When 3:30 PM - 5:00 PM Feb 19, 2010
Where 1670 CSE
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Ultra-high Temperature Ceramic Composite Coatings for Oxidation Protection of C-C Composites

Erica L. Corral, University of Arizona

The development of next generation hypersonic flight vehicles requires new thermal protection system (TPS) materials. Our TPS materials efforts focus on processing superior coatings of ZrB2-SiC composites to provide oxidation protection for C-C composites. Our approach uses precursors and sol-gel chemistry methods to create continuous and adherent ceramic coatings from infiltrated pre-ceramic polymers. Coatings of ZrB2-SiC composites were infiltrated throughout the bulk of the C-C composite and were up to 30 microns thick on the surface. Our protective coatings were evaluated for thermal-shock performance at the National Solar Thermal Testing Facility  (> 2000 °C) and for ablation resistance using an oxyacetylene torch test facility (> 1500 °C). Oxidation test results show that our coatings provide oxidation protection of C-C composites for up to thirty seconds at high temperatures.

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