Paper number 410

PREPARATION AND PROPERTIES OF CERAMIC MATRIX COMPOSITES WITH TYRANNO FIBERSTM AS THE REINFORCEMENT

M.Sato, T.Nakayasu, Y.Inoue, N.Miyamoto and T.Yamamura

Research Institute of Advanced Material Gas-Generator
1-13-4 Kitaootsuka, Toshima-ku, Tokyo 170-0004, Japan

Summary

In order to up-grade high temperature properties of SiCF/SiC composites, SiC-based fibers as the reinforcement, precursor polymers for the SiC-based matrix and the fiber/matrix interfacial structure were investigated. The crystallized Si-Al-C fiber (Tyranno-SA) was very useful reinforcement for the excellent mechanical properties of SiCF/SiC composites at high temperatire. It was founf that the co-polymer of polymethylsilane (PMS) and polycarbosilane (PCS) was able to be converted to a near-stoichiometric SiC matrix. The addition of ZrSiO4 particles into SiC-based matrix was improved the strength of SiCF/SiC composite at high temperature in air, even the SiC-based matrix has included a lot of excess carbon. Tyarnno-ZMI-S6F/C/SiC composite, which had the carbon-rich SiC interphase, exhibited about 400MPa of tensile strength at 1673K in air. Below 1600K in air for short time, SiCF/SiC composites with h-BN interphase were good mechanical properties.

Keywords

fiber-reinforced composite, silicon carbide matrix, silicon carbide fiber, BN interphase, ZrSiO4 interphase, particle-dispersed matrix, ZrSiO4 particle.