摘要
研制开发出了一种适用于蜂窝增强低密度防热材料的抗氧化涂层,研究了抗氧化涂层的工艺性、表面结构、热稳定性,并采用马弗炉烧蚀实验、等离子烧蚀试验以及辐射加热试验对其烧蚀性能进行了考核。结果表明:抗氧化涂层的溶剂含量范围应为25%~75%,适用期大于165 min,涂层厚度≤300μm。酚醛树脂STN-1的涂层热稳定性优于甲基苯基硅橡胶218-1。涂层经历800℃/10 min后出现了比较明显的陶瓷化现象。在1 MW/30 s和1.5 MW/30 s这两个条件下均形成了坚硬、致密的碳层。在2 000℃/300 s的辐射加热环境下,有涂层的蜂窝增强低密度防热材料背面温度降低了10℃,且碳层强度更高。
A kind of anti-oxidation coating suitable for honeycomb-enhanced low-density thermal protection material was studied.The processing property,microstructure of surface,heat resistance of the anti-oxidation coating were investigated,and the ablative property was assessed by muffle furnace ablation test,plasma ablation test and radiation heating test.The results indicates that the solvent content of anti-oxidation coating should be in range from 25%to 75%,its pot-life is greater than 165 min and its thickness is less than 300μm.The thermal stability of the phenolic resin STN-1 coating is better than that of the methylphenyl silicon rubber 218-1.After being exposed to 800℃/10 min,a relatively obvious ceramicization phenomenon occurs in the coating.Under the conditions of 1 MW/30 s and 1.5 MW/30 s,a hard and dense carbon layer is formed.Under the radiation heating environment of 2000℃for 300 s,the back surface temperature of the honeycomb-reinforced low-density heat resistance material with coating is reduced by 10℃,and the strength of the carbon layer is higher.
作者
邓火英
方洲
潘艳
左小彪
代晓伟
DENG Huoying;FANG Zhou;PAN Yan;ZUO Xiaobiao;DAI Xiaowei(Aerospace Research Institute of Materials&Processing Technology,Beijing 100076)
出处
《宇航材料工艺》
北大核心
2025年第1期76-80,共5页
Aerospace Materials & Technology
关键词
蜂窝增强
防热材料
抗氧化涂层
烧蚀
Honeycomb-enhanced
Thermal protective material
Anti-oxidation coating
Ablation
