Synthesis, characterization and tribological studies of Chromium-Nano diamond composite coating
N. Zoghipour E. Salamci Rahmi Ünal N. Gidikova* R. Valov V. Petkov
AbstractNano composite coatings are a new forms of materials containing hard phase particles to enhance the hardness and wear resistance, among which diamond in terms of feasibility and cost, is the best combination for chromium. In this study, electrolytic coating of pure chromium and Cr-ND (nano diamond) composite coatings were applied on pre-alloy metal powder metallurgy specimens. The effects of the ND particles on tribological behavior of the chromium coatings were investigated. Characterization tests were carried out using an optical microscope, SEM, EDS, XRD and AFM. The dry sliding wear behavior of the specimens was carried out using pin on plate configuration. The hardness and wear resistance of the Cr-ND coated samples were compared with pure chromium coated and non-coated specimens. The results demonstrated that the embedding of the ND particles in the chromium matrix led to a significant improvement on the hardness and wear behavior of the Cr-ND coatings than pure chromium coatings and non-coated specimens.