Hydrogen storage of melt-spun amorphous Mg65Ni 20Cu5Y10 alloy deformed by high-pressure torsion

A. Révész, Á Kis-Tóth, L. K. Varga, E. Schafler, I. Bakonyi, T. Spassov

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Rapidly quenched amorphous Mg65Ni20Cu 5Y10 metallic glass compacts were subjected to heavy shear deformation by high-pressure torsion until different amounts of ultimate strain. High-resolution X-ray diffraction analysis and scanning electron microscopy revealed that high-pressure torsion resulted in a deformation dependent microstructure. High-pressure calorimetry measurements revealed that hydrogen uptake in the fully amorphous alloy occurs at a significantly lower temperature compared to the fully crystallized state, while the amount of absorbed hydrogen increased considerably after heavy shear deformation due to the formation of Mg2Ni crystals.

Original languageEnglish
Pages (from-to)5769-5776
Number of pages8
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number7
DOIs
Publication statusPublished - Apr 1 2012

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Keywords

  • Deformation
  • H-storage
  • High-pressure torsion
  • Mg-based alloys

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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