Oxidation of SiCf/SiC‐HfB2 Composites under Laser Heating |
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| Authors: | Carmen Carney Clifford Leslie Eric Jones |
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| Affiliation: | 1. Air Force Research Laboratory, Materials and Manufacturing Directorate (AFRL/RXCC), Wright‐Patterson Air Force Base, Dayton, Ohio;2. National Research Council Research Associateship Program, Washington, District of Columbia |
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| Abstract: | Ceramic matrix composites with SylramicTM and CG NicalonTM SiC fibers and SiC‐HfB2 matrices derived from a combination of polymer‐derived SiC ceramic and HfB2 particulate slurries were prepared. The composites were tested for oxidation resistance by laser heating at 2 MW/m2 to achieve temperatures near 1600°C. The oxidation resistance was compared between uncoated CG NicalonTM and BN‐coated SylramicTM fiber‐based composites. Oxidation resulted in precipitated nano‐sized HfO2 independent of the fibers and fiber coatings. |
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