Microstructure and Thermal Analysis of Metastable Intermetallic Phases in High-Entropy Alloy CoCrFeMo0.85Ni

CoCrFeMoNi high entropy alloys (HEAs) exhibit several promising characteristics for potential applications of temperature coating. In this study, metastable intermetallic phases and their thermal stability high-entropy alloy CoCrFeMo0.85Ni were investigated via microstructural analyses. Solidus liquidus temperatures determined by differential analysis as 1323 °C 1331 °C, respectively. Phase transitions also occur at 800 1212 during heating. Microstructure exhibits a single-phase face-centred cubic (FCC) matrix embedded with the mixture (Co, Cr, Fe)-rich tetragonal phase Mo-rich rhombohedron-like phase. The morphologies two intermetallics show matrix-based bordered rhombohedral precipitates around perimeter. experimental results presented in our paper provide key information on microstructure alloy, which will assist development similar spray HEA coatings.