Abstract
HEA (high entropy alloy) is a new metallic alloy system which received, in the last period, an impressive role in material science field. The nomenclature of HEA is explained by the fact that the entropy suffers a major change at the mixing of the principal constituents in the alloy. This process, the changing of entropy, helps the formation of solid solution instead of chemical compounds. Thanks to their recorded symmetrical crystal structures, resistances to degradation in corrosive/oxidizing environment, high temperature phase stabilities and favourable mechanical properties, HEAs are classified as possible alternatives for high temperature resistant materials. The paper is structured in five point of interest: introduction, obtaining technologies, microstructures, properties of HEA coatings and conclusions.
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