Title: Evaluation of microstructure for SiC/SiC composites

Authors: S. Suyama, T. Kameda, Y. Itoh

Addresses: Power & Industrial Systems Research & Development Center, Toshiba Corporation, 21 Ukishima-cho, Kawasaki-ku, Kawasaki 210-0862, Japan. ' Power & Industrial Systems Research & Development Center, Toshiba Corporation, 2.4 Suehiro-cho, Turumi-ku, Yokohama 230-0045, Japan. ' Power & Industrial Systems Research & Development Center, Toshiba Corporation, 2.4 Suehiro-cho, Turumi-ku, Yokohama 230-0045, Japan

Abstract: SiC/SiC composites are expected to be used as materials for high temperature structural parts because of their high temperature stability. Toshiba has developed two kinds of SiC/SiC composites for gas turbine hot parts applications, which produced by RS and PIP processes. The both processes have the capabilities of making complex shapes in near net. In this work, the microstructure of two kinds of SiC/SiC composites was evaluated using mercury intrusion method. The influence of their microstructural feature on some properties, such as bending strength, thermal conductivity and oxidation resistance, were discussed.

Keywords: reaction sintering; precursor impregnation and pyrolysis; PIP; porosity; pore size distribution; bending strength; thermal conductivity; oxidation resistance; ceramic matrix composites; CMC; silicon carbide; high temperature; gas turbines; microstructure.

DOI: 10.1504/IJMPT.2001.005433

International Journal of Materials and Product Technology, 2001 Vol.16 No.1/2/3, pp.232 - 238

Published online: 01 Oct 2004 *

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