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

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

doi:10.2320/matertrans.47.1875

Lattice defect behavior of LaNi_4.97Sn_0.27 during hydrogenation cycles

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

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Lattice defect behavior of LaNi_4.97Sn_0.27 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 language	English
Pages (from-to)	1875-1877
Number of pages	3
Journal	Materials Transactions
Volume	47
Issue number	8
DOIs	https://doi.org/10.2320/matertrans.47.1875
Publication status	Published - Aug 1 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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abstract = "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.",

author = "Kouji Sakaki and Yumiko Nakamura and Yasuharu Shirai and Bowman, {Robert C.} and Etsuo Akiba",

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T1 - Lattice defect behavior of LaNi4.97Sn0.27 during hydrogenation cycles

AU - Sakaki, Kouji

AU - Nakamura, Yumiko

AU - Shirai, Yasuharu

AU - Bowman, Robert C.

AU - Akiba, Etsuo

PY - 2006/8/1

Y1 - 2006/8/1

N2 - 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.

AB - 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.

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JF - Materials Transactions

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Lattice defect behavior of LaNi_4.97Sn_0.27 during hydrogenation cycles

Abstract

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