Hydrogen absorption in the intermetallic compounds Zr2TM (TM = Cu, Ag and Au) with MoSi2-type structure (C11b)

Naruki Endo, Satoshi Kameoka, An Pang Tsai, Zou Lingling, Toshiya Hirata, Chikashi Nishimura

Research output: Contribution to journalLetterpeer-review

2 Citations (Scopus)

Abstract

Hydrogen absorption in the intermetallic compounds Zr2TM (TM = Cu, Ag, Au) with MoSi2-type structure was characterized by differential scanning calorimetry (DSC) under hydrogen, hydrogen-storage capacity measurement and X-ray diffraction (XRD). The amount of heat for the exothermic peak in DSC due to hydrogen absorption and the maximum hydrogen-storage capacity increased in the order of Zr2Cu > Zr2Ag ≫ Zr2Au. XRD revealed that Zr2Cu and Zr2Ag could decompose into Cu or Ag and ZrHx (x ∼ 2), while Zr2Au can form a solid solution with hydrogen without decomposition. These findings were well explained based on the magnitude and/or sign of the estimated enthalpy change for the decomposition of Zr2TM.

Original languageEnglish
Pages (from-to)L24-L27
JournalJournal of Alloys and Compounds
Volume490
Issue number1-2
DOIs
Publication statusPublished - 2010 Feb 4

Keywords

  • Change of enthalpy
  • Decomposition
  • Hydrogen absorption
  • Intermetallic compounds

ASJC Scopus subject areas

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

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