Defects in Thin Layers of High Entropy Alloy HfNbTaTiZr

Abstract

High entropy alloys represent a new type of materials with unique combination of physical properties originating due to occurrence of single phase solid solution of numerous elements. Preparation of high entropy alloys films with nanosized grains promises increased effective surface and high intergranular diffusion of elements. In the present work HfNbTaTiZr films were deposited by magnetron sputtering from single phase HfNbTaTiZr target prepared by spark plasma sintering. Chemical composition of high entropy alloys thin films prepared this way was enriched in Ti and depleted in Zr and Nb. Very fine microstructure of the film was documented and defect distribution was found to be non-uniform with depth.

Research Progress of Titanium-Based High Entropy Alloy: Methods, Properties, and Applications

“…Furthermore, the corrosion resistance of the NbTiAlSiZrNx HEA coating was prepared by Xing et al (2019) under the various nitrogen flow rates is significantly different from that of 304 stainless steel. Lukáè et al (2020) prepared the HfNbTaTiZr HEA film that presents a nano-cell structure with fine surface microstructure and uneven distribution of defects by DC magnetron sputtering. Chen et al (2019) have studied the mechanical properties and tribo-corrosion behavior of VAlTiCrCu HEA thin film deposited on the surface of 304 stainless steel at different deposition temperatures by magnetron sputtering.…”