Niobium and Molybdenum as Alloying Constituents in Al0.3CoCrFeNi to Develop Eutectic High-Entropy Alloys for HVOF Spraying

Abstract The addition of refractory metals represents a promising approach for development future high-entropy alloys (HEAs). Niobium and molybdenum are particularly suitable additives increasing hardness as well wear corrosion resistance. In the context surface protection applications, eutectic (EHEAs) with their homogeneous property profile specific interest. present work, two EHEAs were developed starting from alloy Al 0.3 CoCrFeNi using electric arc melting. Following mechanical microstructural characterization, found to have compositions CoCrFeNiMo 0.75 CoCrFeNiNb 0.5 . For thermal spray processing, powders above prepared by inert gas atomization. coatings produced high-velocity oxy-fuel spraying (HVOF) characterized evaluated compared castings, allowing process–structure–property relationships be derived. Based on results, statements possible application potential can made.