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.
N1 - Funding Information:
A part of this work was performed under the inter-university cooperative research program of Research Institute for Applied Mechanics, Kyushu University.
PY - 2003/3
Y1 - 2003/3
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.
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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
SN - 0022-3115
VL - 313-316
SP - 279
EP - 283
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - SUPPL.
T2 - Plasma - Surface Interactions in Controlled Fusion Devices
Y2 - 26 May 2002 through 31 May 2002
ER -