抄録
The present work investigated the monotonic tension and the tensile creep behaviors of an orthogonal 3-D woven Si-Zr-C-O (Tyranno^<TM> ZMI) fiber/ Si-Ti-C-O matrix composite (CMC) in air at 1573-1723K. The tensile stress-strain curve showed transition from a linear to a nonlinear behavior at a stress of 60MPa at elevated temperatures. As results of the creep test. no apparent steady state creep was recognized. The transient creep behavior of the CMC was interpreted by a simple experimental law. Although a lot of transverse cracks in 90° fiber bundles were observed in all of the specimens. transverse cracks density did not affect considerably the transient creep rate.
