Understanding composition-property relationships in Ti-Cr-V-Mo alloys for optimisation of hydrogen storage in pressurised tanks

Samantha K. Callear*, Anibal J. Ramirez-Cuesta, Kazuya Kamazawa, Shin-ichi Towata, Tatsuo Noritake, Stewart F. Parker, Martin O. Jones, Jun Sugiyama, Mamoru Ishikiriyama, William I. F. David

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The location of hydrogen within Ti-Cr-V-Mo alloys has been investigated during hydrogen absorption and desorption using in situ neutron powder diffraction and inelastic neutron scattering. Neutron powder diffraction identifies a low hydrogen equilibration pressure body-centred tetragonal phase that undergoes a martensitic phase transition to a face-centred cubic phase at high hydrogen equilibration pressures. The average location of the hydrogen in each phase has been identified from the neutron powder diffraction data although inelastic neutron scattering combined with density functional theory calculations show that the local structure is more complex than it appears from the average structure. Furthermore the origin of the change in dissociation pressure and hydrogen trapping on cycling in Ti-Cr-V-Mo alloys is discussed.

Original languageEnglish
Pages (from-to)16563-16572
Number of pages10
JournalPhysical Chemistry Chemical Physics
Volume16
Issue number31
DOIs
Publication statusPublished - 21 Aug 2014

Keywords

  • INELASTIC NEUTRON-SCATTERING
  • BCT MONOHYDRIDE PHASE
  • LATTICE-DYNAMICS
  • H SYSTEM
  • TRANSITION-METALS
  • VANADIUM HYDRIDE
  • SITE OCCUPATION
  • LOCAL MODES
  • DIFFUSION
  • TITANIUM

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