Hydrogen accumulation in the helium implanted surface of Mo single crystals

S. Nagata, K. Tokunaga, B. Tsuchiya, N. Ohtsu, T. Sugawara, Tatsuo Shikama

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)


The up-take behavior of hydrogen and deuterium was studied for the surface layer of Mo single crystals irradiated by 10 keV He ions with a high dose, at which the blisters and exfoliation were formed on the surface. Hydrogen accumulation was found in the H saturated layer up to a maximum concentration of about 0.2 H/Mo at room temperature. Although the up-taken H concentration profiles and the morphological changes of the irradiated surface depended on irradiation temperatures, thermal release behavior of up-taken H were similar for both specimens irradiated at 295 and 820 K. The higher pressure of H2 and/or H2O caused the quicker accumulation of H, and the hydrogen dissociation seemed to be sensitive to the surface contamination. The up-take rate for H was an order of magnitude larger than that for D, even by letting mainly D2 and/or D2O into the vacuum chamber.

Original languageEnglish
Pages (from-to)326-329
Number of pages4
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


  • Ion impact
  • Metals
  • Surfaces

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


Dive into the research topics of 'Hydrogen accumulation in the helium implanted surface of Mo single crystals'. Together they form a unique fingerprint.

Cite this