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Taguchi, Tomitsugu; Nozawa, Takashi*; Igawa, Naoki; Kato, Yutai*; Jitsukawa, Shiro; Koyama, Akira*; Hinoki, Tatsuya*; Snead, L. L.*
Journal of Nuclear Materials, 329-333(Part1), p.572 - 576, 2004/08
Times Cited Count：46 Percentile：92.85(Materials Science, Multidisciplinary)The SiC/SiC composite with SiC/C multi-layer interphase coated on advanced SiC fibers was fabricated by the forced thermal-gradient chemical vapor infiltration (F-CVI) process for improvement in mechanical properties. The SEM and TEM observation verified that SiC/C multi-layer interphase was formed on SiC fibers. The both flexural and tensile strengths of SiC/SiC composite with SiC/C multi-layer interphase were approximately 10 % higher than that with single carbon interphase. The SEM observation on the fracture surface of the composite with SiC/C multi-layer reveals that cylindrical steps around the fiber were formed. The several crack deflections occurred within SiC/C multi-layer interphase. The SiC/C multi-layer applied in this study operated efficiently to improve the mechanical properties.
Sawa, Kazuhiro; Ueta, Shohei; Iyoku, Tatsuo
Proceedings of International Conference on Global Environment and Advanced Nuclear Power Plants (GENES4/ANP 2003) (CD-ROM), 10 Pages, 2003/09
This paper provides present status of research and development for the coated fuel particle (CFPs) including the advanced ZrC-CFP. Current HTGR employs so-called TRISO-CFPs with SiC layer. In safety design of the HTGR fuels, it is important to retain fission products within CFPs so that their release to primary coolant does not exceed an acceptable level. The behavior of TRISO-CFPs has been investigated through experiments and reactor operation. These data show excellent performance of the TRISO-CFPs when they are correctly fabricated. On the other hand, the crystalline material comprising the SiC layer has a tendency to decompose at high temperature. The transition temperatures of beta-SiC (as-deposited) to alpha-SiC vary from 1600 to 2200
C. ZrC is one of the transition metal carbides which are characterized by the high melting point and the thermodynamic stability etc. The CFPs with CVD-ZrC coatings have been investigated including the fabrication processes and characterization techniques developments.
Oshima, Takayuki; Matsuda, Toshiaki; Iwasaki, Keita*; Ishikawa, Kazuya*
NIFS-MEMO-36, p.463 - 466, 2002/06
no abstracts in English
Hijikata, Yasuto*; Yaguchi, Hiroyuki*; Yoshikawa, Masahito; Yoshida, Sadafumi*
Materials Science Forum, 389-393, p.1033 - 1036, 2002/05
no abstracts in English
Iida, Takeshi*; Tomioka, Yuichi*; Yoshimoto, Kimihiro*; Midorikawa, Masahiko*; Tsukada, Hiroyuki*; Orihara, Misao*; Hijikata, Yasuto*; Yaguchi, Hiroyuki*; Yoshikawa, Masahito; Ito, Hisayoshi; et al.
Japanese Journal of Applied Physics, Part 1, 41(2A), p.800 - 804, 2002/02
Times Cited Count：15 Percentile：52.26(Physics, Applied)no abstracts in English
Futakawa, Masatoshi; Steinbrech, R. W.*; Wakui, Takashi*; *
Hyomen Gijutsu, 50(1), p.58 - 62, 1999/00
no abstracts in English
; Iwamoto, K.; Ikawa, Katsuichi
JAERI-M 9071, 50 Pages, 1980/08
no abstracts in English
; Iwamoto, K.
Mikrochim.Acta, 1976, II, (1-2), p.99 - 110, 1976/02
no abstracts in English
