烧蚀型防热/吸波多功能一体化复合材料的制备及性能
Preparation and properties of multi-functional composite integrated with heat-shielding and radar-absorbing
宋若康 1张梦珊 2戴珍 1潘振雪 1洪义强 1朱宇1
作者信息
- 1. 北京机电工程总体设计部,北京 100854
- 2. 北京机械设备研究所,北京 100076
- 折叠
摘要
本文分别以传统酚醛树脂和新型有机硅树脂为树脂基体,针刺缝合石英纤维织物为增强材料,双层电阻性超材料为吸波层,采用高压树脂传递模塑成型工艺(HP-RTM)制备了两种烧蚀防热/吸波多功能一体化复合材料.系统研究了材料的微观组织、力学性能及烧蚀对其吸波性能的影响机制.结果表明:采用传统酚醛树脂和有机硅树脂制备的两种多功能一体化复合材料组织均匀、力学性能优异,材料在 2～18 GHz的平均反射率低于-10 dB,尤其在S、C、X中低频段吸波性能优异,吸收率大于 90%的有效带宽大于 9 GHz,这主要归因于介质层的良好透波性和双层超材料的谐振吸波效应.然而,酚醛树脂基一体化复合材料在石英灯烧蚀后,表面形成了高电导率的连续碳层,成为雷达波强反射体,导致其吸波性能几乎全部丧失,相比之下,由于有机硅树脂基一体化复合材料在烧蚀后残碳量少、不连续,其吸波性能没有明显降低,仅波形向高频偏移了2 dB,该材料在高温烧蚀隐身领域具有较大的应用潜力.
Abstract
In this paper,two kinds of multi-functional composites integrated with heat-shielding and radar-absorb-ing were prepared by high pressure resin transfer molding(HP-RTM),employing traditional phenolic and silicone resin as matrix,needle stitched quartz fiber fabric as reinforcing material,and metamaterials as radar absorbing layers.The effects of microstructure,mechanical properties,and ablation on the microwave absorbing properties of the multi-functional composites were systematically investigated.The results show that the two multi-functional composites prepared have uniform microstructure and excellent mechanical properties.The average reflectivity of the composites in 2-18 GHz are lower than-10 dB,especially in S,C,and X bands,and the effective bandwidth is wider than 9 GHz,which is ascribed to the good transmissivity of the medium layer and the resonant absorption effect of metamaterial layers.However,a continuous carbon layer with high conductivity are formed on the surface of phenolic matrix composite after ablation,which seriously degraded its wave absorbing property.In contrast,the wave absorbing property of silicone matrix composite remains the same due to discontinuity of the carbon layer with band shifting to high frequency,which shows its great application potential in high temperature ablation/stealth field.
关键词
有机硅树脂/雷达吸波/烧蚀/超材料/反射率Key words
silicone resin/radar absorption/ablation/metamaterials/reflection loss引用本文复制引用
出版年
2024
NETL
NSTL
维普
万方数据