Novel approach to explore hydrogen trapping sites in aluminum: Integrating Muon spin relaxation with first-principles calculations

Kazuyuki Shimizu*, Katsuhiko Nishimura*, Kenji Matsuda, Norio Nunomura, Takahiro Namiki, Taiki Tsuchiya, Satoshi Akamaru, Seungwon Lee, Tomohito Tsuru, Wataru Higemoto, Hiroyuki Toda

*この論文の責任著者

研究成果: ジャーナルへの寄稿学術論文査読

1 被引用数 (Scopus)

抄録

This paper provides a novel technique to explore hydrogen trapping in aluminum alloys by combining muon spin relaxation and first-principles calculations. Zero-field muon spin relaxation experiments were conducted on Al–Mn, Al–Cr, Al–Fe, and Al–Ni alloys, resulting in temperature-dependent variations of the dipole field widths (Δ) that elucidated four distinct peaks for the prepared alloys. Our first-principles calculations have clarified that atomic configurations of the muon trapping, which correspond to the Δ peaks below 200 K, are consistent with hydrogen trapping sites in proximity to a solute and solute-vacancy pair. However, significant deviations from this linear relationship were observed for the fourth Δ peaks above 200 K in Al–Mn, Al–Cr, Al–Fe, and Al–Ni alloys. This discrepancy can be interpreted by considering the disparate distribution functions of muon and hydrogen within the tetrahedral site, wherein two of the four Al atoms are substituted by the solute element and vacancy (solute-vacancy pair).

本文言語英語
ページ(範囲)292-299
ページ数8
ジャーナルInternational Journal of Hydrogen Energy
95
DOI
出版ステータス出版済み - 2024/12/18

ASJC Scopus 主題領域

  • 再生可能エネルギー、持続可能性、環境
  • 燃料技術
  • 凝縮系物理学
  • エネルギー工学および電力技術

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