Hydrogen vibrational excitation spectra of CaF2-type metal hydrides synthesized from Ti-based BCC solid solution alloys

Yumhxo Nakamura, Takashi Kamiyama, Etsuo Akiba

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Abstract

Hydrogen vibrational excitation was studied for CaF2-type metal hydrides synthesized from Ti-based BCC solid solution alloys using inelastic incoherent neutron scattering (IINS). Ti1.0V1.1Mn 0.9H4.5 and Ti1.0V1.2Cr 1.1H4.8 showed UNS spectra similar to that reported for TiH2. The first three peaks were isolated but the higher excitation peaks were not clear. Analysis of the spectra using curve-fitting with Gauss functions revealed that the hydrogen vibration of Ti1.0V 1.1Mn0.9H4.5 is harmonic but that of the TÍ0.7V12CrIiH48 is deviated from harmonic, which reflects a trumpet-type potential. The relation between metal-hydrogen distance and vibrational excitation energy for the above two hydrides and Ti1.1Cr 1.4Mo0.9H4.8 was compared with a series of CaF2-type binary metal hydrides. All the hydrides of the Ti-based alloys had lower vibrational excitation energies than the binary metal hydrides for the corresponding metal-hydrogen distances.

Original languageEnglish
Pages (from-to)591-594
Number of pages4
JournalMaterials Transactions
Volume52
Issue number4
DOIs
Publication statusPublished - Apr 1 2011

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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