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Research Progress on Self-Healing and Remanufacturing of Oxidation Resistant Ceramic Coatings |
WANG Hanhui1,2, LIN Changliang1, LI Gongnan1, WANG Kaitong1, WANG Xiong1,2 |
1. Aircraft Design and Research Institute, AVIC Harbin Aircraft Industry Group Co., Ltd., Harbin 150066, China;
2. Tianjin Civil Helicopter R&D Branch, AVIC Harbin Aircraft Industry Group Co., Ltd., Tianjin 300450, China |
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Abstract The thermal structural components of aerospace vehicles using carbon fiber reinforced carbon matrix (C/C) composites as raw materials, are facing harsh service conditions and require oxidation resistant ceramic coatings on their surfaces to resist the erosion in thermo–mechanical–oxygenic coupling environments. However, the brittleness of ceramic coatings make them highly susceptible to damage under external forces, posing a serious threat to the service safety of thermal structural components. Driven by the repair needs of oxidation resistant ceramic coatings and based on the damage size of coatings, the self-healing technology for micro damage and the remanufacturing technology for macro damage are introduced. The implementation methods, research status, repair effects, advantages & disadvantages and application scenarios of the two technologies are elaborated. Finally, the future development directions of the self-healing and remanufacturing of oxidation resistant ceramic coatings are discussed.
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