Structure evolution of tungsten coatings exposed to plasma flows under ITER ELM relevant conditions
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Дата
2017
ORCID
DOI
Науковий ступінь
Рівень дисертації
Шифр та назва спеціальності
Рада захисту
Установа захисту
Науковий керівник
Члени комітету
Видавець
Kharkiv Institute of Physics and Technology
Анотація
Structure, substructure and stress parameters both on the surface and distributed by depth in the tungsten/steel coatings exposed to high energy hydrogen plasma fluxes were studied by X-ray diffraction methods. The hydrogen plasma exposure results in the following recrystallization processes in the thin surface layer of the coating: appearing the texture axis normal to the surface; increasing the coherence length from 60 nm in the initial state to 80 nm after the plasma exposure; completely annealed micro-strains; and dislocation density lowered twice in the exposed surface layer all these facts confirm the thermal character of the hydrogen plasma influence.
Опис
Ключові слова
tungsten coatings, plasma flows, hydrogen plasma, recrystallization processes, X-rays
Бібліографічний опис
Structure evolution of tungsten coatings exposed to plasma flows under ITER ELM relevant conditions / S. V. Malykhin [et al.] // Problems of atomic science and technology. Ser. : Plasma physics. – 2017. – No. 1 (107). – P. 123-125.