X-ray diffraction peak broadening and lattice strain in LaNi5-based alloys

Yumiko Nakamura, Keisuke Oguro, Itsuki Uehara, Etsuo Akiba

研究成果: Contribution to journalArticle査読

56 被引用数 (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 mechanism of formation of lattice strain in hydriding and dehydriding. The Rietveld method was used to evaluate the degree of peak broadening and to determine anisotropic peak broadening axis for LaNi5 and LaNi5-xMα (M: Mn, Fe, Cu, Al; α = 0.25, 0.5) before hydriding, after activation and after 1000 hydriding-dehydriding cycles. All the alloys studied showed anisotropic broadening vectors of the same direction 〈110〉 after activation. The degree of the peak broadening, however, strongly depended on the substitution elements. Hydriding-dehydriding cycles did not influence the direction of the anisotropic peak broadening axis, while both anisotropic and isotropic peak broadening increased with number of cycles. It was found that the lattice strain analyzed from the peak broadening in X-ray diffraction profiles corresponded to dislocations with Burgers vectors 〈hk0〉 observed by transmission electron microscope.

ジャーナルJournal of Alloys and Compounds
出版ステータス出版済み - 2 28 2000

All Science Journal Classification (ASJC) codes

  • 材料力学
  • 機械工学
  • 金属および合金
  • 材料化学


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