Hydride Phases Based on Ta_0.33V_0.67 Alloy with Components Partially Replaced by Ti and Nb

Abstract— The products of the reaction between hydrogen and the body-centered cubic modification of the Ta_0.33V_0.67 alloy with partial substitution of its components by titanium and niobium were studied by X-ray powder diffraction. It was found that during hydrogenation of such alloys, hydride samples with different phase compositions and different lattice types are formed. Varying the amount of titanium and niobium in the Ta_0.33V_0.67 alloy affects the transition of the crystal lattice from body-centered cubic to face-centered. Hydrogenation of the Ta_0.33V_0.67 alloy with partial substitution of components by titanium and niobium leads to the formation of stable hydrides.