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Tsuji, Nobumasa*; Shibata, Taiju; Sumita, Junya; Ishihara, Masahiro; Iyoku, Tatsuo
FAPIG, (169), p.13 - 17, 2005/03
no abstracts in English
Igawa, Naoki; Taguchi, Tomitsugu; Nozawa, Takashi*; Snead, L. L.*; Hinoki, Tatsuya*; McLaughlin, J. C.*; Kato, Yutai*; Jitsukawa, Shiro; Koyama, Akira*
Journal of Physics and Chemistry of Solids, 66(2-4), p.551 - 554, 2005/02
Times Cited Count：48 Percentile：82.42(Chemistry, Multidisciplinary)Silicon carbide is an important engineering ceramic because of its high strength and stability at high temperature and low induced radioactivity after neutron irradiation. Though monolithic SiC is brittle and low toughness, SiC fiber reinforced SiC matrix composites significantly improve these properties and therefore are attractive candidate materials for fusion reactor structural applications. Recently, stoichiometric SiC fibers with superior mechanical properties have been produced. We carried out the optimization of interface and composite fabrication using the chemical vapor infiltration, which is the one of the best techniques to fabricate the SiC composite. The composite with higher density and homogeneous matrix was obtained by the optimization of materials and carrier gas flow rate. The porosity was decreased with increasing the fiber volume fraction. We adopted the carbon or carbon/SiC interface between fiber and matrix and we found that the dependence of interface thickness on the tensile properties was small in the interface thickness from 50 to 300 nm.
Taguchi, Tomitsugu; Igawa, Naoki; Yamada, Reiji; Jitsukawa, Shiro
Journal of Physics and Chemistry of Solids, 66(2-4), p.576 - 580, 2005/02
Times Cited Count：51 Percentile：84.05(Chemistry, Multidisciplinary)SiC/SiC composites are expected to be one of the candidate materials for fusion reactors because of the low radioactivity after neutron irradiation and excellent mechanical properties at high temperature. Reaction-Bonding (RB) process was employed since this process has a possibility of producing a much denser matrix compared with other processes. SiC fibers, however, adhere strongly to the matrix because of high reactiveness of molten Si with the SiC fiber during RB process. In this study, we investigated the effects of SiC layer as an interphase on fracture behavior in the SiC/SiC. The specimen without an interphase layer showed catastrophic failure behavior while the specimen with SiC interphase layer exhibited non-catastrophic failure behavior by 3-point bending testing. The microstructure observation indicated that SiC fibers did not adhere to the matrix in the specimen with SiC interpahse layer. After 3-point bending testing, the pull-out phenomenon occurred in the SiC/SiC with SiC interphase layer while did not occur in the composite without interphase layer.
Igawa, Naoki; Taguchi, Tomitsugu; Yamada, Reiji; Ishii, Yoshinobu; Jitsukawa, Shiro
Ceramic Engineering and Science Proceedings, Vol.26, No.2, p.27 - 34, 2005/00
no abstracts in English
Ishihara, Masahiro
Seramikkusu, 39(10), p.834 - 837, 2004/10
no abstracts in English
Ishiyama, Shintaro
Nihon Genshiryoku Gakkai Wabun Rombunshi, 3(3), p.288 - 297, 2004/09
Target plate mode of divertor device for fusion reactor was fabricated using low activated and light material, Si/xSiC metal matrix composite and high strength and thermal conductive SiC. This model was exposed under 5MW/m
30sec high heat flux and showed very good cooling performance and no damage was found after this test.
Igawa, Naoki; Taguchi, Tomitsugu; Yamada, Reiji; Ishii, Yoshinobu; Jitsukawa, Shiro
Journal of Nuclear Materials, 329-333(Part1), p.554 - 557, 2004/08
Times Cited Count：6 Percentile：40.63(Materials Science, Multidisciplinary)no abstracts in English
Kurihara, Ryoichi
JAERI-Tech 2004-052, 39 Pages, 2004/07
The problems in the thermal structural design of the plasma facing component such as the blanket first wall and the divertor plate which receives very high heat flux were examined in the design of the fusion power reactors. Compact high fusion power reactor must give high heat flux and high-speed neutron flux from the plasma to the first wall and the divertor plate. In this environmental situation, the micro cracks should be generated in material of the first wall. Structural integrity of the first wall would be very low during the operation of the reactor, if those micro-cracks grow in a crack having significant size by the fatigue or the creep. The crack penetration in the first wall can be a factor which threatens the safety of the fusion power reactor. This paper summarizes the problems on the structural integrity in the first wall made of the SiC/SiC composite material or the ferritic steel.
Ishihara, Masahiro; Hanawa, Satoshi; Sogabe, Toshiaki; Tachibana, Yukio; Iyoku, Tatsuo
Materials Science Research International, 10(1), p.65 - 70, 2004/04
no abstracts in English
The, D. T.; Yoshii, Fumio; Nagasawa, Naotsugu; Kume, Tamikazu
Journal of Applied Polymer Science, 91(4), p.2122 - 2127, 2004/02
Times Cited Count：15 Percentile：45.21(Polymer Science)no abstracts in English
Ishihara, Masahiro
Tanso, (208), p.135 - 144, 2003/09
no abstracts in English
Xu, Y.*; Tanaka, Shigeru
JAERI-Conf 2003-001, p.156 - 161, 2003/03
no abstracts in English
Baba, Shinichi; Ishihara, Masahiro; Suzuki, Yoshio*; Takahashi, Tsuneo*; Hoshiya, Taiji
JAERI-Data/Code 2002-008, 126 Pages, 2002/03
JAERI-Data-Code-2002-008.pdf:4.82MB
no abstracts in English
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：19.6(Nuclear Science & Technology)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：11.94(Physics, Multidisciplinary)no abstracts in English
Kurihara, Ryoichi; Ueda, Shuzo; Nishio, Satoshi; Seki, Yasushi
Fusion Engineering and Design, 54(3-4), p.465 - 471, 2001/04
Times Cited Count：10 Percentile：58.96(Nuclear Science & Technology)no abstracts in English
Baba, Shinichi; Suzuki, Yoshio*; Takahashi, Tsuneo*; Ishihara, Masahiro; Hayashi, Kimio; Saito, Tamotsu; Sozawa, Shizuo; Saito, Takashi; Sekino, Hajime
JAERI-Research 2001-028, 109 Pages, 2001/03
JAERI-Research-2001-028.pdf:4.55MB
no abstracts in English
Taguchi, Tomitsugu; Igawa, Naoki; Yamada, Reiji; Futakawa, Masatoshi; Jitsukawa, Shiro
Ceramic Engineering and Science Proceedings (25th Annual Conference on Composites, Advanced Ceramics, Materials, and Structures: A), 22(3), p.533 - 538, 2001/03
no abstracts in English
/SiC
compositeFutakawa, Masatoshi; Tanabe, Yuji*; Wakui, Takashi*; Kogawa, Hiroyuki; Hino, Ryutaro; Eto, Motokuni
International Journal of Impact Engineering, 25(1), p.29 - 40, 2001/01
Times Cited Count：11 Percentile：48.09(Engineering, Mechanical)no abstracts in English
Sugimoto, Masaki
Kogyo Zairyo, 49(1), p.72 - 76, 2001/01
no abstracts in English
