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R-Curve Response Of Silicon Carbide Whisker-Reinforced Alumina: Microstructural Influence

Published online by Cambridge University Press:  15 February 2011

E. Y. Sun ,
C. H. Hsueh  and
P. F. Becher
E. Y. Sun
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831–6068
C. H. Hsueh
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831–6068
P. F. Becher
Affiliation:
Metals and Ceramics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831–6068
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Abstract

Rising fracture resistance with crack extension (R-curve response) can lead to improvements in the mechanical reliability of ceramics. To understand how microstructures influence the R-curve behavior, direct observations of crack interactions with microstructural features were conducted on SiC whisker-reinforced alumina. The contribution of the dominant toughening mechanisms to the R-curve behavior of these composites is discussed using experimental and theoretical studies.

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