Hydrogen absorption and desorption in the binary Ti-Al system

K. Hashi, K. Ishikawa, K. Suzuki, K. Aoki

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Binary Ti 1-xAl x alloys were hydrogenated at 5 MPa H 2 pressure at room temperature for 173 ks. Structures and thermal stability of the hydrogenated alloys were investigated by XRD and DSC. The hydrogen absorption and hydrogen desorption behavior were investigated by means of a hydrogen analyzer, DSC and XRD. An fcc type (CaF 2 type) hydride formed for x=0, 0.20 and 0.25 and an amorphous hydride for x=0.30 and 0.35. That is, off-stoichiometric (Al-rich) Ti 3Al (α 2) amorphized by hydrogen absorption. The amount of hydrogen absorption under the quoted conditions decreased with increasing Al concentration, but the 50% hydrogen desorption temperature T d increased. The hcp solid solution alloy Ti 0.80Al 0.20 showed the best hydrogen absorption and desorption properties of the Ti 1-xAl x alloys investigated.

Original languageEnglish
Pages (from-to)547-550
Number of pages4
JournalJournal of Alloys and Compounds
Publication statusPublished - 17 Jan 2002
Externally publishedYes
EventProceedings of the International Symposium on Metal-Hydrogen (MH 2000) - Noosa Heads, QLD, Australia
Duration: 1 Oct 20006 Oct 2000


  • Amorphous
  • Hydrogen absorption
  • Intermetallic compounds
  • TDS (thermal desorption spectrum)
  • Ti Al

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