Microstructure and wear behaviour of in-situ TiN-Al2O3 reinforced CoCrFeNiMn high-entropy alloys composite coatings fabricated by plasma cladding

The micro-nano TiN-Al2O3 multiphase ceramics were in-situ synthesized in CoCrFeNiMn high-entropy alloys (HEAs) coating by plasma cladding. The as-prepared coating has a FCC single-phase. The hardness of TiN-Al2O3/CoCrFeNiMn HEAs composite coating was 17.6% higher than that of pure HEAs coating. The wear volume of the composite coating was 11.07 x 10(-3) mm(3), which was 12.5% lower than that of pure HEAs coating. Furthermore, the TiN-Al2O3 ceramic particles have significant effect to restrain the adhesive wear and promote the steady-state friction of the HEAs coating during sliding process. (C) 2020 Elsevier B.V. All rights reserved.