Saturated hydrides in the HfV{sub 2}-D system
- Russian Research Centre 'Kurchatov Institute' (Russian Federation)
- CEA-CNRS, CEA/Saclay, Laboratoire Leon Brillouin (France)
Saturated solid solutions of hydrogen (deuterium) are synthesized up to the ratio D/HfV{sub 2} = 5.1 for the HfV{sub 2} compound with a structure of the cubic Laves phase (the C15 type) and the HfV{sub 2}-based alloys (Hf{sub 0.7}Zr{sub 0.3})V{sub 2} and Hf(V{sub 0.92}Ti{sub 0.08}){sub 2} with partial substitution. The structure of the solid solutions is studied using neutron diffraction at room temperature. The saturated solid solutions of hydrogen are disordered: hydrogen occupies tetrahedral interstices 2Hf + 2V and 1Hf + 3V. The concentration of hydrogen in the solid solutions increases as the occupancy of the 1Hf + 3V interstices increases to the maximum value p{sub 1Hf+3V} {approx} 0.46, whereas the occupancy of the 2Hf + 2V interstices remains constant and equal to p{sub 2Hf+2V} {approx} 0.28. The maximum hydrogen concentration depends linearly on the lattice parameter of the initial intermetallic compound.
- OSTI ID:
- 21090917
- Journal Information:
- Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 3 Vol. 52; ISSN 1063-7745; ISSN CYSTE3
- Country of Publication:
- United States
- Language:
- English
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