Defects Formation in LaNi5-based Alloys Investigated by In-situ X-ray Diffraction

Yumiko Nakamura, Etsuo Akiba

研究成果: Contribution to journalConference article

4 被引用数 (Scopus)

抄録

Defects formation in LaNis-based alloys was investigated by X-ray diffraction (XRD). In-situ XRD data measured along the first hydriding-dehydriding P-C isotherms were analyzed by the Rietveld method. Lattice strain and crystallite size were evaluated from the peak profile. In LaNi5 hydride phase formed accompanying with 2 % of anisotropic lattice strain in <hk0> direction caused by dense dislocations. Coexisting solid solution phase was not affected by the strain in the hydride phase. Lattice parameter a became smaller after cycles than before hydriding, which is related with vacancies formation. Only 5 % of Al substitution for Ni dramatically changed the defects formation behavior. Hydride phase did not show lattice strain in the first hydriding but showed small strain during dehydriding. Formation of both dislocations and vacancies are strongly affected by substitution of other elements for a part of Ni.

本文言語英語
ページ(範囲)463-468
ページ数6
ジャーナルMaterials Research Society Symposium - Proceedings
753
出版ステータス出版済み - 11 11 2003
イベントDefect Properties and Related Phenomena in Intermetallic Alloys - Boston, MA, 米国
継続期間: 12 3 200212 5 2002

All Science Journal Classification (ASJC) codes

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

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