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王德文,李聪,孟东容,何庆飞,田赛.碳/碳-碳化硅复合材料在舰载机尾流场中烧蚀性能研究[J].稀有金属材料与工程(英文),2019,48(7):2317~2322.[WANG De-wen,LI Cong,MENG Dong-rong,HE Qing-fei and TIAN Sai.Study on Ablative Properties of C/C-SiC Composites in the Flow Field of Carrier-based Aircraft[J].Rare Metal Materials and Engineering,2019,48(7):2317~2322.]
Study on Ablative Properties of C/C-SiC Composites in the Flow Field of Carrier-based Aircraft
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Received:September 26, 2018  Revised:December 27, 2018
DOI:
Key words: C/C-SiC Composite  Carrier-based Aircraft  Wake Flow Field  Ablation Rate  Thermal Shock
Foundation item:国家科技重大专项(2017ZX04011010);青年科学基金项目(51605480);西京学院(XJ170125)
Author NameAffiliation
WANG De-wen,LI Cong,MENG Dong-rong,HE Qing-fei and TIAN Sai  
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Abstract:
      In order to improve the working performance of the gas deflector of aircraft carrier, the ablation test intended for simulating the takeoff condition is conducted by placing the test specimens of C/C-SiC composite in the wake flow of carrier-based aircraft so as to measure the ablative rate of the test specimens. The ablation mechanism and thermal shock damage of the test specimens are analyzed by adopting a scanning electron microscope (SEM) and micro-CT to observe the micro structure of the test specimens after ablated. By using energy dispersive spectrometry (EDS), the components of combustion products are measured to analyze the ablation mechanism and thermal shock damage of the test specimens. According to the result, the linear ablative rate of the test specimen is about 0.0405mm/s and its mass and its mass ablative rate is about 0.0349g/s. The heat affected zone experiences matrix crack and unapparent oxidation reaction. In the transition zone, the SiO2 produced by the reaction is precipitated around the carbon fibers and forms a sheathing structure, thus effectively retarding oxidation reaction from transferring inward and reducing the ablative rate of the test specimen. In the center of ablation, the retardation of SiC on oxidation reaction is small and the test specimen forms a concave pit, with carbon fibers being distributed in the shape of pointed bamboo shoots. On the whole, the material gives its outstanding anti-ablative performance.