Hydriding properties of a nano-/amorphous-structured Mg-Ni-H system

S. Orimo, H. Fujii, K. Ikeda, Y. Fujikawa, Y. Kitano

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

The alloys Mg-x at.% Ni (x=33, 38, 43 and 50) with nanometer-scale structures were successively synthesized by mechanical grinding of Mg2Ni mixed with various amounts of additional Ni. The total hydrogen contents in these alloys increases from 1.7 mass% for x=33 to 2.2 mass% for x=43 and 50, while the dehydriding temperatures gradually lower from 440 K to 373 K with increasing of the Ni amounts. The value of the total hydrogen content in each alloy is reasonably explained by taking into account the hydrogen contents of the following three regions; the intra-grain region of nanostructured Mg2Ni, its inter-grain region, and the amorphous MgNi region. The maximum hydrogen content in the amorphous MgNi region, 2.2 mass%, might imply a specific interatomic occupation of hydrogen atoms in this region.

Original languageEnglish
Pages (from-to)94-97
Number of pages4
JournalJournal of Alloys and Compounds
Volume253-254
DOIs
Publication statusPublished - 1997 May 20
Externally publishedYes

Keywords

  • Amorphous
  • Inter-grain
  • Intra-grain
  • Magnesium-nickel-hydrogen
  • Nanostructure

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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