Measurement and modelling of hydriding and dehydriding kinetics

A. Inomata, H. Aoki, T. Miura

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

The rates of hydriding and dehydriding were measured for LaNi5Hx under isothermal and isobaric conditions. Obtained data of hydriding rates indicated that the rate controlling step was the nucleation and growth process of the hydride phase and then changed to hydrogen diffusion through the hydride phase at the later stage. On the other hand, for the desorption of hydrogen, the rate controlling step was only the homogeneous chemical reaction of the hydride phase. Theoretical rate equations were derived on the basis of the kinetic model of hydriding and dehydriding reaction proposed in this study. A satisfactory agreement between the theoretical and experimental results was obtained.

Original languageEnglish
Pages (from-to)103-109
Number of pages7
JournalJournal of Alloys and Compounds
Volume278
Issue number1-2
DOIs
Publication statusPublished - 1998 Aug 1

Keywords

  • Dehydriding rate
  • Hydriding rate
  • Kinetics
  • Metal hydride
  • Nucleation and growth

ASJC Scopus subject areas

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

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