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Journal Articles

SiC-based ceramic fibers prepared via organic-to-inorganic conversion process; A Review

Okamura, Kiyohito*; Shimoo, Toshio*; Suzuya, Kentaro; Suzuki, Kenji*

Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 114(1330), p.445 - 454, 2006/06

 Times Cited Count:45 Percentile:75.76(Materials Science, Ceramics)

Several types of Si-based ceramic fibers have been prepared using an organic-to-inorganic conversion process. In this article, the preparation, microstructure, and high-temperature stability of SiC-based ceramic fibers prepared from polycarbosilane of an organosilicon polymer are reviewed. The first fiber produced was an amorphous Si-C-O fiber, next was a low-oxygen content Si-C fiber, and finally, a nearly stoichiometric SiC fiber was developed. These fibers are continuous fine fibers that have high tensile strength with high heat resistance. The pyrolytic behavior and active-passive oxidation of these fibers at high temperatures are described here. The heat resistance of these fibers increases in the order of the Si-C-O fiber, the Si-C fiber, and the SiC fiber. The high-temperature properties are dependent on the atomic arrangement and the quantity of amorphous SiC$$_{x}$$O$$_{y}$$ and glassy carbon in the fibers.

Journal Articles

Influence of TiO$$_{2}$$ and Na$$_{2}$$O additives on properties synthetic rock of fly ash from municipal waste incinerator

Mitamura, Hisayoshi; Bamba, Tsunetaka; Maeda, Toshikatsu

Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 110(1277), p.55 - 59, 2002/01

 Times Cited Count:1 Percentile:19.97(Materials Science, Ceramics)

Influence of additives and hot-pressing temperature on properties of the synthetic rock was investigated, which was developed for making harmless and stabilizing fly ash from municipal waste incinerator. Sintering test at 1200$$^{circ}$$C for 16 h revealed that addition of 20 and 1.5 wt% of TiO$$_{2}$$ and Na$$_{2}$$O, respectively, is necessary for preparation of dense products. X-ray diffractometry showed that these additives promoted the formation of perovskite (CaTiO$$_{3}$$) and gehlenite (Ca$$_{2}$$Al$$_{2}$$SiO$$_{7}$$) minerals. During hot pressing, bulk density of the synthetic rock increased steeply with temperature between 1000 and 1100$$^{circ}$$C. On the other hand, its open porosity decreased rapidly with temperature between 1050 and 1150$$^{circ}$$C. These facts imply that the temperature of 1100$~{}1$150$$^{circ}$$C is practical in hot pressing of fly ash.

Journal Articles

Development of B$$_{4}$$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:19.15(Materials Science, Ceramics)

no abstracts in English

Journal Articles

A Study on carbonation reaction of synthetic 11${AA}$ tobermorite in aqueous solution

Ikeda, Yasuhisa*; Yasuike, Yoshiyuki*; Takahashi, Koichi*; Yamamoto, Mitsuo*; Takahashi, Yoichi*

Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 101(1170), p.145 - 148, 1993/02

None

Journal Articles

Stability of metastable tetragonal zirconia

*; Ono, Hideo

Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 99(1156), p.1234 - 1239, 1991/12

no abstracts in English

Journal Articles

Mechanical properties of chromic oxide coating film on zirconium alloy formed by chemical densified coating method

*; Kawamura, Hiroshi; *;

Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 98(1139), p.721 - 725, 1990/07

no abstracts in English

Journal Articles

Evaluation of defect rate in ceramics coating film

Kawamura, Hiroshi; *; *; *;

Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 97(1131), p.1398 - 1402, 1989/11

no abstracts in English

Journal Articles

On iron enrichment on nuclear waste glass during leaching

; D.E.Clark*

Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 97(1124), p.494 - 497, 1989/04

no abstracts in English

Journal Articles

Effects of notch sharpness and size of specimen on the fracture toughness of nuclear graphites

Oku, Tatsuo; Ishiyama, Shintaro; Eto, Motokuni; *; *; *

Nihon Seramikkusu Kyokai Gakujutsu Rombunshi, 96(1115), p.773 - 777, 1988/07

no abstracts in English

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