VACUUM ARC PLASMA SPRAYING OF HIGH-ENTROPY ALLOY CATHODE AND TESTING OF HEA SAMPLES IN ALKALINE ELECTROLYTE

Abstract

High internal entropy alloys (HIE) consisting of transition metals are promising materials for use in power engineering and mechanical engineering. In this work, HIE samples were obtained and studied in the form of a solid alloy and a coating. A HIE cathode sample consisting of five transition metals of the Fe-Co-Ni–Nb-Mo composition was plasma sputtered using a VDU setup. A modified structure and increased roughness of up to 100 μm were found on the cathode surface. Continuous layers of cathode material at stoichiometric composition with a porous structure, 94-103 μm thick, were obtained on copper substrates. Improvement of energy characteristics of metal-air element is shown when using materials from high-entropy alloy as anode