Tribology comparison of laser-cladded CrMnFeCoNi coatings reinforced by three types of ceramic (TiC/NbC/B4C)

In this study, three composite coatings were prepared by laser cladding, selecting the ceramic particles (B4C, TiC, or NbC), together with the powders of high-entropy alloy (HEA), i.e. CrMnFeCoNi. The results demonstrate that the composite coatings reinforced by varied carbides exhibited special microstructures, which lead to the features of micro-cutting wear, three-body wear, and fatigue wear, respectively. Therefore, the differences between the three composite coatings were compared, and evaluated in terms of phase structure, microstructure, chemical composition, nanoindentation, and phase interface correlation. Ultimately, the wear resistance mechanisms of selected ceramic particles reinforced HEA coatings were explained, and their applicability was estimated. [Display omitted] •Composite coatings of ceramic particle-reinforced HEAs prepared by LC•The mechanism of formation of the microstructure of different composite coatings was investigated.•The worn surfaces of each coating were illustrated for elaboration on the wear mechanism.•The applicability of different types of ceramic particles as reinforcement of coating is discussed.•The high strength, toughness, and root-like structure of B4C-CC give it the best wear resistance.