X-ray diffraction peak broadening and degradation in LaNi5-based alloys

Y. Nakamura, K. Oguro, I. Uehara, E. Akiba

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33 Citations (Scopus)


Peak broadening in X-ray powder diffraction (XRD) profiles of LaNi5-based alloys after hydriding and dehydriding processes, was investigated in order to clarify the relation between the formation of lattice strain and degradation by the hydriding-dehydriding cycling. The degree of peak broadening in XRD profiles was calculated by the Rietveld method and hydrogen capacity was evaluated from P-C isotherms for LaNi5 and LaNi5-αMα (M: Mn, Fe, Cu, Al; α = 0.25, 0.5) after activation and after 1000 hydriding-dehydriding cycles. It was found that an anisotropic peak broadening parameter expressing lattice strain after activation has a linear relation with the decrease in hydrogen capacity. The above parameter is a suitable indicator of the ease of degradation in LaNi5-based alloys.

Original languageEnglish
Pages (from-to)531-537
Number of pages7
JournalInternational Journal of Hydrogen Energy
Issue number6
Publication statusPublished - Jun 1 2000
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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