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Frictional and mechanical behaviour of graphene/UHMWPE composite coatings

AutorChih, A.; Ansón Casaos, Alejandro ; Puértolas, J. Antonio
Palabras clavePolyethylene
Graphene
Coating
Friction coefficient
Fecha de publicacióndic-2017
EditorElsevier
CitaciónTribology International 116: 295-302 (2017)
ResumenBulk-modified ultra-high molecular weight polyethylene (UHMWPE) is a biomaterial currently used for joint replacements. As an alternative, we assess the frictional behaviour of coatings based on graphene/UHMWPE composites and sprayed graphene, which maintain the high performance of the UHMWPE matrix. Composite coatings were prepared with 0–4.6 wt% of graphene nanoplatelets (GNP) and 1–2 layered graphene (2LG). Mechanical properties of the coatings were measured by nanoidentation and friction coefficients were determined with a ball-on-disk tribometer. The results indicate that GNP present better tribological behaviour than 2LG. Spray-coated GNP shows the lowest friction, 40% less than UHMWPE, although with low adhesion. An increase of 10% in elastic modulus and 30% in hardness was measured for composite coatings with 2–5 wt% graphene.
Versión del editorhttps://doi.org/10.1016/j.triboint.2017.07.027
URIhttp://hdl.handle.net/10261/164128
DOI10.1016/j.triboint.2017.07.027
ISSN0301-679X
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