Конференции / Научные семинары
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КОЛЛЕКЦИЯ НАХОДИТСЯ В СТАДИИ РАЗРАБОТКИ
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Просмотр Конференции / Научные семинары по Автор "ALIMOV, V. KH."
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- ПубликацияОткрытый доступHYDROGEN ISOTOPE RETENTION IN REDUCED-ACTIVATION FERRITIC/MARTENSITIC STEELS(НИЯУ МИФИ, 2018) ALIMOV, V. KH.; OGORODNIKOVA, O. V.; SPITSYN, A. V.; BOBYR, N. P.; HATANO, Y.; ROTH, J.; SUGIYAMA, K.; BALDWIN, M.; DOERNER, R.; J.’T HOEN, M. H.; LEE, H. T.; UEDA, Y.; HAYASHI, T.; Огородникова, Ольга ВячеславовнаReduced Activation Ferritic/Martensitic (RAFM) steels such as Eurofer (EU), F82H (Japan), Rusfer EK-181 (Russia) are candidate materials for first wall and breeding blanket structural application in future fusion power plants. These steels have been developed in order to simplify special waste storage of highly radioactive structures of fusion reactor after service. With this objective some alloying elements such as Mo, Nb and Ni present in the commercial martensitic steels have been replaced by other elements such as Ta, W and V which exhibit faster decay of induced radioactivity.
- ПубликацияОткрытый доступSURFACE MODIFICATION AND SPUTTERING EROSION OF IRON EXPOSED TO LOW-ENERGY, HIGH FLUX DEUTERIUM PLASMAS SEEDED WITH METAL SPECIES(НИЯУ МИФИ, 2017) ALIMOV, V. KH.; HATANO, Y.; BALDEN, M.; OYAIZU, M.; ISOBE, K.; NAKAMURA, H.; HAYASHI, T.Fe targets surrounded with (i) 304 type stainless steel composed of mid-Z elements: Fe, Cr, Ni, and Mn (designated as Fe[304SS] targets) and with (ii) high-Z tungsten (designated as Fe[W] targets) were exposed to low-energy (140 and 200 eV), high flux (about 1022 D/m2s) deuterium (D) plasmas to fluences of 5×1025 and 1026 D/m2 at various temperatures. The surface morphology of the Fe targets is found to be dependent strongly on (i) atomic number of re-deposited species emerged from sputtering of the 304 type stainless steel (mid-Z elements) or tungsten (high-Z element) and on (ii) the exposure temperature. On the Fe[304SS] surface exposed at various temperatures to the D plasmas, only well-known topographical structures resulted from the variations of sput-tering yield with crystal orientation (ridges between different grains) are ob-served. By contrast, nano-structured layers enriched with tungsten are formed on the Fe[W] surfaces. Due to re-deposition of W particles and preferential sputtering of Fe, the effective W concentration in the outermost nano-structured layers reaches 60 at.%. Main physical processes occurring on the Fe[W] sur-face under D plasma exposure and influencing formation of the nano-structured surface layer are assumed to be sputtering, re-deposition, crystallite nucleation and growth due to surface atoms diffusion.