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Saito, Shigeru; Suzuki, Kazuhiro; Hatakeyama, Yuichi; Suzuki, Miho; Dai, Y.*
Journal of Nuclear Materials, 534, p.152146_1 - 152146_16, 2020/06
Times Cited Count:1 Percentile:11.8(Materials Science, Multidisciplinary)A post-irradiation examination (PIE) was performed on the tensile specimens prepared from the MEGAPIE (MEGAwatt Pilot Experiment) target which were irradiated in flowing lead-bismuth eutectic (LBE). Thicknesses of the specimens were over two times larger than that of the standard specimen. The PIE revealed that the T91 specimens showed a 1.5-2.0 times larger total elongation (TE) compared to the literature values for a specimen with standard t/w (ratio of thickness to width). It could be suggested that the t/w and TE were strongly correlated. Then, we tried to investigate the effects of the t/w on the TE by comparing unirradiated specimens. We found that there was no t/w dependence on the strength and uniform elongation. On the other hand, the TE increases with increasing t/w. Based on the experimental data, we correlated the TE with various specimens t/w to estimate appropriate TE values, including that for the standard specimen.
Hayano, Akira; Ishii, Eiichi
Shigen, Sozai Koenshu (Internet), 5(1), 9 Pages, 2018/03
no abstracts in English
Saito, Takumi; Hamamoto, Takafumi*; Mizuno, Takashi; Iwatsuki, Teruki; Tanaka, Satoru*
Journal of Analytical Atomic Spectrometry, 30(6), p.1229 - 1236, 2015/06
Times Cited Count:13 Percentile:60.61(Chemistry, Analytical)Size distribution and elemental compositions of colloids in granitic and sedimentary deep groundwater was determined by flow field flow fractionation (Fl-FFF) combined with ICP-MS. In the granitic groundwater organic colloids and various inorganic elements were found in limited size ranges (10 nm and 140 nm). The presence of different types of organic colloids was suggested in this groundwater. Most of the inorganic elements exhibited similar size distributions at 10 nm, which were largely overlapped with organic colloids rich in fluorophores. In the sedimentary groundwater small organic and probably inorganic colloids were found at 5 nm together with relatively large inorganic colloids. Organic colloids in this groundwater were homogeneous in terms of their sizes and the compositions of chromohores and fluorophores. The size distribution of inorganic elements depended on their types, indicating the presence of different host colloidal phases for them.
Kumagai, Masayoshi*; Akita, Koichi; Imafuku, Muneyuki*; Oya, Shinichi*
Advanced Materials Research, 996, p.39 - 44, 2014/08
Times Cited Count:6 Percentile:93.33(Engineering, Mechanical)The microstructural features of shot and laser peened austenitic stainless steels were studied using line profile analysis with X-rays. Although both specimens had similar residual stress profiles toward the depth direction, the microstructural features were different not only on the original surfaces of the specimens but also to several micrometers in depth. The dislocation densities of the SP specimen were greater than that of the LP specimen. And the crystallite sizes of the SP specimen were smaller than that of the LP specimen.
Fukui, Hironobu*; Hamaguchi, Masafumi*; Yoshimura, Hisao*; Oyamatsu, Hisato*; Matsuoka, Fumitomo*; Noguchi, Tatsuo*; Hirao, Toshio; Abe, Hiroshi; Onoda, Shinobu; Yamakawa, Takeshi; et al.
Proceedings of the 6th International Workshop on Radiation Effects on Semiconductor Devices for Space Application (RASEDA-6), p.169 - 172, 2004/10
no abstracts in English
Wakai, Eiichi; Matsukawa, Shingo; Yamamoto, Toshio*; Kato, Yoshiaki; Takada, Fumiki; Sugimoto, Masayoshi; Jitsukawa, Shiro
Materials Transactions, 45(8), p.2641 - 2643, 2004/08
Times Cited Count:6 Percentile:41.09(Materials Science, Multidisciplinary)no abstracts in English
Takahashi, Shuichi*; Yoshida, Masaru; Asano, Masaharu; Nakagawa,Tsutomu*
Polymer Journal, 36(1), p.50 - 53, 2004/01
Times Cited Count:4 Percentile:12.7(Polymer Science)The poly(ethylen terephthalate)(PET) membrane, which has a membrane thickness of 12m, was used in this study. PET is a polymer widely used for fibers, films and bottles. It was assumed that for PET, which is often used as a gas barrier film, it is easy to effect changes in its gas permeability by modification, such as by ion irradiation. Previously, I reported the effect of heavy ion irradiation on the gas permeation of a PET membrane. A portion of the heavy ion irradiated PET membranes exhibited the Knudsen flow during the gas permeation measurements. As a next step, therefore, I applied an etching technique utilizing NaOH solution to control the nanosized pore of the heavy ion irradiated PET membrane. PET membranes irradiated at a fluence of 310 ions/cm were etched in 6N or 1N NaOH solution at 60C. The etching time was controlled to observe the changes in the gas permeation behavior depended on the etchig. This objective has consequently been used to control the Knudsen flow.
