Molecular dynamics simulations of atomic carbon on tungsten surface

Yang, Zhongshi; Yang, Y.M.; Lü, Guang-Hong; Luo, Guang–Nan

doi:10.1016/j.jnucmat.2009.01.146

Cited by 10 publications

(3 citation statements)

References 12 publications

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“…The adsorption of Be will form a very thin film of Be-W alloy on the W surface [148,149]. The interaction between low-energy atomic C with W surface indicates that the unscattered C atoms are absorbed on the top W surface layer in the low-energy range below 10 eV, while the mean range increases with increasing incident energy above 10 eV, which is attributed probably to the channelling effect [150].…”

Section: Effects Of Alloying Elements At W Surfacesmentioning

confidence: 99%

A review of modelling and simulation of hydrogen behaviour in tungsten at different scales

2014

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Tungsten (W) is considered to be one of the most promising plasma-facing materials (PFMs) for next-step fusion energy systems. However, as a PFM, W will be subjected to extremely high fluxes of low-energy hydrogen (H) isotopes, leading to retention of H isotopes and blistering in W, which will degrade the thermal and mechanical properties of W. Modelling and simulation are indispensable to understand the behaviour of H isotopes including dissolution, diffusion, accumulation and bubble formation, which can contribute directly to the design, preparation and application of W as a PFM under a fusion environment. This paper reviews the recent findings regarding the behaviour of H in W obtained via modelling and simulation at different scales.

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Section: Effects Of Alloying Elements At W Surfacesmentioning

confidence: 99%

A review of modelling and simulation of hydrogen behaviour in tungsten at different scales

2014

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“…Tungsten (W) and W-alloys [1][2][3] are considered as the most promising plasma facing materials (PFMs) because of their low sputtering erosion and good thermal properties such as high thermal conductivity and high melting temperature. However, the PFMs can be irradiated by low-energy (1-100 eV) and high flux ($10 24 m À2 s À1 ) hydrogen (H) isotopes and helium (He) ions, which results in retention and bubble formation of H and He.…”

Section: Introductionmentioning

confidence: 99%

First-principles investigation of helium dissolution and clustering at a tungsten (1 1 0) surface

Wang

Zhang

Zhou

et al. 2015

Journal of Nuclear Materials

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“…The interaction energy between a W atom and a Be surface, and vice versa, is in qualitative agreement with ab initio calculations. Several groups have used this class of potentials to describe the plasma-wall interactions of D interacting with mixed W, C and Be materials before [23][24][25][26][27][28][29], as recently reviewed in [30].…”

Section: Methodsmentioning

confidence: 99%

The effect of beryllium on deuterium implantation in tungsten by atomistic simulations

2014

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Tungsten (W) and beryllium (Be) have been chosen as plasma-facing materials for the ITER reactor and the main fuel component will be deuterium (D). Due to plasma–wall interactions, these materials will immediately mix via erosion, transport and re-deposition. We present the first atomistic study on the effect of D co-implanted with Be into W, by modelling D plus Be irradiation of W surfaces, at projectile energies and compositions relevant for the plasma–wall interactions. The D implantation and Be sticking yields increased with the Be fraction in the system, especially at the lowest energies, as a Be layer was deposited on the surface. Tungsten was sputtered by Be, although the yield was partially suppressed by the deposited Be–D layer, and the Be erosion was determined by the balance between the Be concentration at the surface and projectile energy. Molecules were also sputtered: a large fraction of the D is reflected as D2, and purely metallic molecules (Be2, BeW) as well as different Be–D compounds were sputtered. On the other hand, the D clustered when implanted in or beneath a pre-deposited Be–W layer.

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Molecular dynamics simulations of atomic carbon on tungsten surface

Cited by 10 publications

References 12 publications

A review of modelling and simulation of hydrogen behaviour in tungsten at different scales

A review of modelling and simulation of hydrogen behaviour in tungsten at different scales

First-principles investigation of helium dissolution and clustering at a tungsten (1 1 0) surface

The effect of beryllium on deuterium implantation in tungsten by atomistic simulations

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