Significance of grain boundaries and stacking faults on hydrogen storage properties of Mg2Ni intermetallics processed by high-pressure torsion

Toshifumi Hongo, Kaveh Edalati, Makoto Arita, Junko Matsuda, Etsuo Akiba, Zenji Horita

研究成果: ジャーナルへの寄稿記事

54 引用 (Scopus)

抄録

Mg2Ni intermetallics are processed using three different routes to produce three different microstructural features: annealing at high temperature for coarse grain formation, severe plastic deformation through high-pressure torsion (HPT) for nanograin formation, and HPT processing followed by annealing for the introduction of stacking faults. It is found that both grain boundaries and stacking faults are significantly effective to activate the Mg2Ni intermetallics for hydrogen storage at 423 K (150 °C). The hydrogenation kinetics is also considerably enhanced by the introduction of large fractions of grain boundaries and stacking faults while the hydrogenation thermodynamics remains unchanged. This study shows that, similar to grain boundaries and cracks, stacking faults can act as quick pathways for the transportation of hydrogen in the hydrogen storage materials.

元の言語英語
ページ(範囲)46-54
ページ数9
ジャーナルActa Materialia
92
DOI
出版物ステータス出版済み - 6 15 2015

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Stacking faults
Hydrogen storage
Torsional stress
Intermetallics
Grain boundaries
Hydrogenation
Annealing
Hydrogen
Plastic deformation
Thermodynamics
Cracks
Kinetics
Processing
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

これを引用

Significance of grain boundaries and stacking faults on hydrogen storage properties of Mg2Ni intermetallics processed by high-pressure torsion. / Hongo, Toshifumi; Edalati, Kaveh; Arita, Makoto; Matsuda, Junko; Akiba, Etsuo; Horita, Zenji.

:: Acta Materialia, 巻 92, 15.06.2015, p. 46-54.

研究成果: ジャーナルへの寄稿記事

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AU - Akiba, Etsuo

AU - Horita, Zenji

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