Helium desorption studies on vanadium and V5Ti and V3Ti1Si alloys and their relevance to helium embrittlement

Federov, A.; Buitenhuis, G.P.; Veen, A. van; Ryazanov, A. I.; Evans, John H.; Witzenburg, W. van; Westerduin, K.T.

doi:10.1016/0022-3115(95)00137-9

Cited by 9 publications

(5 citation statements)

References 12 publications

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“…Therefore, two desorption peaks in the thermal desorption spectra can be expected. The desorption peak at 1200 K may correspond to the helium release from the inner bubbles, which has been suggested by many authors [9,10]. The other one at the lower temperature may be due to the rupture of surface blisters during annealing.…”

Section: Thermal Desorption Behavior Of Heliummentioning

confidence: 87%

Helium retention of vanadium alloy after energetic helium ion irradiation

Liu¹,

Yamada²,

Yamauchi³

et al. 2004

Fusion Engineering and Design

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Section: Thermal Desorption Behavior Of Heliummentioning

confidence: 87%

Helium retention of vanadium alloy after energetic helium ion irradiation

Liu¹,

Yamada²,

Yamauchi³

et al. 2004

Fusion Engineering and Design

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“…Further, some elements may also segregate GBs due to the different chemical composition between GBs and the surrounding bulk [55]. The fact that GBs are one of the most propitious sites for helium accumulations in V has already been demonstrated by Ryazanov and his group [56][57][58][59] and Satou et al [60]. Additionly, the sliding of GBs may be considered to be one of the principal mechanisms of plastic deformation for polycrystalline V at high temperatures (above 0.4T m , where T m is the melting point; in the present case T m is 1910ºC and so all the target temperatures considered here lie in this range) [5,61], which can be described as the relative displacement of the two constituent grains in the direction parallel to the boundary interface.…”

Section: Experimental Conditionsmentioning

confidence: 88%

Tuning surface porosity on vanadium surface by low energy He+ ion irradiation

Tripathi

Novakowski

Hassanein

2016

Applied Surface Science

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In the present study, we report on tuning the surface porosity on vanadium surfaces using highflux, low-energy He + ion irradiation as function of sample temperature. Polished, mirror-finished vanadium samples were irradiated with 100 eV He + ions at a constant ion-flux of 7.2  10 20 ions m-2 s-1 for 1 hour duration at constant sample temperatures in the wide range of 823-1173 K. Our results show that the surface porosity of V 2 O 5 (naturally oxidized vanadium porous structure, after taking out from UHV) is strongly correlated to the sample temperature and is highly tunable. In fact, the surface porosity significantly increases with reducing sample temperature and reaches up to ~87%. Optical reflectivity on these highly porous V 2 O 5 surfaces show ~0% optical reflectivity at 670 nm wavelength, which is very similar to that of "black metal". Combined with the naturally high melting point of V 2 O 5 , this very low optical reflectivity suggests potential application in solar power concentration technology. Additionally, this topdown approach guarantees relatively good contact between the different crystallites and avoids electrical conductivity limitations (if required). Since V 2 O 5 is naturally a potential photocatalytic material, the resulting sub-micron-sized cube-shaped porous structures could be used in solar water splitting for hydrogen production in energy applications.

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“…Under irradiation, the structural materials are subject to damages such as swelling [9], embrittlement [10] and blistering [11] triggered, enhanced or suppressed [12] by He resulting of (n, a) transmutation reactions. He atoms are usually trapped at grain boundaries, dislocations or voids [13,14].…”

Section: Introductionmentioning

confidence: 99%

Helium–vacancy interactions in vanadium and tantalum

Unn-Toc

Marinica

Jourdan

2018

Computational Materials Science

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In this paper we investigate the energy landscape of vacancy clusters in the presence of Helium in two materials, Vanadium and Tantalum. In order to address the relative stability of small vacancy-Helium clusters as well as the basic migration mechanisms we have used Density Functional Theory. The results of calculations are compared to experimental results, when available, and can be systematized in potentially simple laws that can be easily used subsequently in multi-scale techniques including kinetic Monte Carlo and cluster dynamics simulations.

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Helium desorption studies on vanadium and V5Ti and V3Ti1Si alloys and their relevance to helium embrittlement

Cited by 9 publications

References 12 publications

Helium retention of vanadium alloy after energetic helium ion irradiation

Helium retention of vanadium alloy after energetic helium ion irradiation

Tuning surface porosity on vanadium surface by low energy He+ ion irradiation

Helium–vacancy interactions in vanadium and tantalum

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