Ti-Cr-X protium absorbing alloys with high protium content for fuel-cell

M. Okada, T. Chou, A. Kamegawa, T. Tamura, H. Takamura, A. Matsukawa, S. Yamashita

Research output: Contribution to journalConference articlepeer-review

25 Citations (Scopus)


The effects of additional elements to the Ti-Cr alloys on their protium absorption-desorption properties were investigated. Although Ti-Cr alloys with a b.c.c. structure is expected to exhibit a high protium content, it is difficult to obtain single b.c.c. phase quenching from the high temperature. The effects of additional elements such as V, Mo, W, Nb, Ta, Ru, Rh, Re, Os, Ir etc. on stabilizing b.c.c. phase in the alloys were investigated. Then, it was found that the additions of V, Mo, W, Ru, Rh, Re, Os, Ir effectively stabilized b.c.c. phases. But the addition of Nb and Ta preferentially formed Laves phases. Specially, the addition of Mo and Ru is effective to stabilize the b.c.c. phases with high protium content. The Ti-Cr-(1∼2.5%)Mo alloys show almost same capacity of protium as that reported in Ti-Cr-(5-7.5)V alloys. The addition of Ru to Ti-Cr alloys also shows the capacity of 3.0 mass% protium. These V-free Ti-Cr alloys will be also suitable for the future applications.

Original languageEnglish
Pages (from-to)480-485
Number of pages6
JournalJournal of Alloys and Compounds
Publication statusPublished - 2003 Aug 11
EventProceedings of the Eight International Symposium on Metal Hyd (MH 2002) - Annecy, France
Duration: 2002 Sept 22002 Sept 6


  • BCC hydrogen absorbing alloys
  • High hydrogen content
  • Hydrogen absorbing alloys
  • Hydrogen alloys tanks for fuel cell
  • Ti-Cr-Mo alloys
  • Ti-Cr-Ru alloys
  • V-free Ti-Cr alloys


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