Effect of substitutional Mo on diffusion and site occupation of hydrogen in the BCT monohydride phase of V-H system studied by 1H NMR

Kohta Asano, Shigenobu Hayashi, Yumiko Nakamura, Etsuo Akiba

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18 Citations (Scopus)

Abstract

The diffusion and site occupation of hydrogen in the monohydride phase of V1-xMox-H (0 ≤ x ≤ 0.1) were studied by means of 1H nuclear magnetic resonance (NMR). Hydrogen atoms in VH 0.68 occupied the octahedral (O) sites in a body centered tetragonal (BCT) structure. The addition of Mo to V reduced the activation energy for hydrogen diffusion, EH, for the O sites. In V0.9Mo 0.1H0.68 hydrogen atoms occupied both the O and tetrahedral (T) sites, which was demonstrated by two components observed in the temperature dependence of the 1H spin-lattice relaxation time. The value of EH for the T sites was lower than that for the O sites. Hydrogen atoms in V0.9Mo0.1H0.68 diffused faster than those in VH0.68.

Original languageEnglish
Pages (from-to)399-404
Number of pages6
JournalJournal of Alloys and Compounds
Volume507
Issue number2
DOIs
Publication statusPublished - Oct 8 2010

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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