Hydrogen accumulation in the helium implanted surface of Mo single crystals

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

doi:10.1016/S0925-8388(02)01276-8

Hydrogen accumulation in the helium implanted surface of Mo single crystals

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

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Conference article › peer-review

6 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 language	English
Pages (from-to)	326-329
Number of pages	4
Journal	Journal of Alloys and Compounds
Volume	356-357
DOIs	https://doi.org/10.1016/S0925-8388(02)01276-8
Publication status	Published - Aug 11 2003
Event	Proceedings of the Eight International Symposium on Metal Hyd (MH 2002) - Annecy, France Duration: Sept 2 2002 → Sept 6 2002

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/S0925-8388(02)01276-8

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title = "Hydrogen accumulation in the helium implanted surface of Mo single crystals",

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.",

author = "S. Nagata and K. Tokunaga and B. Tsuchiya and N. Ohtsu and T. Sugawara and T. Shikama",

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note = "Proceedings of the Eight International Symposium on Metal Hyd (MH 2002) ; Conference date: 02-09-2002 Through 06-09-2002",

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TY - JOUR

T1 - Hydrogen accumulation in the helium implanted surface of Mo single crystals

AU - Nagata, S.

AU - Tokunaga, K.

AU - Tsuchiya, B.

AU - Ohtsu, N.

AU - Sugawara, T.

AU - Shikama, T.

PY - 2003/8/11

Y1 - 2003/8/11

N2 - 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.

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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DO - 10.1016/S0925-8388(02)01276-8

M3 - Conference article

AN - SCOPUS:0041562603

SN - 0925-8388

VL - 356-357

SP - 326

EP - 329

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

T2 - Proceedings of the Eight International Symposium on Metal Hyd (MH 2002)

Y2 - 2 September 2002 through 6 September 2002

ER -

Hydrogen accumulation in the helium implanted surface of Mo single crystals

Abstract

All Science Journal Classification (ASJC) codes

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