Results 221 to 230 of about 29,000 (256)
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Gas- and plasma-driven hydrogen permeation through a reduced activation ferritic steel alloy F82H
Journal of Nuclear Materials, 2014Abstract The first wall of a magnetic fusion power reactor will be subjected to hydrogen isotope permeation by the two mechanisms: one is gas-driven and the other is plasma-driven. Hydrogen transport through a reduced activation ferritic steel alloy F82H has been investigated using a steady-state laboratory-scale plasma device.
Haishan Zhou +4 more
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Chemical Engineering Journal, 2009
Abstract The hydrogen permeance of Pd 0.75 Ag 0.25 membranes was measured in the presence of pure H 2 or mixtures of H 2 with CO and H 2 O at temperatures in the range of 300–773 K and at atmospheric pressure under gas-driven permeation (GDP) and plasma-driven permeation (PDP). The Arrhenius plots of the permeability through these membranes versus
Thu Hoai Nguyen +2 more
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Abstract The hydrogen permeance of Pd 0.75 Ag 0.25 membranes was measured in the presence of pure H 2 or mixtures of H 2 with CO and H 2 O at temperatures in the range of 300–773 K and at atmospheric pressure under gas-driven permeation (GDP) and plasma-driven permeation (PDP). The Arrhenius plots of the permeability through these membranes versus
Thu Hoai Nguyen +2 more
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Journal of Nuclear Materials, 1984
Abstract The effect of incident ion energy on plasma driven permeation of deuterium through 304 stainless steel has been studied experimentally. The relationship of permeation rate to ion induced surface composition changes was determined by in situ Auger electron spectroscopy.
R.A. Causey, R.A. Kerst, B.E. Mills
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Abstract The effect of incident ion energy on plasma driven permeation of deuterium through 304 stainless steel has been studied experimentally. The relationship of permeation rate to ion induced surface composition changes was determined by in situ Auger electron spectroscopy.
R.A. Causey, R.A. Kerst, B.E. Mills
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Coating effect on plasma-driven permeation of hydrogen in iron
Fusion Engineering and Design, 1995Abstract The coating effect on plasma-driven permeation has been investigated with an incident energy of 750–3000 eV and an incident flux of (0.3–6.0) × 1017 ions m−2 s−1. Pure Fe (more than 99.95%) discs were coated with thin films of Pd or Au by r.f. sputtering on the front or the back. A good linear relationship was observed between the permeation
W.M Shu, Y Hayashi
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Estimation of permeation probability in plasma driven permeation
Fusion Engineering and Design, 1998Abstract Hydrogen permeation experiments were carried out with different thickness of Ni membranes; 20, 50 and 200 μm, pre-conditioned for the same surface conditions. Hydrogen plasma was created by ECR heating and plasma driven permeation (PDP) through the Ni membrane of 523 K was investigated.
M. Takizawa +4 more
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Surface condition effects on plasma driven permeation
Journal of Nuclear Materials, 1997Abstract Low energy plasma driven permeation (PDP) experiments were conducted with deuterium and a 10 μm type 304 SS membrane. Adsorbed non-hydrogen molecules like H2O or D2O on the upstream surface reduced the gas driven permeation (GDP) rate but enhanced the PDP rate.
M. Takizawa +3 more
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Surface recombination of hydrogen in plasma-driven permeation
Journal of Nuclear Materials, 1995Abstract Recombination coefficients of hydrogen on the front side and the back side, k f and k b , have been modeled respectively. For k f , both the normal-surface sites and the imperfection-surface sites produced by the energetic ions are taken into account, and the mixed effects of imperfections and contaminants adsorbed at imperfections ...
W.M. Shu, Y. Hayashi, K. Okuno
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RF plasma-driven hydrogen permeation through a biased iron membrane
Journal of Nuclear Materials, 1984Abstract The steady-state RF plasma-driven hydrogen permeation through an electrically biased iron membrane has been investigated as a function of the bias potential V M for membrane temperatures in the range of 150–400°C. V M has been gradually increased positively from the floating potential of the membrane.
T. Banno, F. Waelbroeck, J. Winter
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Hydrogen Plasma-Driven Permeation through a Reduced Activation Ferritic Steel Alloy F82H
Fusion Science and Technology, 2013Hydrogen plasma-driven permeation (PDP) experiments have been conducted, using a steady state linear plasma device for the membranes made of reduced activation ferritic steel (F82H) and stainless s...
H. Zhou +4 more
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The effect of He-induced surface microstructure on D plasma-driven permeation through RAFM steel
Nuclear Fusion, 2022Abstract The effect of helium (He)-induced surface microstructure on deuterium (D) plasma-driven permeation through a reduced activation ferritic/martensitic steel CLF-1 has been studied. CLF-1 steel was pre-exposed by He plasma with ion fluence of 1022–1024 He m−2 and an incident energy of 100 eV at 708 K.
Lu Wang +6 more
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