Hydrogen and deuterium uptake in helium implanted layer of Mo and W

S. Nagata; B. Tsuchiya; N. Ohtsu; T. Sugawara; T. Shikama; K. Tokunaga; M. Takenaka; E. Kuramoto

doi:10.1016/S0022-3115(02)01581-7

Hydrogen and deuterium uptake in helium implanted layer of Mo and W

S. Nagata, B. Tsuchiya, N. Ohtsu, T. Sugawara, T. Shikama, K. Tokunaga, M. Takenaka, E. Kuramoto

Materials Design Division

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

7 Citations (Scopus)

Abstract

The accumulation of hydrogen isotopes in the helium (He) implanted layer of Mo and W single crystals was studied, focusing on the effects of the high dose irradiation of He ions and on uptake behavior of hydrogen (H) and deuterium (D) in various H₂ and D₂ pressure. A remarkable H uptake occurs in the He saturated layer of the crystals irradiated by 10 keV ⁴He ions to a dose about 2 × 10²² He/m², after the heat treatment up to 850 K. The integrated amount of retained H reaches the same values before the thermal release procedure, though H-uptake rates depend on the gas pressure. The H is preferentially uptaken in the He saturated layer, when D₂ and/or D₂O gas is introduced in the vacuum chamber. The large difference between the H- and D-uptake rates suggest the oxide formation at the crystal surface where the microstructure is significantly changed due to the He irradiation.

Original language	English
Pages (from-to)	279-283
Number of pages	5
Journal	Journal of Nuclear Materials
Volume	313-316
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/S0022-3115(02)01581-7
Publication status	Published - 2003 Mar 1
Event	Plasma - Surface Interactions in Controlled Fusion Devices - Gifu, Japan Duration: 2002 May 26 → 2002 May 31

Keywords

Helium irradiation
Hydrogen isotopes
Hydrogen uptake
Molybdenum
Tungsten

ASJC Scopus subject areas

Nuclear and High Energy Physics
Materials Science(all)
Nuclear Energy and Engineering

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title = "Hydrogen and deuterium uptake in helium implanted layer of Mo and W",

abstract = "The accumulation of hydrogen isotopes in the helium (He) implanted layer of Mo and W single crystals was studied, focusing on the effects of the high dose irradiation of He ions and on uptake behavior of hydrogen (H) and deuterium (D) in various H2 and D2 pressure. A remarkable H uptake occurs in the He saturated layer of the crystals irradiated by 10 keV 4He ions to a dose about 2 × 1022 He/m2, after the heat treatment up to 850 K. The integrated amount of retained H reaches the same values before the thermal release procedure, though H-uptake rates depend on the gas pressure. The H is preferentially uptaken in the He saturated layer, when D2 and/or D2O gas is introduced in the vacuum chamber. The large difference between the H- and D-uptake rates suggest the oxide formation at the crystal surface where the microstructure is significantly changed due to the He irradiation.",

keywords = "Helium irradiation, Hydrogen isotopes, Hydrogen uptake, Molybdenum, Tungsten",

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

year = "2003",

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doi = "10.1016/S0022-3115(02)01581-7",

language = "English",

volume = "313-316",

pages = "279--283",

journal = "Journal of Nuclear Materials",

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TY - JOUR

T1 - Hydrogen and deuterium uptake in helium implanted layer of Mo and W

AU - Nagata, S.

AU - Tsuchiya, B.

AU - Ohtsu, N.

AU - Sugawara, T.

AU - Shikama, T.

AU - Tokunaga, K.

AU - Takenaka, M.

AU - Kuramoto, E.

PY - 2003/3/1

Y1 - 2003/3/1

N2 - The accumulation of hydrogen isotopes in the helium (He) implanted layer of Mo and W single crystals was studied, focusing on the effects of the high dose irradiation of He ions and on uptake behavior of hydrogen (H) and deuterium (D) in various H2 and D2 pressure. A remarkable H uptake occurs in the He saturated layer of the crystals irradiated by 10 keV 4He ions to a dose about 2 × 1022 He/m2, after the heat treatment up to 850 K. The integrated amount of retained H reaches the same values before the thermal release procedure, though H-uptake rates depend on the gas pressure. The H is preferentially uptaken in the He saturated layer, when D2 and/or D2O gas is introduced in the vacuum chamber. The large difference between the H- and D-uptake rates suggest the oxide formation at the crystal surface where the microstructure is significantly changed due to the He irradiation.

AB - The accumulation of hydrogen isotopes in the helium (He) implanted layer of Mo and W single crystals was studied, focusing on the effects of the high dose irradiation of He ions and on uptake behavior of hydrogen (H) and deuterium (D) in various H2 and D2 pressure. A remarkable H uptake occurs in the He saturated layer of the crystals irradiated by 10 keV 4He ions to a dose about 2 × 1022 He/m2, after the heat treatment up to 850 K. The integrated amount of retained H reaches the same values before the thermal release procedure, though H-uptake rates depend on the gas pressure. The H is preferentially uptaken in the He saturated layer, when D2 and/or D2O gas is introduced in the vacuum chamber. The large difference between the H- and D-uptake rates suggest the oxide formation at the crystal surface where the microstructure is significantly changed due to the He irradiation.

KW - Helium irradiation

KW - Hydrogen isotopes

KW - Hydrogen uptake

KW - Molybdenum

KW - Tungsten

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U2 - 10.1016/S0022-3115(02)01581-7

DO - 10.1016/S0022-3115(02)01581-7

M3 - Conference article

AN - SCOPUS:0037346756

VL - 313-316

SP - 279

EP - 283

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

IS - SUPPL.

T2 - Plasma - Surface Interactions in Controlled Fusion Devices

Y2 - 26 May 2002 through 31 May 2002

ER -

Hydrogen and deuterium uptake in helium implanted layer of Mo and W

Abstract

Keywords

ASJC Scopus subject areas

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