Tribological behavior of graphene nanoplatelet reinforced 3YTZP composites

The tribological behavior of graphene nanoplatelet (GNP) reinforced 3 mol% yttria tetragonal zirconia polycrystals (3YTZP) composites with different GNP content (2.5, 5 and 10 vol%) was analyzed and discussed. Their dry sliding behavior was studied using a ball-on-disk geometry with zirconia balls a...

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Bibliographic Details
Published in:Journal of the European Ceramic Society 2019-04, Vol.39 (4), p.1381-1388
Main Authors: Gutiérrez-Mora, F., Morales-Rodríguez, A., Gallardo-López, A., Poyato, R.
Format: Article
Language:English
Subjects:
3YTZP
Carbon nanophases
Friction
Graphene
Wear resistance
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Summary:The tribological behavior of graphene nanoplatelet (GNP) reinforced 3 mol% yttria tetragonal zirconia polycrystals (3YTZP) composites with different GNP content (2.5, 5 and 10 vol%) was analyzed and discussed. Their dry sliding behavior was studied using a ball-on-disk geometry with zirconia balls as counterparts, using loads between 2 and 20 N at ambient conditions and compared to the behavior of a monolithic 3YTZP ceramic used as a reference material. The composites showed lower friction coefficients and higher wear resistance than the monolithic 3YTZP. An outstanding performance was achieved at 10 N, where the friction coefficient decreased from 0.6 to 0.3 and the wear rates decreased 3 orders of magnitude in comparison with the monolithic ceramic. A layer adhered to the worn surface was found for all the composites, but it did not acted as a lubricating film. The composites with the lowest GNP content showed an overall improved tribological behavior.
ISSN:0955-2219
1873-619X
DOI:10.1016/j.jeurceramsoc.2018.11.005