Porosity Effects on the Elastic Constants of Five Varieties of Silicon Carbide Ceramic

Report No. ARL-TR-2606
Authors: Peter Bartkowski and Stephen Spletzer
Date/Pages: November 2001; 36 pages
Abstract: Silicon carbide is used in armor applications for its ballistic performance and relative low cost. As such, many types of the material have been developed in an attempt to optimize its properties. The scope of this work encompasses a comparison of the static properties and microstructure of five different silicon carbide materials. Material elastic constants are determined through nondestructive test methods. Elemental composition, microstructure, and porosity effects of the materials are also examined. A model was employed to relate the porosity observed in the microstructure to the determined elastic constants. These results are also compared to a model based on the linear law of mixtures.
Distribution: Approved for public release
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Last Update / Reviewed: November 1, 2001