Abstract
Oxide/oxide ceramic–matrix composites (CMC) are being demonstrated in engine components that are axisymmetric in shape, and subject to axisymmetric thermo-mechanical loadings. Traditionally, woven CMC materials used in these components are made from 0°/90° fiber architectures. In many cases, the highest stresses are not always coincident with the orientation of the reinforcing fibers. Tensile and creeps tests at 1100 °C on a ±45° CMC composed of Nextel TM720 fibers and a alumina–silica matrix (AS-0) have been performed. The ±45° orientation has approximately two-thirds the ultimate tensile strength of the 0°/90° orientation. The creep rupture strength at 100 h for the ±45° orientation is approximately one-third that of the 0°/90° orientation.
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