Formation of lattice strain in MmNi4.30 - x Cox Al0.30 Mn0.40(x = 0, 0.75) during hydrogenation

Daisuke Endo, Kouji Sakaki, Etsuo Akiba

研究成果: Contribution to journalArticle査読

5 被引用数 (Scopus)

抄録

We investigated the hydrogenation mechanism of MmNi4.30 - x Cox Al0.30 Mn0.40 (Mm: misch metal, x = 0, 0.75) by means of in situ X-ray diffraction (XRD) measurement. Formation of lattice strain and change of crystallite size for both the solid solution phase and the hydride phase were analyzed by the Rietveld refinement of XRD profiles. In MmNi4.30 Al0.30 Mn0.40, the isotropic lattice strain showed less than 0.8% for both the phases through the whole range of hydrogen content, and anisotropic strain was not observed. The crystallite size for both the phases showed around 100 nm, which did not change significantly during hydrogenation and dehydrogenation. In MmNi3.55 Co0.75 Al0.30 Mn0.40, the isotropic strain for both the phases depended on the fraction of each phase. It reached the maximum of 1.2% around the phase fraction of 0.5, while anisotropic strain was not observed. The crystallite size for both the phases showed around 100 nm through the whole range of hydrogen content. This result indicates that the solid solution phase changes to the hydride phase domain by domain during hydrogenation.

本文言語英語
ページ(範囲)4202-4208
ページ数7
ジャーナルInternational Journal of Hydrogen Energy
32
17
DOI
出版ステータス出版済み - 12 1 2007

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

フィンガープリント 「Formation of lattice strain in MmNi<sub>4.30 - x</sub> Co<sub>x</sub> Al<sub>0.30</sub> Mn<sub>0.40</sub>(x = 0, 0.75) during hydrogenation」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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