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Pr
Ni
by Changing Mg/Pr ratioSakaki, Koji*; Terashita, Naoyoshi*; Kim, H.*; Majzoub, E. H.*; Proffen, T.*; Machida, Akihiko; Watanuki, Tetsu; Tsunokake, Shigeru*; Nakamura, Yumiko*; Akiba, Etsuo*
Sumato Purosesu Gakkai-Shi, 3(6), p.359 - 366, 2014/11
no abstracts in English
Pr
Ni
(
= 0.6 and 1.0)Sakaki, Koji*; Terashita, Naoyoshi*; Kim, H.*; Majzoub, E. H.*; Machida, Akihiko; Watanuki, Tetsu; Tsunokake, Shigeru*; Nakamura, Yumiko*; Akiba, Etsuo*
Journal of Physical Chemistry C, 118(13), p.6697 - 6705, 2014/04
Times Cited Count：21 Percentile：55.49(Chemistry, Physical)We present an investigation of the degradation mechanism against hydrogenation cycles in MgPrNi ( = 0.6 and 1.0). Mg
PrNi shows significant degradation and loss of capacity after only a few cycles, while Mg
Pr
Ni did not show any reduction of hydrogen storage capacity until 100 cycles. The peak broadening of X-ray diffraction patterns and accumulation of lattice strain were observed concomitantly with an increase of hydrogenation cycles only in MgPrNi. These changes were not observed in MgPrNi. In pair distribution function patterns, 
-dependent peak broadening was observed and it became significant with an increasing number of cycles in MgPrNi, suggesting an increase of the dislocation density. MgPrNi showed higher hardness and more pulverization upon hydrogenation than MgPrNi.
Ti alloys from the atomic pair distribution function analysisKim, H.*; Sakaki, Koji*; Ogawa, Hiroshi*; Nakamura, Yumiko*; Nakamura, Jin*; Akiba, Etsuo*; Machida, Akihiko; Watanuki, Tetsu; Proffen, T.*
Journal of Physical Chemistry C, 117(50), p.26543 - 26550, 2013/12
Times Cited Count：41 Percentile：75.8(Chemistry, Physical)Reduction in reversible hydrogen storage capacity with increasing hydrogenation and dehydrogenation cycle number is observed in numerous hydrogen storage materials, but the mechanism behind this unfavorable change has not been elucidated yet. In this study, we have investigated the development of structural defects or disorders in VTiH
, = 0, 0.2, and 0.5, during the first 15 hydrogen absorption and desorption cycles using the atomic pair distribution function (PDF) analysis of synchrotron X-ray total scattering data to find out the possible structural origin of the poor cyclic stability of VTi alloys.
on dehydrogenation of magnesium borohydride Mg(BH)
Li, H.-W.*; Matsumura, Daiju; Nishihata, Yasuo; Akiba, Etsuo*; Orimo, Shinichi*
Nihon Kinzoku Gakkai-Shi, 77(12), p.627 - 630, 2013/12
Times Cited Count：4 Percentile：27.48(Metallurgy & Metallurgical Engineering)no abstracts in English
Saito, Hiroyuki; Machida, Akihiko; Katayama, Yoshinori; Aoki, Katsutoshi; Akiba, Etsuo*
Nihon Kinzoku Gakkai-Shi, 76(2), p.139 - 143, 2012/02
Times Cited Count：1 Percentile：11.57(Metallurgy & Metallurgical Engineering)Otsuka, Teppei*; Tanabe, Tetsuo*; Tokunaga, Kazutoshi*; Yoshida, Naoaki*; Ezato, Koichiro; Suzuki, Satoshi; Akiba, Masato
Journal of Nuclear Materials, 417(1-3), p.1135 - 1138, 2011/10
Times Cited Count：2 Percentile：18.29(Materials Science, Multidisciplinary)Akiba, Masato; Ishitsuka, Etsuo; Enoeda, Mikio; Nishitani, Takeo; Konishi, Satoshi
Purazuma, Kaku Yugo Gakkai-Shi, 79(9), p.929 - 934, 2003/09
no abstracts in English
Seki, Masahiro; Yamanishi, Toshihiko; Shu, Wataru; Nishi, Masataka; Hatano, Toshihisa; Akiba, Masato; Takeuchi, Hiroshi; Nakamura, Kazuyuki; Sugimoto, Masayoshi; Shiba, Kiyoyuki; et al.
