Synthesis of TiZrHfVNb Multi-Principal Element Alloy using SHS Hydrides by “Hydride Cycle” Method

Finding new energy effective methods for the production of refractory multi-principal element alloys (MPEAs) is a challenge for rapidly developing MPEA materials science. Formation of equimolar TiZrHfVNb MPEA and evaluation of alloy potential for use as hydrogen storage material were investigated. In this study, we demonstrated, for the first time to the best of our knowledge, that MPEA can be produced using SHS hydrides as precursor materials by “Hydride Cycle” (HC) method. The hydrogenation of obtained alloy by self-propagating high-temperature synthesis (SHS) method was studied. Crystal structure, surface microstructure, chemical composition, and thermal stability of synthesized materials were studied. It was shown that two-phase (α + β) alloy was synthesized. As a result of the SHS hydrogenation process, TiZrHfVNb alloy absorbed 1.8 wt % of hydrogen.