Thermodynamic Analysis of CoCrFeNi High-Entropy Alloys Prepared by Molten Salt Method

CoCrFeNi high entropy alloys (HEAs) exhibit some unique properties, such as outstanding ductility, good wear, corrosion, and oxidation resistance, which make them have potential in electronics, aerospace, biomedicine, and other fields. The electro-deoxidation of Co3O4, Cr2O3, Fe2O3, and NiO in NaCl–CaCl2 molten salt to obtain CoCrFeNi HEAsCoCrFeNi HEAs is analyzed by thermodynamic analysis. ThermodynamicThermodynamic calculation results show that NiFe2O4, NiCr2O4, CoFe2O4, and CoCr2O4 oxide spinels will be spontaneously generated, without applying voltage to Co3O4, Cr2O3, Fe2O3, and NiO sintering. NiFe2O4, NiCr2O4, CoCr2O4, and CoFe2O4 are electrolyzed in turn after applying voltage. Finally, the theoretical reduction order of the four metal elements is Ni, Fe, Co, and Cr by comparing the theoretical decomposition potentialsDecomposition potential. This study provides theoretical support for the preparation of CoCrFeNi HEAsCoCrFeNi HEAs by molten salt electro-deoxidationMolten salt electro-deoxidation.