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Kita, Kenichiro; Narisawa, Masaki*; Nakahira, Atsushi*; Mabuchi, Hiroshi*; Ito, Masayoshi*; Sugimoto, Masaki; Yoshikawa, Masahito
Advances in Polymer Derived Ceramics and Composites; Ceramic Transactions, Vol.213, p.45 - 50, 2010/06
Kita, Kenichiro; Narisawa, Masaki*; Nakahira, Atsushi*; Mabuchi, Hiroshi*; Sugimoto, Masaki; Yoshikawa, Masahito
Journal of Materials Science, 45(13), p.3397 - 3404, 2010/04
Times Cited Count：11 Percentile：34.92(Materials Science, Multidisciplinary)We synthesized ceramic fibers based on silicon carbide (SiC) from polymer blends of polycarbosilane (PCS) and polymethylphenylsiloxane (PMPhS). PMPhS was compatible with PCS up to 30 mass%. The polymer blend was formed a transparent melt at temperatures higher than 513 K and the softening point was also lowered by adding PMPhS. 15 mass% of PMPhS to PCS was the most suitable condition for obtaining thin fibers with an average diameter of 14.4 
m and the ceramic yield of the cured fiber was 85.5% after pyrolysis at 1273 K. In spite of the small diameter, the resulting tensile strength at 1273 K was rather limited at 0.78 GPa. After high temperature pyrolysis at 1673
1773 K, a porous nanocrystalline SiC fiber with a unique microstructure was obtained with surface area of 70150 m
/g.
Kita, Kenichiro; Narisawa, Masaki*; Nakahira, Atsushi*; Mabuchi, Hiroshi*; Ito, Masayoshi*; Sugimoto, Masaki; Yoshikawa, Masahito
Journal of Materials Science, 45(1), p.139 - 145, 2010/01
Times Cited Count：12 Percentile：37.22(Materials Science, Multidisciplinary)The polymer blends of polycarbosilane (PCS) and polymethylohydrosiloxane with high molecular weight (PMHS-h) were prepared by freeze-drying process. Melt viscosity, themogravimetric analysis, and gas evolution from the polymer blends were analyzed. The polymer blend of HSah15 (15 mass% PMHS-h to PCS) was melt-spun to fiber form, curing by thermal oxidation and pyrolyzed at various temperatures up to 1773 K. The fibers were investigated by tensile tests, FE-SEM observation, and XRD (X-ray diffraction) analysis. After pyrolysis at 1273 K, there were amounts of pores in the cross sections of the fiber derived from HSah15, and after pyrolysis at 1773 K, no remarkable 
-SiC crystal were formed on the outside surface of the fiber derived from HSah15.
Kita, Kenichiro; Narisawa, Masaki*; Mabuchi, Hiroshi*; Ito, Masayoshi*; Sugimoto, Masaki; Yoshikawa, Masahito
Journal of the American Ceramic Society, 92(6), p.1192 - 1197, 2009/06
Times Cited Count：13 Percentile：58.1(Materials Science, Ceramics)Kita, Kenichiro; Narisawa, Masaki*; Mabuchi, Hiroshi*; Ito, Masayoshi*; Sugimoto, Masaki; Yoshikawa, Masahito
Advanced Materials Research, 66, p.5 - 8, 2009/04
Times Cited Count：4 Percentile：81.79(Materials Science, Multidisciplinary)
crystalsAbe, Kenichiro*; Miyoshi, Yoshihiro*; Ashida, Atsushi*; Wakita, Kazuki*; Oshima, Takeshi; Morishita, Norio; Kamiya, Tomihiro; Watase, Seiji*; Izaki, Masanobu*
Japanese Journal of Applied Physics, 44(1B), p.718 - 721, 2005/01
Times Cited Count：1 Percentile：4.7(Physics, Applied)no abstracts in English
crystalsMurakami, Go*; Abe, Kenichiro*; Ashida, Atsushi*; Wakita, Kazuki*; Watase, Seiji*; Izaki, Masanobu*; Oshima, Takeshi; Morishita, Norio; Ito, Hisayoshi
no journal, ,
no abstracts in English
Kita, Kenichiro; Narisawa, Masaki*; Mabuchi, Hiroshi*; Sugimoto, Masaki; Yoshikawa, Masahito
no journal, ,
no abstracts in English
Kita, Kenichiro; Narisawa, Masaki*; Mabuchi, Hiroshi*; Ito, Masayoshi*; Sugimoto, Masaki; Yoshikawa, Masahito
no journal, ,
no abstracts in English
Kita, Kenichiro; Narisawa, Masaki*; Mabuchi, Hiroshi*; Sugimoto, Masaki; Yoshikawa, Masahito
no journal, ,
no abstracts in English
Kita, Kenichiro; Narisawa, Masaki*; Nakahira, Atsushi*; Ito, Masayoshi*; Sugimoto, Masaki; Yoshikawa, Masahito
no journal, ,
no abstracts in English
Narisawa, Masaki*; Kita, Kenichiro*; Sugimoto, Masaki; Yoshikawa, Masahito
no journal, ,
no abstracts in English
