Formation of High-Entropy Multilayer Compositions with a Hierarchical Structure

The authors carried out complex studies of a composite multilayer high-entropy coating obtained by HVOF in a protective atmosphere. They also investigated metallophysical properties of the coating (using electron microscopy and X-ray diffraction analysis) in order to obtain new information on its composition, mechanical properties, and phase composition. Functional properties of the high-entropy layer were also determined. The effect of mechanical activation of powders on the structural-phase state and quality of the layered coating has also been studied. On the basis of complex metallophysical studies, they investigated the formation of a structure in a composite multilayer high-entropy coating after HVOF in a protective atmosphere and subsequent thermomechanical treatment. Calorimetric tests of the functional high-entropy layer were carried out to reveal the exo effect corresponding to the manifestation of phase transformation. The mechanical properties of steel with a multilayer composite coating have been determined.