Microstructure and Tribological Properties of Plasma-Sprayed CoCrFeNi-based High-Entropy Alloy Coatings Under Dry and Oil-Lubricated Sliding Conditions

The CoCrFeNi-based high-entropy alloy coatings were prepared by atmospheric plasma spraying. The microstructure, phase, microhardness and corrosion resistance of the coatings were characterized. The tribological properties of the coatings sliding against GCr15 balls under dry and oil-lubricated sliding conditions were investigated. The results show that the phase composition of the CoCrFeNiAl coating is mainly BCC phase, accompanied by a small...