Hydriding of Ti45 Zr38 Ni17 - x Fex nanocompounds

A. Zywczak, Daigo Shinya, Gondek, Akito Takasaki, H. Figiel

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5 Citations (Scopus)

Abstract

Ti-based quasicrystals belong to the second largest group of the stable quasicrystals, showing attractive properties as hydrogen storage materials. The Ti45Zr38Ni17 intermetallic compound forms an icosahedral (i-phase) structure, in which Ti and Zr atoms possess very good chemical affinity for hydrogen absorption. We modified the Ti45Zr38Ni17 compounds by substituting 3d metals (iron) for Ni to obtain amorphous phase. The samples were produced by mechanical alloying. The 3d metal atoms are located in the same positions as nickel. The structural characterization was made by means of XRD measurements. Thermodynamic properties were studied by differential scanning calorimetry (DSC) and thermal desorption spectroscopy (TDS). The obtained amorphous phases Ti45Zr38Ni(9,13)Fe(8,4) transform to the i-phase at the similar temperature range as Ti45Zr38Ni17. The final concentration of absorbed hydrogen depends on the amount of Fe. When increasing the amount of iron, the hydrogen release temperature becomes lower. After hydriding, the samples decompose into simple metal hydrides.

Original languageEnglish
Pages (from-to)1-4
Number of pages4
JournalSolid State Communications
Volume150
Issue number1-2
DOIs
Publication statusPublished - 2010 Jan

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Keywords

  • A. Disordered systems
  • A. Quasicrystals
  • C. X-ray scattering
  • D. Thermodynamic properties

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Chemistry

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