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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U2 - 10.1016/S0925-8388(02)01276-8
DO - 10.1016/S0925-8388(02)01276-8
M3 - Conference article
AN - SCOPUS:0041562603
VL - 356-357
SP - 326
EP - 329
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
T2 - Proceedings of the Eight International Symposium on Metal Hyd (MH 2002)
Y2 - 2 September 2002 through 6 September 2002
ER -