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Suzudo, Tomoaki; Hasegawa, Akira*
Scientific Reports (Internet), 6, p.36738_1 - 36738_6, 2016/11
Times Cited Count：27 Percentile：64.56(Multidisciplinary Sciences)Modeling of the evolution of radiation-induced defects is important for finding radiation-resistant materials, which would be greatly appreciated in nuclear applications. We apply the first principles method combined with kinetic Monte Carlo to indicate a mechanism to mitigate the effect of radiation by adding particular solute elements that change the migration dimension of interstitials in W crystals. The resultant mechanism is applicable to any body-centered-cubic (BCC) metals whose SIAs have one-dimensional (1D) motion and is expected to provide a general guideline for computational design of radiation-resistant alloys in the field of nuclear applications.
Tanigawa, Hiroyasu; Ozawa, Kazumi; Morisada, Yoshiaki*; Noh, S.*; Fujii, Hidetoshi*
Fusion Engineering and Design, 98-99, p.2080 - 2084, 2015/10
Times Cited Count：10 Percentile：64.63(Nuclear Science & Technology)The vacuum plasma spray (VPS) technique has been investigated as the most practical method to form Tungsten (W) layer as a plasma facing material in fusion devices. The issues are the thermal conductivity and the strength of VPS-W, i.e., the thermal conductivity of VPS-W were significantly lower than that of the bulk W, and the hardness of VPS-W is much less than that of the bulk W. These are mainly caused by the porous structure of VPS-W. In order to solve these issues, friction stir processing (FPS) was applied on VPS-W in this study. It was suggested that FSP can contribute to significant improvement both in mechanical and thermal properties of VPS-W coating.
Suzuki, Satoshi; Ueda, Yoshio*
Nihon Genshiryoku Gakkai-Shi, 47(4), p.266 - 271, 2005/04
no abstracts in English
Shimura, Kenichiro*; Yamaguchi, Kenji; Terai, Takayuki*; Yamawaki, Michio*
Journal of Physics and Chemistry of Solids, 66(2-4), p.684 - 689, 2005/02
Times Cited Count：1 Percentile：7.27(Chemistry, Multidisciplinary)no abstracts in English
Nagasaki, Takanori*; Yamaguchi, Kenji; Konishi, Satoshi*
Nihon Genshiryoku Gakkai-Shi, 46(11), p.770 - 779, 2004/11
no abstracts in English
Sato, Kazuyoshi; Ishitsuka, Etsuo; Uda, Minoru*; Kawamura, Hiroshi; Suzuki, Satoshi; Taniguchi, Masaki; Ezato, Koichiro; Akiba, Masato
Journal of Nuclear Materials, 283-287(2), p.1157 - 1160, 2000/12
Times Cited Count：6 Percentile：42.66(Materials Science, Multidisciplinary)no abstracts in English
Shu, Wataru; Oya, Yasuhisa
Purazuma, Kaku Yugo Gakkai-Shi, 76(10), p.1021 - 1028, 2000/10
no abstracts in English
Hayashi, Takumi; Ohira, Shigeru; Nakamura, Hirofumi; Tadokoro, Takahiro*; Shu, W.; Sakai, T.*; Isobe, Kanetsugu; Nishi, Masataka
Proceedings of Hydrogen Recycle at Plasma Facing Materials, p.213 - 221, 2000/00
no abstracts in English
Shu, W.
Purazuma, Kaku Yugo Gakkai-Shi, 75(4), p.409 - 415, 1999/04
no abstracts in English
Ueda, Shuzo; *; *
Journal of Nuclear Materials, 258-263, p.713 - 718, 1998/00
Times Cited Count：10 Percentile：63.67(Materials Science, Multidisciplinary)no abstracts in English
C-carbon fiber composite ceramics as plasma facing materials in nuclear fusion reactor, part 3; Heat resistance evaluation by electron beam irradiation and by in situ plasma discharge in JT-60*; Saido, Masahiro; Nakamura, Kazuyuki; Akiba, Masato; ; Dairaku, Masayuki; *; *; *; Goto, Yoshitaka*
Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 105(1228), p.1091 - 1098, 1997/12
Times Cited Count：1 Percentile：18.67(Materials Science, Ceramics)no abstracts in English
Saito, Tamotsu; K.Deng*; Nakano, Junichi; Yamada, Reiji
JAERI-Research 97-001, 18 Pages, 1997/01
JAERI-Research-97-001.pdf:0.85MB
no abstracts in English
Saito, Shigeru; *; *; Kawamura, Hiroshi
Functionally Graded Materials 1996, 0, p.215 - 220, 1996/00
no abstracts in English
Okuno, Kenji; Ohira, Shigeru; Hayashi, Takumi
Purazuma, Kaku Yugo Gakkai-Shi, 71(5), p.394 - 399, 1995/05
no abstracts in English
C-overlaid carbon fibre reinforced composites under disruption heat load conditionedNakamura, Kazuyuki; Akiba, Masato; Araki, Masanori; Dairaku, Masayuki; Sato, Kazuyoshi; ; ; Ando, Toshiro; *; Saido, Masahiro; et al.
Fusion Engineering and Design, 30, p.291 - 298, 1995/00
Times Cited Count：2 Percentile：28.65(Nuclear Science & Technology)no abstracts in English
Saido, Masahiro; Ando, Toshiro
Proc. of Japan-US Workshop P243 on High Heat Flux Components and Plasma Surface Interactions for Next, 0, p.107 - 118, 1995/00
no abstracts in English
C-overlaid graphite for keV energy deuterium ion irradiationGoto, Yoshitaka*; Yamaki, Takahiro*; Ando, Toshiro; Jimbo, Ryutaro*; Ogiwara, Norio; Saido, Masahiro; Teruyama, Kazuhiro*
Journal of Nuclear Materials, 196-198, p.708 - 712, 1992/12
Times Cited Count：19 Percentile：83.58(Materials Science, Multidisciplinary)no abstracts in English
Suzudo, Tomoaki; Tsuru, Tomohito; Hasegawa, Akira*
no journal, ,
Tungsten is expected to be a promising plasma-facing material for future fusion devices, but radiation-induced precipitation (RIP), which leads the material to hardening, is a concern at their practical use. One of the keys to accurate prediction of the emergence of RIP is stability and migration of solute atoms, rhenium (Re) and osmium (Os), that are produced by nuclear transmutation through irradiation. We conduct a series of numerical simulations using ab initio and an atomic kinetic Monte Carlo method to examine the behaviour of these solute elements. We find that tungsten interstitial atoms displaced by radiation favourably form mixed dumbbell with the solute atoms, and these mixed dumbbells have 3D motion instead of 1D motion of SIAs.
