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Interface Properties of Ceramic Composites at High Temperature

Published online by Cambridge University Press:  10 February 2011

X.-F. Zhou,
C. Marston and
S. R. Nutt
X.-F. Zhou
Affiliation:
Center for Composite Materials, University of Southern California, Los Angeles, CA 90089–0241.
C. Marston
Affiliation:
Center for Composite Materials, University of Southern California, Los Angeles, CA 90089–0241.
S. R. Nutt
Affiliation:
Center for Composite Materials, University of Southern California, Los Angeles, CA 90089–0241.
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Abstract

For high-temperature performance of ceramic composites, interfaces are designed to provide toughness through debonding while resisting thermal oxidation in aggressive environments. Thus, the evaluation of interfacial properties at high temperatures is of critical importance. In recent work at USC, interfacial properties were measured at high temperatures by single fiber pushout tests. Six advanced ceramic composites were selected to perform pushout testing at 20–1000°C. Variation in interface designs and effects of thermal history were evaluated with respect to interface failure strength. At higher temperatures, the average interfacial bond strength was often higher. SEM observations were correlated with pushout measurements to evaluate the interfacial behavior.

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References

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