Erosion properties of tungsten and WTa5 alloy exposed to repetitive QSPA plasma loads below melting threshold
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Дата
2018
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
The damage of deformed double forged pure tungsten (W) and tungsten alloyed with 5 wt.% tantalum (WTa5) have been studied in experimental simulations of ITER-like transient events (surface heat load of 0.45 MJ/m² and the pulse duration of 0.25 ms) with quasi-stationary plasma accelerator QSPA Kh-50. The plasma exposures were performed for targets maintained at room temperature and preheated at 200 or 300°C. The large and fine cracks appeared in result of plasma impacts. The high number of repetitive plasma loads below the melting threshold led to the clear degradation of thermo-mechanical properties of the affected surface layers on tungsten. Comparative analysis of the cracks propagation to the bulk is presented for both W and WTa5 samples.
Опис
Ключові слова
tungsten, heat load, thermo-mechanical properties, plasma loads
Бібліографічний опис
Erosion properties of tungsten and WTa5 alloy exposed to repetitive QSPA plasma loads below melting threshold / V. A. Makhlai [et al.] // Problems of atomic science and technology. Ser. : Plasma physics. – 2018. – No. 6 (118). – P. 59-62.