Lattice defect behavior of LaNi4.97Sn0.27 during hydrogenation cycles

Kouji Sakaki, Yumiko Nakamura, Yasuharu Shirai, Robert C. Bowman, Etsuo Akiba

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Lattice defect behavior of LaNi4.97Sn0.27 during the hydrogenation cycles has been investigated by in-situ positron lifetime measurement. Mean positron lifetime increased and decreased by each hydrogenation and dehydrogenation, respectively, independently of the hydrogenation cycles. It suggests that lattice defects are introduced by the hydrogenation and removed from the lattice by the dehydrogenation even at below the migration temperature of vacancy in LaNi5. Furthermore, dislocation density and vacancy concentration kept almost constant at the value of around 6 × 109 cm-2 and 10ppm through at least eight hydrogenation/dehydrogenation cycles.

Original languageEnglish
Pages (from-to)1875-1877
Number of pages3
JournalMaterials Transactions
Issue number8
Publication statusPublished - Aug 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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