Study of the Interaction with Hydrogen and Ammonia of Titanium and Its Alloys with Iron

Abstract

Results of hydrogenation of titanium, intermetallic compound TiFe, and titanium-enriched alloys with iron, Ti₆₇Fe₃₃ (Ti₂Fe) and Ti₈₀Fe₂₀ (Ti₄Fe), with hydrogen and ammonia were summarized and analyzed. The phase transformations in the temperature range 20–500°C were found, the temperatures at which hydride phase are formed were determined, the alloy dispersion conditions were optimized, and the reaction products were analyzed. Specific features of the interaction of the polymetallic systems with ammonia in the presence of ammonium chloride at various temperatures were revealed, and the conditions in which hydride, hydride-nitride, and nitride phases are formed were determined. Data were obtained about the possibility of using Ti-Fe alloys as the working material in reusable metal hydride hydrogen accumulators.