Behaviour of plasma facing materials under VDE

Merola, M.; Rödig, M.; Linke, J.; Duwe, R.; Vieider, G.

doi:10.1016/s0022-3115(98)00246-3

Cited by 12 publications

(4 citation statements)

References 4 publications

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“…While plasma disruptions and ELMs will have no significant thermal effects on the structural materials or coolant channels because of their short deposition time, VDE having longer duration time [13] could have destructive impact on these components. Therefore, modeling the response of structural materials to VDE has to integrate detailed energy deposition processes, surface vaporization, phase change and melting, heat conduction to coolant channels, and critical heat flux criteria at the coolant channels.…”

Section: Vertical Plasma Instability Events and Their Serious Damage mentioning

confidence: 99%

Impact of various plasma instabilities on reliability and performance of tokamak fusion devices

Hassanein

Sizyuk

et al. 2010

Fusion Engineering and Design

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Section: Vertical Plasma Instability Events and Their Serious Damage mentioning

confidence: 99%

Impact of various plasma instabilities on reliability and performance of tokamak fusion devices

Hassanein

Sizyuk

et al. 2010

Fusion Engineering and Design

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“…Due to the potential application based on the highthermal conductivity and low coefficients of thermal expansion (CTEs), tungsten (W) is increasingly considered as a promising plasma-facing material (PFM) for use in modern tokamak facilities with medium to high heat flux components (e.g., EAST and ASDEX). However, using W as a PEM has some shortcomings: brittle at room temperature, high ductile to brittle transition temperature (DBTT) because of the body-centeredcubic (bcc) lattice, heavy weight, and poor workability, as well as poor thermal conductivity [1,2] . One of the solutions to these troubles is to coat W on the copper (Cu) body or its alloy surface, which possesses an excellent thermal conductivity, superb ductility and regeneratibility.…”

Section: Introductionmentioning

confidence: 99%

Characterization of W Coating on Cu Substrate Prepared by Double-Glow Discharge

Zhang¹,

Wang²,

Chen³

et al. 2012

Plasma Sci. Technol.

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In this study, tungsten (W) was coated on a copper (Cu) substrate by using doubleglow discharge technique using a pure W panel as the target and argon (Ar) as the discharge and sputtering gas. The crystal structure of the W coating was examined by X-ray diffraction (XRD). Scanning electron microscopy (SEM) was performed with cross-section images to investigate the penetration depth of W into the Cu body. Additionally, the properties of wearability resistance, corrosion resistance and mechanical strength of the W coated Cu matrix were also measured. It is concluded that in double-glow plasma, W coated Cu can be facilely prepared. It is noticed that the treatment temperature heavily dominates the properties of the W-Cu composite.

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“…Especially during intense transient thermal loads such as ELMs (edge localized modes), plasma disruptions, and VDEs (vertical displacement events), irreversible damage might occur [1,2]. For carbon based materials crack formation, dust generation, and sublimation are the main erosion mechanisms [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…For refractory metals like W, ablation, crack and droplet formation, and melting are major erosion processes which limit the lifetime of the components [2,8]. In particular, the dust formation of W associated with evaporation and droplet formation is a radiological safety issue because neutron irradiated tungsten is highly radioactive.…”

Section: Introductionmentioning

confidence: 99%