High-pressure torsion of TiFe intermetallics for activation of hydrogen storage at room temperature with heterogeneous nanostructure

Kaveh Edalati, Junko Matsuda, Hideaki Iwaoka, Shoichi Toh, Etsuo Akiba, Zenji Horita

Research output: Contribution to journalArticle

54 Citations (Scopus)

Abstract

TiFe is a potential candidate for the stationary hydrogen storage systems, but it requires initial activation to absorb hydrogen. This study shows that TiFe processed by high-pressure torsion (HPT) absorbs and desorbs 1.7 wt.% hydrogen at room temperature without activation. The absorption pressure decreases from 2 MPa in the first hydrogenation cycle to 0.7 MPa in the latter cycles. The HPT-processed TiFe exhibits heterogeneous microstructures composed of nanograins, coarse-grains, amorphous-like phases and disordered phases with a high hardness of ∼1050 Hv.

Original languageEnglish
Pages (from-to)4622-4627
Number of pages6
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number11
DOIs
Publication statusPublished - Apr 15 2013

Fingerprint

Hydrogen storage
Torsional stress
Intermetallics
torsion
intermetallics
Nanostructures
Chemical activation
activation
room temperature
hydrogen
Hydrogen
cycles
Temperature
Hydrogenation
hydrogenation
hardness
Hardness
microstructure
Microstructure

All Science Journal Classification (ASJC) codes

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

Cite this

High-pressure torsion of TiFe intermetallics for activation of hydrogen storage at room temperature with heterogeneous nanostructure. / Edalati, Kaveh; Matsuda, Junko; Iwaoka, Hideaki; Toh, Shoichi; Akiba, Etsuo; Horita, Zenji.

In: International Journal of Hydrogen Energy, Vol. 38, No. 11, 15.04.2013, p. 4622-4627.

Research output: Contribution to journalArticle

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AU - Akiba, Etsuo

AU - Horita, Zenji

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