Ultra-High-Temperature Ceramic Coatings for Oxidation Protection of Carbon–Carbon Composites
Carbon–carbon (C–C) composites are attractive materials for hypersonic flight vehicles but they oxidize in air at temperatures >500°C and need thermal protection systems to survive aerothermal heating. We investigated using multilayers of high-temperature ceramics such as ZrB2 and SiC to protect C–C against oxidation. Our approach combines pretreatment and processing steps to create continuous and adherent high-temperature ceramic coatings from infiltrated preceramic polymers. We tested our protective coatings at temperatures above 2600°C at the National Solar Thermal Testing Facility using controlled cold-wall heat flux profiles reaching a maximum of 680 W/cm2.
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Document Type: Research Article
Affiliations: Sandia National Laboratories, Ceramic Processing and Inorganic Materials Department, Albuquerque, New Mexico 87106
Publication date: May 1, 2008