Retention and desorption behavior of helium in oxidized V–4Cr–4Ti alloy

Oku, D. E.; Yamada, Tsuyoshi; Hirohata, Yuko; Yamauchi, Yuji; Hino, Tomoaki

doi:10.1016/j.jnucmat.2007.03.068

Cited by 17 publications

(9 citation statements)

References 17 publications

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“…It is noteworthy that the helium yield temperature (590K) and the calculated activation energy of the third peak see Table 1, are close to helium yield temperature (600K) and the activation energy for low-temperature helium implantation on an accelerator. The activation energies in Table 1 were calculated using the Redhead formula [9,12]:…”

Section: Resultsmentioning

confidence: 99%

“… Accumulation of transmutant helium due to nuclear reactions under neutron irradiation, which results in embrittlement, increased swelling and creep [7][8].  Exotic methods of defect-free helium injection into studied material, which also leads to a change in properties [9]. Experimental studies the level and forms of helium accumulation mainly carried out by the methods of thermal desorption spectroscopy (TDS), using the results of computer modeling for the analysis of experiments: binding energies of helium atoms with crystal lattice defects (vacancies, dislocations, etc.…”

Section: Introductionmentioning

confidence: 99%

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Helium accumulation in Cr₁₈Ni₁₀Ti austenitic steel under different saturation methods

Akayev

Ganeev

Dikov

et al. 2022

J. Phys.: Conf. Ser.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Helium accumulation in Cr₁₈Ni₁₀Ti austenitic steel under different saturation methods

Akayev

Ganeev

Dikov

et al. 2022

J. Phys.: Conf. Ser.

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“…The usefulness of V as a structural material for future DEMO fusion reactors will depend, in part, on the influence of He on mechanical and structural properties. Even at relatively low concentrations, He may potentially cause material embrittlement [6]; at higher concentrations, He can lead to the formation of He bubbles [6][7][8][9] and void swelling [10,11]. Consequently, the influence of He content in V is an important issue and requires more investigations [3].…”

Section: Introductionmentioning

confidence: 99%

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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“…Several experi-mental and theoretical studies have demonstrated that C and N are the most frequent foreign interstitial atoms in the realistic vanadium and vanadium-based alloy materials. [20][21][22][23][24][25][26] Experimentally, some basic behaviors of C and N in vanadium-based alloys have been investigated. For example, in Ref.…”

Section: Introductionmentioning

confidence: 99%

Energetics of carbon and nitrogen impurities and their interactions with vacancy in vanadium

Hua

Liu

et al. 2016

Chinese Phys. B

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We studied the energetic behaviors of interstitial and substitution carbon (C)/nitrogen (N) impurities as well as their interactions with the vacancy in vanadium by first-principles simulations. Both C and N impurities prefer the octahedral site (O-site). N exhibits a lower formation energy than C. Due to the hybridization between vanadium-d and N/C-p, the N-p states are located at the energy from −6.00 eV to −5.00 eV, which is much deeper than that from −5.00 eV to −3.00 eV for the C-p states. Two impurities in bulk vanadium, C-C, C-N, and N-N can be paired up at the two neighboring Osites along the 111 direction and the binding energies of the pairs are 0.227 eV, 0.162 eV, and 0.201 eV, respectively. Further, we find that both C and N do not prefer to stay at the vacancy center and its vicinity, but occupy the O-site off the vacancy in the interstitial lattice in vanadium. The possible physical mechanism is that C/N in the O-site tends to form a carbide/nitride-like structure with its neighboring vanadium atoms, leading to the formation of the strong C/N-vanadium bonding containing a covalent component.

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Retention and desorption behavior of helium in oxidized V–4Cr–4Ti alloy

Cited by 17 publications

References 17 publications

Helium accumulation in Cr₁₈Ni₁₀Ti austenitic steel under different saturation methods

Helium accumulation in Cr₁₈Ni₁₀Ti austenitic steel under different saturation methods

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

Energetics of carbon and nitrogen impurities and their interactions with vacancy in vanadium

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Retention and desorption behavior of helium in oxidized V–4Cr–4Ti alloy

Cited by 17 publications

References 17 publications

Helium accumulation in Cr18Ni10Ti austenitic steel under different saturation methods

Helium accumulation in Cr18Ni10Ti austenitic steel under different saturation methods

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

Energetics of carbon and nitrogen impurities and their interactions with vacancy in vanadium

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Product

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Helium accumulation in Cr₁₈Ni₁₀Ti austenitic steel under different saturation methods

Helium accumulation in Cr₁₈Ni₁₀Ti austenitic steel under different saturation methods