Wear performance of bonded composite coatings under dry sliding

In this study, epoxy bonded composite coatings were prepared by spraying process. The influence of Fe3O4 nano-particles and Ni-Zn-Cu ferrite particles as additives on the wear behavior of composite coatings was investigated. The wear behaviors of composite coatings were evaluated with a block-on-ring tribo-tester under dry sliding condition. The worn morphology of the composite coatings on the surface of counterpart steel ring was observed using scanning electron microscope (SEM). It was found that the wear resistance of the composite coatings was significantly improved when incorporated with Fe3O4 nano-particles, while less affected with Ni-Zn-Cu ferrite particles. The extreme pressure anti-wear characteristic of the composite coatings filled with magnetic nano-particle could be improved drastically, and the wear process of the composite coatings was predominantly caused by adhesive wear.