Hydrogen isotope interaction with V-alloys

Залужный, А. Г.; Tebus, V.; Riazantseva, N.N.; Kopytin, V.N.; Voloshin, L.A.; Torubarov, D.I.; Cherednichenko-Alchevski, M.V.

doi:10.1016/s0920-3796(98)00208-7

Cited by 5 publications

(6 citation statements)

References 8 publications

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“…The solubility K S was independent of the surface conditions as expected and determined to be K S ¼ 2:1 Â 10 À6 Á exp ð32:6 kJ mol À1 =RT Þ where R is the gas constant and T the temperature. This value agreed well with the data for V-4Cr-4Ti alloy reported in the literature [14][15][16].…”

Section: Absorption Rate Measurementssupporting

confidence: 92%

Influence of heat treatment on hydrogen ingress into V–4Cr–4Ti alloy

Hayakawa

Hatano

Fukumoto

et al. 2004

Journal of Nuclear Materials

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Section: Absorption Rate Measurementssupporting

confidence: 92%

Influence of heat treatment on hydrogen ingress into V–4Cr–4Ti alloy

Hayakawa

Hatano

Fukumoto

et al. 2004

Journal of Nuclear Materials

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“…The difference in between H 2 and D 2 was rather small and within the spread of data points under the present conditions. Figure 7 shows the temperature dependence of the solubility K S of D together with the data previously obtained for H 13) and those reported by other researchers [18][19][20] for V4Cr-4Ti alloys. In this evaluation of K S , the deuterium concentration C D was defined as the atomic concentration ratio of deuterium to the metallic elements, [D]/ [M].…”

Section: Change In the Surface State By Heat Treatmentsupporting

confidence: 56%

“…This result is similar to those of other researchers. 18,21) Zaluzhnyi et al and reported that there was no observable isotope effect for either alloy. Lässer 21) reviewed the isotope effect on K S in pure V and showed that the difference between H and D is small above 473 K. On the other hand, according to Lässer,21) there is a significant isotope effect in a lower temperature region (below 473 K), and the difference between H and D increases with decreasing temperature.…”

Section: Change In the Surface State By Heat Treatmentmentioning

confidence: 96%

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Surface Segregation of Ti in a V-4Cr-4Ti Alloy and Its Influence on the Surface Reaction Rates of Hydrogen Isotopes

et al. 2005

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The change in the chemical surface state of a V-4Cr-4Ti alloy after heat treatments in vacuum at temperatures from 573 to 1273 K was investigated by means of X-ray photoelectron spectroscopy. Before heating, the surface of the as-polished alloy was covered with a V oxide film. Diffusion of oxygen into the bulk started at around 673 K, and the alloy surface gradually became metallic. Oxygen, however, did not disappear from the surface completely. Surface segregation of Ti was observed as the temperature increased. The concentration of Ti reached 20 at% at 1273 K. No significant segregation of Cr or other impurities were observed. This surface segregation of Ti significantly reduced the surface reaction rates of H 2 and D 2 . The isotope effect on the surface reaction rates of H 2 and D 2 was not observed under the present experimental conditions.

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“…Figure 15. Solubility of hydrogen in V and its alloys [123,197,[230][231][232][233]. The bold line represents the relationship for pure V, reported in Ref.…”

Section: Why Barriers Are Needed For Fusion Reactorsmentioning

confidence: 99%

Tritium Barriers and Tritium Diffusion in Fusion Reactors

Causey

Karnesky

Marchi

2012

Comprehensive Nuclear Materials

132

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Tritium and deuterium induce radiation in reactor materials and some radioactive tritium gas may be released. Most of the materials used in fusion reactors are metals that have relatively high permeabilities for tritium. The fusion community has been working on barriers to minimize tritium release. Unfortunately, most barrier materials work very well during laboratory experiments, but fail to meet requirements when placed in radiation environments.This chapter presents tritium permeation characteristics of various materials used in fusion reactors, including plasma-facing, structural, and barrier materials. The necessary parameters for tritium release calculations for various regions of a fusion reactor are given.

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Hydrogen isotope interaction with V-alloys

Cited by 5 publications

References 8 publications

Influence of heat treatment on hydrogen ingress into V–4Cr–4Ti alloy

Influence of heat treatment on hydrogen ingress into V–4Cr–4Ti alloy

Surface Segregation of Ti in a V-4Cr-4Ti Alloy and Its Influence on the Surface Reaction Rates of Hydrogen Isotopes

Tritium Barriers and Tritium Diffusion in Fusion Reactors

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