Yamaki, Tetsuya; Ito, Hisayoshi; Matsubara, Masakazu*; Abe, Hiroaki*; Asai, Keisuke*
Transactions of the Materials Research Society of Japan, 28(3), p.879 - 882, 2003/10
Titanium oxide nanoparticles were formed by pulsed laser ablation of a TiO rutile pellet with a KrF excimer laser ( = 248 nm). The ablation was performed in atmospheres of Ar and O at total pressures ranging from 0.2 and 10 Torr. At a higher pressure than 1 Torr, Ti in the nanoparticles had an oxidation state of 4+ to form TiO. According to the X-ray diffraction analyses, the nanopartiles were found to contain both the anatase and rutile phases, which crystallized through extremely energetic, non-equilibrium reactions in an ablation plume. In contrast, at pressures of 0.2 and 0.5 Torr, the nanoparticles were composed of dominant TiO with a small amount of a less oxidized phase such as TiO. The important result is that the XRD patterns of the samples prepared at 1 and 5 Torr showed the different anatase-to-rutile ratio of the peak intensities. This indicates that the weight fraction of the rutile/anatase crystalline phases can be controlled by the ambient gas pressure.
Takase, Kazuyuki; Yoshida, Hiroyuki; Ose, Yasuo*; Tamai, Hidesada; Kano, Takuma; Akimoto, Hajime
Nihon Konsoryu Gakkai Nenkai Koenkai 2003 Koen Rombunshu, p.33 - 34, 2003/00
no abstracts in English
Takase, Kazuyuki
Fusion Engineering and Design, 63-64, p.205 - 210, 2002/12
Times Cited Count:2 Percentile:16.96(Nuclear Science & Technology)no abstracts in English
Wakai, Eiichi; Ezawa, Tadashi*; Imamura, Junko*; Takenaka, Tsuyoshi*; Tanabe, Tetsuo*; Oshima, Ryuichiro*
Journal of Nuclear Materials, 307-311(Part.1), p.367 - 373, 2002/12
Times Cited Count:29 Percentile:84.85(Materials Science, Multidisciplinary)no abstracts in English
Yoneda, Yasuhiro; Sakaue, Kiyoshi*; Terauchi, Hikaru*
Japanese Journal of Applied Physics, Part 1, 40(12), p.6888 - 6892, 2001/12
Times Cited Count:2 Percentile:11.78(Physics, Applied)no abstracts in English
Yoneda, Yasuhiro; Sakaue, Kiyoshi*; Terauchi, Hikaru*
Journal of Physics; Condensed Matter, 13(42), p.9575 - 9582, 2001/10
Times Cited Count:19 Percentile:68.05(Physics, Condensed Matter)no abstracts in English
Yamaki, Tetsuya; Shinohara, Ryuji*; Asai, Keisuke*
Thin Solid Films, 393(1-2), p.154 - 160, 2001/08
Times Cited Count:10 Percentile:50.69(Materials Science, Multidisciplinary)no abstracts in English
Kinuya, Seigo*; Yokoyama, Kunihiko*; Kobayashi, Katsutoshi; Motoishi, Shoji; Onoma, Katsuyuki; Watanabe, Naoto*; Shuke, Noriyuki*; Bunko, Hisashi*; Nichigishi, Takatoshi*; Tonami, Norihisa*
Annals of Nuclear Medicine, 15(3), p.199 - 202, 2001/06
Times Cited Count:9 Percentile:31.12(Radiology, Nuclear Medicine & Medical Imaging)no abstracts in English
Matsumoto, Takahiro*; Suzuki, Junichi; Onuma, Masato*; Kanemitsu, Yoshihiko*; Masumoto, Yasuaki*
Physical Review B, 63(19), p.195322_1 - 195322_5, 2001/05
Times Cited Count:57 Percentile:89.86(Materials Science, Multidisciplinary)no abstracts in English
Harada, Masahide; Teshigawara, Makoto; Kai, Tetsuya; Sakata, Hideaki*; Watanabe, Noboru; Ikeda, Yujiro
JAERI-Conf 2001-002, p.793 - 807, 2001/03
no abstracts in English
Imanaka, Masayo*; Nagao, Seiya; Nakaguchi, Yuzuru*; Yamaguchi, Yoshitaka*; Suzuki, Yasuhiro*; Murakami, Masahiro*; Hiraki, Keizo*
Proceedings of International Conference on the Biogeochemistry of Trace Elements (ICOBTE2001), P. 662, 2001/00
no abstracts in English
Maebara, Sunao; Morimoto, Iwao*; Shiho, Makoto
Shingaku Giho, 100(405), p.61 - 64, 2000/11
no abstracts in English
Kaminaga, Masanori; Kinoshita, Hidetaka; Haga, Katsuhiro; Hino, Ryutaro; Nakamura, Fumihito*; Ohashi, Masahisa*
JAERI-Tech 2000-044, 25 Pages, 2000/06
no abstracts in English