Phase transformations during dynamic dehydrogenation of Ti 1-xVxH2 (x = 0.1; 0.2; 0.3) were studied using in situ Synchrotron X-Ray Diffraction (SR XRD) and non-isothermal kinetics experiments. The main dehydrogenation path for γ-Ti1-xV xH2 was found to be γ → δ → β → βalloy. Body-centred tetragonal δ-hydride was found to be an intermediate phase of the γ → β transformation in Ti0.8-0.9V0.1-0.2H2. TDS, in situ SR XRD and isoconversional kinetics studies showed that hydrogen desorption from Ti 1-xVxH2 is composed of simultaneous reactions taking place between 300 and 600 C. The effective activation energy of hydrogen desorption depends on the vanadium contents and the reaction pathway, increasing from 21 kJ/mol H2 (γ → δ) to 60-110 kJ/mol H 2 (δ → β).
- In situ synchrotron X-ray diffraction
- Isoconversional kinetics
- Metal hydride
- Thermal desorption spectroscopy