Enhanced anticorrosion and antiwear properties of Ti–6Al–4V alloys with laser texture and graphene oxide coatings

The poor antiwear properties of Ti–6Al–4V have restricted its applications as biomedical materials. In this work, microgrooves with different groove width and graphene oxide (GO) coating were constructed on the surface of Ti–6Al–4V by laser processing and chemical assembly, respectively. The effects of microgroove width on the anticorrosion and biotribological properties of GOs-coated Ti–6Al–4V alloys were systematically investigated. The results indicate that the GOs-coated sample with 45 μm groove width (Ti-45-GO) can effectively improve the anticorrosion of Ti–6Al–4V, due to the surface microstructure homogenization from Ti−45 substrate and the shielding effect of GO coatings. Furthermore, the Ti-45-GO sample exhibits excellent antiwear properties, owing to the capture of wear debris of microgrooves and the high strength and resilience from GO coatings.