Synthesis and hydriding/dehydriding properties of amorphous Mg2Ni1.9M0.1 alloys mechanically alloyed from Mg2Ni0.9M0.1 (M = none, Ni, Ca, La, Y, Al, Si, Cu and Mn) and Ni powder

N. Terashita, M. Takahashi, K. Kobayashi, T. Sasai, E. Akiba

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Amorphous Mg2Ni1.9M0.1 (M = none, Ni, Ca, La, Y, Al, Si, Cu and Mn) alloys were prepared by mechanical alloying of pseudo-binary Mg2Ni0.9M0.1 intermetallic compounds and Ni powder. The crystal structures, thermal stabilities and hydriding/dehydriding properties of those alloys were characterized by powder X-ray diffraction, thermal analysis and conventional measurement of pressure composition isotherms. In spite of the difference in M element, all specimens formed amorphous structures by mechanical alloying. Owing to the substitution of Ca the amount of desorbed hydrogen increased from 1.8 mass% for M = none to 2.1 mass% for M = Ca by measurement of thermogravimetry. The dehydriding reactions occurred at temperatures below about 400 K in both alloys.

Original languageEnglish
Pages (from-to)541-545
Number of pages5
JournalJournal of Alloys and Compounds
Publication statusPublished - Dec 20 1999
EventProceedings of the 1998 International Symposium on Metal-Hydrogen Systems - Fundamentals and Applications (MH98) - Hangzhou, China
Duration: Oct 4 1998Oct 9 1998

All Science Journal Classification (ASJC) codes

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

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