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A Simple Polymeric Precursor Strategy for the Syntheses of Complex Zirconium and Hafnium-Based Ultra High-Temperature Silicon-Carbide Composite Ceramics

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Pyrolyses of chemical precursor systems composed of zirconium or hafnium powders dispersed into blends of the polymethylcarbosilane and poly(norbornenyldecaborane) preceramic polymers provide simple efficient routes to new types of ZrB2/ZrC/SiC and HfB2/HfC/SiC composites. Further extensions of this method should now allow the syntheses of a wide variety of complex potential ultra high-temperature zirconium- and hafnium-based composite materials with controllable tuning of their compositions, microstructures, and/or stabilities.
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Document Type: Research Article

Affiliations: Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323

Publication date: May 1, 2008

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