Publication: Self-passivating smart tungsten alloys for DEMO: a progress in joining and upscale for a first wall mockup
Дата
2021
Авторы
Bachurina, D.
Tan, X. -Y.
Klein, F.
Suchkov, A.
Litnovsky, A.
Schmitz, J.
Gonzalez-Julian, J.
Bram, M.
Coenen, J. W.
Wu, Y. -C.
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Self-passivating, so-called smart alloys are under development for a future fusion power plant. These alloys containing tungsten, chromium and yttrium must possess an acceptable plasma performance during a regular plasma operation of a power plant and demonstrate the suppression of non-desirable oxidation of tungsten in case of an accident. The up-scaling of the bulk smart alloys to the reactor-relevant sizes has begun and the first samples with a diameter of 50 mm and thickness of 5 mm became available. The samples feature high relative density of above 99% and good homogeneity. With production of bulk samples, the research program on joining the smart alloy to the structural material was initiated. In a present study, the novel titanium–zirconium–beryllium braze was applied successfully to join the smart alloy to the Rusfer-reduced-activation steel. The braze has survived at least a hundred of cyclic thermal excursions in the range of 300–600 °C without mechanical destruction. © 2021, The Author(s).
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Self-passivating smart tungsten alloys for DEMO: a progress in joining and upscale for a first wall mockup / Bachurina, D. [et al.] // Tungsten. - 2021. - 3. - № 1. - P. 101-115. - 10.1007/s42864-021-00079-5