Hydrogen accumulation in the helium implanted surface of Mo single crystals

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

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

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
Volume356-357
DOIs
Publication statusPublished - Aug 11 2003
EventProceedings of the Eight International Symposium on Metal Hyd (MH 2002) - Annecy, France
Duration: Sep 2 2002Sep 6 2002

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Helium
Hydrogen
Single crystals
Deuterium
Contamination
Irradiation
Vacuum
Ions
Temperature

All Science Journal Classification (ASJC) codes

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

Cite this

Hydrogen accumulation in the helium implanted surface of Mo single crystals. / Nagata, S.; Tokunaga, K.; Tsuchiya, B.; Ohtsu, N.; Sugawara, T.; Shikama, T.

In: Journal of Alloys and Compounds, Vol. 356-357, 11.08.2003, p. 326-329.

Research output: Contribution to journalConference article

Nagata, S. ; Tokunaga, K. ; Tsuchiya, B. ; Ohtsu, N. ; Sugawara, T. ; Shikama, T. / Hydrogen accumulation in the helium implanted surface of Mo single crystals. In: Journal of Alloys and Compounds. 2003 ; Vol. 356-357. pp. 326-329.
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AU - Nagata, S.

AU - Tokunaga, K.

AU - Tsuchiya, B.

AU - Ohtsu, N.

AU - Sugawara, T.

AU - Shikama, T.

PY - 2003/8/11

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AB - 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.

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