Hydriding properties of ordered-/disordered-Mg-based ternary Laves phase structures

Nobuko Hanada, Shin Ichi Orimo, Hironobu Fujii

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Ternary Laves phase structures with compositions MgYNi4, MgCaNi4 and CaYNi4 were prepared, and the relationship between the structures and hydriding properties was studied in detail. Only in MgYNi4 are Mg and Y found to be ordered and a plateau pressure is clearly observed in the P-C isotherm during the dehydriding process. In MgCaNi4, however, Mg and Ca are disordered, and hydrogen content of MgCaNi4 is ~30% larger than that of MgYNi4. Control of their order/disorder in Laves phase structures may provide the hydriding properties with higher hydrogen concentrations and flatter plateau regions.

Original languageEnglish
Pages (from-to)429-432
Number of pages4
JournalJournal of Alloys and Compounds
Volume356-357
DOIs
Publication statusPublished - 2003 Aug 11
Externally publishedYes

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Phase structure
Hydrogen
Order disorder transitions
Isotherms
Chemical analysis

Keywords

  • Hydrogen storage material
  • Mechanical alloying
  • Thermal analysis
  • X-ray diffraction

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Hydriding properties of ordered-/disordered-Mg-based ternary Laves phase structures. / Hanada, Nobuko; Orimo, Shin Ichi; Fujii, Hironobu.

In: Journal of Alloys and Compounds, Vol. 356-357, 11.08.2003, p. 429-432.

Research output: Contribution to journalArticle

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