Simulation study of helium bubble coalescence in tungsten at various temperatures relevant to fusion conditions

Zhan, Jie; Okita, Tsuyoshi; Ye, Minyou; Kato, Daiji; Suzuki, Katsuyuki

doi:10.1016/j.commatsci.2020.110076

Cited by 21 publications

(2 citation statements)

References 36 publications

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“…The repulsive potential between W-He is strong, whereas the repulsive potential energy between He-He is weaker. As a result, He atoms tend to aggregate into He clusters and grow into He bubbles in pure W [26]. In contrast, in HEA, the He formation energy is lower compared to that in W, indicating that, relative to W, He is more likely be as solute within the HEA instead of forming He bubbles [27].…”

Section: Interfacial Effects Under High Energy He + Irradiationmentioning

confidence: 99%

Interfaces enhanced plasma irradiation resistance in CrMoTaWV/W multilayer films through blocking He diffusion

Qu,

Hong,

Wei

et al. 2024

Nucl. Fusion

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The performance of Plasma-facing materials (PFMs) is one of the key factors that significantly impact the stability of operation in fusion reactors. Herein, a new CrMoTaWV/W (HEA/W) multilayer structure is designed as PFM to investigate its resistance to He plasma irradiation. It was observed that the introduction of the interfaces effectively absorbed plenty of He atoms, preventing them from diffusing into the material and delaying the formation of fuzz incubation zone, therefore, enhancing the resistance to plasma irradiation. The thickness transformed to fuzz in the HEA/W multilayer films was observed to be about two-thirds of those in the CrMoTaWV (HEA) film. Additionally, the fuzz growth rates in HEA/W multilayer films are lower than the average growth rate of bulk W and HEA films. These findings highlight a promising new avenue for the exploration of high-performance PFMs.

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Section: Interfacial Effects Under High Energy He + Irradiationmentioning

confidence: 99%

Interfaces enhanced plasma irradiation resistance in CrMoTaWV/W multilayer films through blocking He diffusion

Qu,

Hong,

Wei

et al. 2024

Nucl. Fusion

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“…Smirnov et al [83] used MD to study the continuous growth of two adjacent helium bubbles until coalescence, and found that the two growing helium bubbles repel each other during the coalescence process. Zhan et al [84] simulated the coalescence conditions of small-sized helium bubbles (with a radius of 1-3 lattice constants). They found that the helium bubbles can coalesce when the distance between the two helium bubbles is less than one lattice constant.…”

Section: Helium Bubble Growthmentioning

confidence: 99%

Modeling tungsten response under helium plasma irradiation: a review

Yang¹,

Fan²

2022

Plasma Sci. Technol.

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Tungsten, a leading candidate for plasma facing materials (PFM) in future fusion devices, will be exposed to high-flux low-energy helium plasma under the anticipated fusion operation conditions. In the past two decades, experiments have revealed that exposure to helium plasma strongly modified the surface morphology and hence the sputtering, thermal and other properties of tungsten, posing a serious danger to the performance and the lifetime of tungsten and the steady-state operation of plasma. In this article, we provide a review of modeling and simulation efforts on the long-term evolution of helium bubbles, surface morphology, and property changes of tungsten exposed to low-energy helium plasma. The current gap and outstanding challenges to establish a predictive modeling capability for dynamic evolution of PFM are discussed.

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Numerical Simulation of Free Ascension and Coaxial Coalescence of Bubbles in Gas-Liquid System

Liu

Zhao

Guan

et al. 2022

Lecture Notes in Electrical Engineering

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Simulation study of helium bubble coalescence in tungsten at various temperatures relevant to fusion conditions

Cited by 21 publications

References 36 publications

Interfaces enhanced plasma irradiation resistance in CrMoTaWV/W multilayer films through blocking He diffusion

Interfaces enhanced plasma irradiation resistance in CrMoTaWV/W multilayer films through blocking He diffusion

Modeling tungsten response under helium plasma irradiation: a review

Numerical Simulation of Free Ascension and Coaxial Coalescence of Bubbles in Gas-Liquid System

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