ABSORPTION OF HYDROGEN BY VANADIUM-TITANIUM ALLOYS

The pressure-composition isotherms for V-Ti alloys containing titanium up to 30 at% were measured and the dependence of hydriding and dehydriding characteristics on titanium content was examined in relation to their structures. V-Ti alloys show great resistance to pulverization on hydriding and dehydriding cycles and titanium as an alloy partner gives advantageous modifications, i. e., easy 'activation', rapid absorption and desorption of hydrogen and a significant increase in the enthalpy change for the formation and decomposition of the dihydride phase, while the alloys exhibit large hysteresis and sloping plateau which could be ascribed to the inherent nature of vanadium and phase separation due to monotectoid reaction possibly existing at the vanadium-rich side of the phase diagram, respectively