High‐Temperature Mechanical Behavior of Fiber‐Reinforced Glass‐Ceramic‐Matrix Composites
- 1 September 1985
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 68 (9) , C-248-C-251
- https://doi.org/10.1111/j.1151-2916.1985.tb15803.x
Abstract
Lithium aluminosilicate glass‐ceramic‐matrix composites reinforced with Sic fibers were tested at 900° and 1000°C in flexural and tensile configurations. The composites showed severe thermomechanical degradation when tested in oxidizing atmospheres. This degradation was found to depend on oxygen partial pressure. For Po2≳103 Pa the composites failed in a brittle fashion; a single crack initiated and propagated through the matrix and fibers. At lower Po2, multiple matrix cracking was observed, and the fibers bridged the matrix cracks.Keywords
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