Abstract
In this investigation, Cr2O3-TiO2 + Ni Graphite ceramic coating was deposited using plasma spray method. Abrasive wear tests were conducted for determining the tribological behavior of coating. Wear and friction tests were performed at different loads and at a fixed sliding velocity. Structural and mechanical characterization of as deposited and worn out coatings was done. X-Ray Photoelectron Spectroscopy (XPS) was also used to confirm the formation of various oxides. Results showed that there is 18–44% reduction in friction coefficients and 1.3–2 times reduction in wear rates by the graphite addition in Cr2O3-TiO2 coating. Improvement in fracture toughness was also obtained which led to the better wear resistance of Cr2O3-TiO2-Ni Graphite coating. Consequences of tribo film formation and responsible wear mechanisms are also pointed out. Results of the present study can lead the way to study the effects of heat treatment and coating thickness on tribological behavior of the coating.
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