Fusion Science and Technology, 42(1), p.50 - 61, 2002/07
Times Cited Count：5 Percentile：34.58(Nuclear Science & Technology)Latest status on development of long-term fusion nuclear technologies at JAERI is overviewed. A tritium processing system for the ITER and DEMO reactors was designed and basic technologies for each component of this system was demonstrated successfully by an operation of the integrated system for one month. An ultra-violet laser with a wave length of 193 nm was found quite effective for removing tritium from in-vessel components of D-T fusion reactors. Blanket technologies have been developed for the Test Blanket Module of the ITER and for advanced blankets for DEMO reactors. This blanket is composed of LiTiO breeder pebbles and neutron multiplier Be pebbles, contained in a box structures made of a reduced activation ferritic steel F82H. Mechanical properties of F82H under neutron irradiation up to 50 dpa were obtained in a temperature range from 200 to 500
C. Design of the International Fusion Materials Irradiation Facility (IFMIF) has been developed so as to obtain engineering data for candidate materials for DEMO reactors, under neutron irradiation up to 100-200 dpa.
Enoeda, Mikio; Ohara, Yoshihiro; Akiba, Masato; Sato, Satoshi; Hatano, Toshihisa; Kosaku, Yasuo; Kuroda, Toshimasa*; Kikuchi, Shigeto*; Yanagi, Yoshihiko*; Konishi, Satoshi; et al.
JAERI-Tech 2001-078, 120 Pages, 2001/12
This report is a summary of the design works, which was discussed in the design workshop held in 2000 for the demonstration (DEMO) blanket aimed to strengthen the commercial competitiveness and technical feasibility simultaneously. The DEMO blanket must supply the feasibility and experience of the total design of the power plant and the materials. This conceptual design study was performed to determine the updated strategy and goal of the R&D of the DEMO blanket which applies the supercritical water cooling proposed in A-SSTR, taking into account the recent progress of the plasma research and reactor engineering technology.
Ishitsuka, Etsuo; Uchida, Munenori*; Sato, Kazuyoshi; Akiba, Masato; Kawamura, Hiroshi
Fusion Engineering and Design, 56-57, p.421 - 425, 2001/10
Times Cited Count：2 Percentile：19.66(Nuclear Science & Technology)no abstracts in English
Seki, Masahiro; Hishinuma, Akimichi; Kurihara, Kenichi; Akiba, Masato; Abe, Tetsuya; Ishitsuka, Etsuo; Imai, Tsuyoshi; Enoeda, Mikio; Ohira, Shigeru; Okumura, Yoshikazu; et al.
Kaku Yugoro Kogaku Gairon; Mirai Enerugi Eno Chosen, 246 Pages, 2001/09
no abstracts in English
Sato, Kazuyoshi; Ishitsuka, Etsuo; Uchida, Munenori*; Kawamura, Hiroshi; Ezato, Koichiro; Taniguchi, Masaki; Akiba, Masato
Physica Scripta, T91, p.113 - 116, 2001/07
Times Cited Count：1 Percentile：11.96(Physics, Multidisciplinary)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
Uda, Minoru*; Ishitsuka, Etsuo; Sato, Kazuyoshi; Akiba, Masato; *; Kawamura, Hiroshi
Phys. Scr., T81, p.98 - 100, 1999/00
Times Cited Count：2 Percentile：26.15(Physics, Multidisciplinary)no abstracts in English
Uda, Minoru*; Ishitsuka, Etsuo; Sato, Kazuyoshi; Akiba, Masato; *; *; Kawamura, Hiroshi
Fusion Technology 1998, 1, p.161 - 164, 1998/00
no abstracts in English
Fujii, Tsuneyuki; Kimura, Haruyuki; Saigusa, Mikio; Akiba, Masato; Ando, Toshiro; ; Aoyagi, Tetsuo; ; Azumi, Masafumi; Fukuda, Takeshi; et al.
Plasma Physics and Controlled Nuclear Fusion Research 1988, Vol.1, p.605 - 610, 1989/00
no abstracts in English
Saito, Hiroyuki; Machida, Akihiko; Katayama, Yoshinori; Aoki, Katsutoshi; Akiba, Etsuo*
no journal, ,
no abstracts in English
