Electron microscopy and hydriding properties of MgYNi 4 synthesized by mechanical alloying

Yasuyuki Kitano, K. Yamada, M. Miyamoto, S. Orimo, H. Fujii, K. Aono, E. Tanabe

Research output: Contribution to journalConference articlepeer-review

8 Citations (Scopus)


The ternary alloy, MgYNi 4, was synthesized by mechanical alloying (MA). Its microscopic structures and hydriding properties were studied. The annealing of the alloy at 773 K was also studied. The alloy consists of nanocrystals of less than 10 nm in diameter. The capacity of the hydrogen atoms in the alloy increases with the increasing size of the nanocrystals. The crystal structure was found to be the C15 type Laves phase structure for the MA-treated alloy, while crystal structure of the as annealed alloy was the ordered C15 type structure which is conventionally called C15b type and is formally called AuBe 5 type structure. The hydrogen capacity in the alloy might have a strong relation to the atomic arrangement of this alloy.

Original languageEnglish
Pages (from-to)292-295
Number of pages4
JournalJournal of Alloys and Compounds
Publication statusPublished - 2002 Jan 17
EventProceedings of the International Symposium on Metal-Hydrogen (MH 2000) - Noosa Heads, QLD, Australia
Duration: 2000 Oct 12000 Oct 6


  • Crystal structure
  • Hydrogen storage
  • Mechanical alloying
  • Nanostructures
  • Transmission electron microscopy


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