Thermal cycling and high power density hydrogen ion beam irradiation of tungsten layers on tungsten substrate

19th Conference on Plasma Surface Interactions

Airapetov, A.A.^1 ; Begrambekov, L.B.^1 ; Gretskaya, I Yu^1 ; Grunin, A.V.^1 ; Dyachenko, M Yu^1 ; Puntakov, N.A.^1 ; Sadovskiy, Ya A.^1

National Research, Nuclear University, MEPhI (Moscow Engineering Physics Institute), 31 Kashirskoe highway, Moscow

115409, Russia^1

关键词: Deposited layer;    Fusion devices;    High power density;    Hydrogen ion irradiation;    Iron impurities;    Pore formation;    Tungsten layers;    Tungsten substrate;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/748/1/012009/pdf
DOI  :  10.1088/1742-6596/748/1/012009

来源: IOP

【 摘 要 】

Tungsten layers with iron impurity were deposited on tungsten substrates modeling re-deposited layers in a fusion device. The samples were tested by thermocycling and hydrogen ion beam tests. Thermocycling revealed globule formation on the surface. The size of the globules depended on iron impurity content in the coating deposited. Pore formation was observed which in some cases lead to exfoliation of the coatings. Hydrogen ion irradiation lead to formation of blisters on the coating and finally its exfoliation.