Wear Behavior of Detonation-Sprayed (Ti,Cr)C-Ni Coatings under Dry and Lubricating Environment

The objective of this study is to investigate the tribological properties of detonation-sprayed (Ti,Cr)C-Ni coatings under dry and lubricating conditions. The (Ti,Cr)C-based coatings with 25 wt.%, and 33 wt.% of Ni binder were applied onto steel substrates by detonation spraying. Microreciprocating wear tests were performed under dry and lubricating conditions with water, diesel, biofuel, aviation fuel and oil as a lubricating environment. Post-test examination of wear tracks was performed using interference profilometry and SEM analysis. The (Ti,Cr)C-Ni detonation-sprayed coatings exhibit a dense microstructure, featuring well-bonded splats composed of fine (Ti,Cr)C particles and Ni-based binder. The lowest wear rates of the (Ti,Cr)C-25wt.%Ni and (Ti,Cr)C-33wt.%Ni coatings are observed in an oil environment. Instead, the wear rates of both coatings are highest in a water environment. The (Ti,Cr)C-25%wt.Ni detonation-sprayed coating is characterized by an increased wear rate in the water environment as compared with (Ti,Cr)C-33%wt.Ni due to more intensive brittle failure in the water environment.