With ever increasing interest in ceramic matrix composites for high temperature applications, the effect of defects needs to be understood. One of the key defects in this class of materials is porosity that is inherently present due to the manufacturing approaches that are available. While porosity effects are clearly noted for elastic properties based on a rudimentary application of the rule of mixtures approach, the effect on durability is not as clear. This is due to the dominance of fibers on the in-plane mechanical properties. In the following work, a series of samples with different levels of porosity were fabricated. Tensile and durability testing were conducted on the samples. As appropriate, non-destructive screening were performed before testing. The results from these tests are presented and trends noted based on mechanical and micro-structural analysis. Insight into such behavior will be a key in setting future non-destructive rejection levels.
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