Abstract
Single phase ternary (TiFe)100-xNix alloys were synthesized through high-energy ball milling. Ni solubility in equiatomic TiFe reaches 10 at. %, exceeding the values known from the equilibrium diagram of state and those obtainable by conventional arc melting. The reactivity of mechanically alloyed (TiFe)95Ni5 with hydrogen was investigated in detail by a combination of volumetric and calorimetric methods. The influence of Ni addition on the pressure-composition isotherms and the reaction enthalpies was evaluated. Finally, the hydrogenation behavior was compared with Ni-free mechanically alloyed TiFe and with literature data on different TiFe-Ni alloys.
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