Deuterium retention in tungsten exposed to low-energy, high-flux clean and carbon-seeded deuterium plasmas

Alimov, V.Kh.; Roth, J.; Causey, R.A.; Комаров, Д. А.; Linsmeier, Ch.; Wiltner, A.; Kost, F.; Lindig, S.

doi:10.1016/j.jnucmat.2008.01.008

Cited by 70 publications

(23 citation statements)

References 61 publications

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“…blisters, however, D is most likely trapped as D 2 gas under high pressure, as the disappearance of the blisters after TDS or after puncturing the blister with the FIB suggests. This conclusion is also supported by the by the results presented in [8]. …”

Section: Discussionsupporting

confidence: 80%

Influence of the microstructure on the deuterium retention in tungsten

Manhard

Schmid

Balden

et al. 2011

Journal of Nuclear Materials

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The microstructure of tungsten samples is systematically modified by recrystallization to investigate the structure dependence of deuterium (D) retention. After a thorough characterization by scanning and transmission electron microscopy, nonrecrystallized samples and samples recrystallized by different degrees are loaded with deuterium in a low-temperature plasma device. The deuterium inventory is measured by nuclear reaction analysis and thermal desorption spectroscopy. The post implantation surface morphology is investigated by scanning electron, optical and atomic force microscopy. The modification by recrystallization allows a wide variation in the crystallite size and has a strong impact on the measured D retention. Both the total amount and the binding state of the retained D are changed.

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Section: Discussionsupporting

confidence: 80%

Influence of the microstructure on the deuterium retention in tungsten

Manhard

Schmid

Balden

et al. 2011

Journal of Nuclear Materials

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“…It is not easy to interpret the absence of blistering on the not N-implanted W sample after D loading at 500 K, since no comparable experimental conditions (ion energy, temperature and fluence) can be found in literature. It was reported that the critical temperature for blister suppression is 700 K [18], however, the ion flux in that work was much higher than the present one. A corresponding check of this issue is planned for the future.…”

Section: Methodscontrasting

confidence: 75%

Influence of nitrogen pre-implantation on deuterium retention in tungsten

et al. 2014

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Abstract:The influence of nitrogen (N) pre-implantation on the deuterium (D) retention in tungsten (W) at different temperatures was investigated. Bulk W samples were exposed to D plasma with a fluence of 110 24 D/m 2 with or without nitrogen pre-implantation at 300 K and 500 K, respectively. Nuclear reaction analysis was applied for the determination of N content and D retention in the near surface. Optical microscopy was used to investigate the surface modification by blistering after implantation. It is shown that, the W:N layers formed during the N preimplantation play very different roles on D retention and blistering in the samples at different temperatures. At 500 K, the W:N layer seems to enhance D diffusion into the bulk by suppressing D loss from the surface, which results in a much higher D concentration in the bulk and larger blisters than without N pre-implantation. At 300 K, the effect of this layer is much less pronounced than that at 500 K.

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“…The manufacturer quoted a purity of better than 99.99 wt%, which is roughly ten times better than the purity of other standard commercial products. It was reported that commercial SC tungsten with a purity of 99.9 wt% has a H impurity content ranging from 0.02 to 0.1 at% [15,16]. Hence, it is reasonable to assume that the H content in the as-delivered SC tungsten samples used in this study was less than 0.01 at%.…”

Section: Specimen Preparationmentioning

confidence: 93%

Effect of hydrogen on the slip resistance of tungsten single crystals

Yao

Wang

Manhard

et al. 2013

Materials Science and Engineering: A

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The intense influx of hydrogen plasma onto the tungsten wall of a nuclear fusion reactor causes severe microstructural damage in the near-surface layer. The evolution of hydrogen-induced damage is often promoted by local plastic flow. Since hydrogen solutes are known to lower the hardness of many metals, the question arises as to the extent to which the tungsten walls are softened by the implantation of hydrogen. In this study, we investigated the change in slip resistance of tungsten single crystals following deuterium implantation. To determine the inherent yield stress of tungsten, we performed nanoindentation on high-purity single crystals. The statistical distribution of pop-in stresses (yield stress upon a single slip) revealed a significant reduction in pop-in load upon hydrogen implantation. In addition, the average stress at pop-in was found to be a function of crystallographic orientation of the samples, with much larger pop-in loads observed on (100) and (110) surface planes than on (111) surfaces.

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Deuterium retention in tungsten exposed to low-energy, high-flux clean and carbon-seeded deuterium plasmas

Cited by 70 publications

References 61 publications

Influence of the microstructure on the deuterium retention in tungsten

Influence of the microstructure on the deuterium retention in tungsten

Influence of nitrogen pre-implantation on deuterium retention in tungsten

Effect of hydrogen on the slip resistance of tungsten single crystals

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