In-field reparation of the damaged coatings for C/C composites |
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| Affiliation: | 1. Hunan Key Laboratory of Micro–Nano Energy Materials and Devices, Xiangtan University, Hunan 411105, PR China;2. Laboratory for Quantum Engineering Micro–Nano Energy Technology, School of Physics and Optoelectronics, Xiangtan University, Hunan 411105, PR China;1. School of Materials Science and Engineering, Anhui University of Technology, Maanshan 243002, PR China;2. Department of Electrical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;1. Escola Técnica de Saúde, Universidade Federal da Paraíba, Cidade Universitária, João Pessoa CEP 58051-900, PB, Brazil;2. Departamento de Engenharia de Materiais, Universidade Federal de Campina Grande, Av. Aprígio Veloso 882, Catolé, Campina Grande CEP 58 429-900, PB, Brazil;3. Departamento de Engenharia de Materiais, Universidade Federal da Paraíba, Cidade Universitária, João Pessoa CEP 58051-900, PB, Brazil;1. Department of Materials Science and Engineering, National Cheng Kung University, Tainan City 70101, Taiwan;2. Research Center for Energy Technology and Strategy, National Cheng Kung University, Tainan City 70101, Taiwan;3. Center for Micro/Nano Science and Technology, National Cheng Kung University, Tainan City 70101, Taiwan;1. College of Logistics Engineering, Shanghai Maritime University, Shanghai 201306, China;2. Institute of Marine Materials Science and Engineering, College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China |
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| Abstract: | Protective coatings are critical to the successful application of the carbon/carbon (C/C) composites in the thermal protection systems of space vehicles. The damages of such coatings during installation and operation would threaten the safety of flight. In this contribution, an in-field technology based on a multilayer structure was developed to repair the damaged coatings of C/C composites. The multilayer structure contains a silicon buffer inner layer, a mullite heat-resistant middle layer and a borosilicate glass outer layer. The oxidation tests in air at 1300 °C and 1500 °C indicated that the weight loss of the repaired samples was greatly reduced compared with that of the damaged ones. The plasma wind tunnel tests for both repaired and damaged coatings further demonstrated that the multilayer structure could effectively protect the damaged composites from ablation in oxidation environments. |
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| Keywords: | Coating repair Multi-layer coating Oxidation test |
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