Formation of high-entropy TiZrVCrAl coating on the surface of the Ti-6Al-4V titanium alloy at different technological parameters

Abstract

The paper presents the results of the characterization of single layer high-entropy TiZrVCrAl coatings deposited by the vacuum-arc method on substrates from the structural titanium alloy VT6 (Ti-6Al-4V) by 4 different modes. The used deposition modes were developed taking into account the influence of the arc evaporator current, bias voltage and gas pressure in the chamber on the process of coatings formation, which allowed to select the chemical composition of the high-entropy coatings and to establish the regularities of their elemental composition formation. According to the results of the conducted studies, the most optimal modes of coating deposition were determined according to the criteria of microhardness, adhesive strength and chemical composition for further development of the architecture of multilayer high entropy coatings on the surface of the Ti-6Al-4V titanium alloy with an ultrafine-grained structure.