear behaviour. GNSs-rich tribofilms were observed on the wear scar. The contributing mechanism of the self-lubricating and wear-resistance performance was explored.

Publication Date


  • 2019

Citation


  • Zhang, J., Yang, S., Chen, Z., Wyszomirska, M., Zhao, J. & Jiang, Z. (2019). Microstructure and tribological behaviour of alumina composites reinforced with SiC-graphene core-shell nanoparticles. Tribology International, 131 94-101.

Scopus Eid


  • 2-s2.0-85055636052

Number Of Pages


  • 7

Start Page


  • 94

End Page


  • 101

Volume


  • 131

Place Of Publication


  • United Kingdom

Abstract


  • SiC-graphene nanosheets (GNSs) core-shell nanoparticles were incorporated into alumina matrix composites. The composites showed refined grain sizes, increased toughness and hardness. Ball-on-disk wear tests were conducted and the results demonstrated that the coefficient of friction was reduced by 29.4%, and the wear rate was reduced by 90.1% for the composite containing 5 vol % SiC and 1 vol % GNSs at 90 N in comparison to monolithic alumina. These results are superior to Al2O3-graphene composites documented in the literature. The microstructure and topography of the wear scars were examined to understand the wear behaviour. GNSs-rich tribofilms were observed on the wear scar. The contributing mechanism of the self-lubricating and wear-resistance performance was explored.

Publication Date


  • 2019

Citation


  • Zhang, J., Yang, S., Chen, Z., Wyszomirska, M., Zhao, J. & Jiang, Z. (2019). Microstructure and tribological behaviour of alumina composites reinforced with SiC-graphene core-shell nanoparticles. Tribology International, 131 94-101.

Scopus Eid


  • 2-s2.0-85055636052

Number Of Pages


  • 7

Start Page


  • 94

End Page


  • 101

Volume


  • 131

Place Of Publication


  • United Kingdom