Abstract

Graphene oxide-Co (GO-Co) composite coatings containing reduced graphene oxides were grown on type 304 stainless steel at 1000 degrees C, by treatment for 60 min in a tube furnace under an Ar flow of 350 mL/min. Raman spectroscopy showed that the coatings mainly comprised graphene oxides as graphene and reduced graphene oxides (GO and rGO). X-ray photoelectron spectroscopy (XPS) analysis identified the band energies of the C-O and C=O bonds, as well as the presence of GO, CoFe2O4, and Co2O3. Electron backscattered diffraction showed a refined composite coating and a maximum wear resistance of 0.12 mm(3) under a load of 6 N due to auto-lubrication. This work is of great interest for industries utilizing machinery and equipment exposed to wear conditions in the absence of lubricants.