On the synthesis, characterisation and hydrogenation behaviour of V-Ti-Fe alloy

Abstract

A hydrogen storage vanadium-based solid solution alloy V0.85Ti0.10Fe0.05 has been synthesised through a new route involving solid state diffusion. For the diffusion, a specific temperature-time profile has been determined, this corresponds to 30 °C (30 °C min-1) → 700 °C (12 h); 1.5 °C min-1 → 900 °C (36 h); 2.5 °C min-1 → 30 °C. The structural characterisation of the alloy has been carried out through XRD and electron diffraction techniques, the compositional analysis has been done by applying the EDAX technique. These investigations reveal the alloy lattice to be b.c.c. type solid solution with a = 3.042 A ̊, which is in accordance with the lattice parameter a = 3.046 A ̊ determined from Vegard's law and average compositions correspond to the envisaged stoichiometry. The formation of the alloy has also been checked through hydrogenation-dehydrogenation behaviour. © 1995.