Papers by Author: Kiyoshi Itatani

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Authors: J. Nozaki, M. Aizawa, Hiroshi Uchida, Hiroshi Suemasu, Kiyoshi Itatani, Akira Nozue, Isao Okada, Morio Matsumoto, Hideo Matsumoto, Yoshiaki Toyama
603
Authors: W. Nishine, Mamoru Aizawa, Masahiro Nawa, Kiyoshi Itatani, Hiroshi Suemasu, Akira Nozue, Isao Okada
213
Authors: Kiyoshi Itatani, Ryuji Tsukamoto, Hiroshi Uchida, Mamoru Aizawa, Anne C.A. Delsing, H.T. Hintzen, Isao Okada
91
Authors: Mamoru Aizawa, Hiroki Shinoda, Hiroshi Uchida, Kiyoshi Itatani, Isao Okada, Morio Matsumoto, Hikaru Morisue, Hideo Matsumoto, Yoshiaki Toyama
647
Authors: Kiyoshi Hirao, Hiroyuki Hayashi, Kiyoshi Itatani, Yukihiko Yamauchi
1021
Authors: Mamoru Aizawa, M. Ito, Kiyoshi Itatani, Hiroshi Suemasu, Akira Nozue, Isao Okada, Minoru Matsumoto, M. Ishikawa, Hiroshi Matsumoto, Yoshiaki Toyama
465
Authors: Kiyoshi Itatani, Ian J. Davies, Hiroshi Suemasu
Abstract: The fabrication conditions of dense silicon carbide (SiC) composites containing chopped Tyranno Si-Al-C (SA) fiber were examined in this work; SiC compacts containing SA fiber (mean lengths: 214, 394 and 706 m) were hot-pressed at 1800°C for 30 min under a pressure of 31 MPa in Ar atmosphere. The fracture toughness of SiC composites with 40 mass% of SA fiber addition (sintering aid: 5 mol% Al4C3) increased from 2.8 up to 4.7 MPa•m1/2 as the fiber length increased from 214 to 706 m. The enhanced fracture toughness of the SiC composites was attributed to the lowering of fiber orientation angle (i.e., the angle between the fiber length and direction perpendicular to the hot-pressing direction) to 5° with increasing fiber length. The fracture toughness of SiC composites could be further enhanced through the incorporation of SA fibers with a carbon interface (thickness: 100 nm) into the SiC matrix. The fracture toughness of SiC composite containing 40 mass% of these fibers attained 6.0 MPa•m1/2. The thermal conductivity of SiC composites increased with fiber length from 30.5 W•m-1•K-1 to 45.5 W•m-1•K-1; with no significant influence being noted for the case of fibers with a carbon interface.
257
Authors: Hiroko Itokazu, Kiyoshi Itatani, Tomohiro Umeda, Ian J. Davies, Yoshiro Musha, Kazuhiro Mizutani, Seiichiro Koda
129
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