Oxidation behavior and protection of carbon/carbon composites |
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| Affiliation: | 1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China;2. Key Laboratory for Solar Energy Photovoltaic of Liaoning Province, Dalian University of Technology, Dalian 116024, China;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2. China Academy of Launch Vehicle Technology, Beijing 100076, China;3. Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China;1. Electrochemical Reaction & Technology Laboratory (ERTL), School of Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, South Korea;2. Ertl Center for Electrochemistry and Catalysis, GRI, GIST, Gwangju 500-712, South Korea;3. Chemical Energy Storage and Transformation Center, Research Institute for Solar and Sustainable Energies, GIST, Gwangju 500-712, South Korea;1. Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Dalian University of Technology) Ministry of Education, Dalian, 116024, China;2. School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China;3. School of Mechanical and Power Engineering, Dalian Ocean University, Dalian, 116023, China;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, 410083, China;2. Hunan Shixin New Material Co., LTD, Zhuzhou, 412000, China |
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| Abstract: | The oxidation behavior of C/C composite sheet materials in air has been studied over a wide range of temperature. Gasification was detectable at around 500°C and above about 900°C, under the flow conditions used in the experiments, the overall rates of gasification were controlled by gas phase diffusion. The presence of catalysts reduced the temperature for the onset of gasification but had no effect on the kinetics in the diffusion-controlled region. Borate-based coatings containing refractory particulates and silicon carbide coatings sealed with borates have been found capable of protecting C/C composites against air oxidation for extended periods to temperatures of at least 1200°C. |
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