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Broadband wave-absorbing composite material and preparation method thereof
The invention discloses a broadband wave-absorbing composite material which is formed by sequentially laminating a low-temperature-resistant reflecting layer, a medium-temperature-resistant loss layer and a high-temperature-resistant matching layer, the matching layer is made of a metal or carbon fiber and oxide composite material with a periodic structure, the loss layer is made of a modified silicon carbide ceramic-based composite material, and the reflecting layer is made of a metal composite material with low porosity. The preparation method of the composite material comprises the steps of degumming treatment of a fiber preform, interface preparation, preparation of a modified silicon carbide matrix, preparation of a surface metal layer, preparation of a periodic structure and filling. The composite material prepared by the method disclosed by the invention is high in structural strength, can realize a bearing function while absorbing waves, effectively reduces the weight of parts, is stable in wave absorbing performance, has relatively stable electromagnetic wave absorbing capacity even in a high-temperature bearing environment, is thin in thickness and wide in absorbing frequency band, has tunability in absorption of electromagnetic waves, and can be widely applied to the field of electromagnetic wave absorption. And the method has a relatively high application value.
本发明公开了一种宽频吸波复合材料，由耐低温反射层、耐中温损耗层、耐高温匹配层依次叠层而成，匹配层是具有周期性结构的金属或碳纤维、氧化物复合材料，损耗层为改性碳化硅陶瓷基复合材料，反射层为低气孔率的金属复合材料。该复合材料的制备方法包括：纤维预制体除胶处理、界面制备、改性碳化硅基体制备、表面金属层制备、周期性结构制备及填充。该发明方法制备的复合材料的结构强度高，在吸波的同时可以实现承载功能，有效减少部件的重量，同时吸波性能稳定，即使在高温承载环境下也具有较为稳定的电磁波吸收能力，厚度薄，吸收频带宽，对电磁波的吸收具有可调谐性，具有较高的应用价值。
Broadband wave-absorbing composite material and preparation method thereof
The invention discloses a broadband wave-absorbing composite material which is formed by sequentially laminating a low-temperature-resistant reflecting layer, a medium-temperature-resistant loss layer and a high-temperature-resistant matching layer, the matching layer is made of a metal or carbon fiber and oxide composite material with a periodic structure, the loss layer is made of a modified silicon carbide ceramic-based composite material, and the reflecting layer is made of a metal composite material with low porosity. The preparation method of the composite material comprises the steps of degumming treatment of a fiber preform, interface preparation, preparation of a modified silicon carbide matrix, preparation of a surface metal layer, preparation of a periodic structure and filling. The composite material prepared by the method disclosed by the invention is high in structural strength, can realize a bearing function while absorbing waves, effectively reduces the weight of parts, is stable in wave absorbing performance, has relatively stable electromagnetic wave absorbing capacity even in a high-temperature bearing environment, is thin in thickness and wide in absorbing frequency band, has tunability in absorption of electromagnetic waves, and can be widely applied to the field of electromagnetic wave absorption. And the method has a relatively high application value.
本发明公开了一种宽频吸波复合材料，由耐低温反射层、耐中温损耗层、耐高温匹配层依次叠层而成，匹配层是具有周期性结构的金属或碳纤维、氧化物复合材料，损耗层为改性碳化硅陶瓷基复合材料，反射层为低气孔率的金属复合材料。该复合材料的制备方法包括：纤维预制体除胶处理、界面制备、改性碳化硅基体制备、表面金属层制备、周期性结构制备及填充。该发明方法制备的复合材料的结构强度高，在吸波的同时可以实现承载功能，有效减少部件的重量，同时吸波性能稳定，即使在高温承载环境下也具有较为稳定的电磁波吸收能力，厚度薄，吸收频带宽，对电磁波的吸收具有可调谐性，具有较高的应用价值。
Broadband wave-absorbing composite material and preparation method thereof
一种宽频吸波复合材料及其制备方法
CHEN ZHAOFENG (author) / XIAO QIQIAO (author)
2022-06-14
Patent
Electronic Resource
Chinese
IPC:
B32B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
,
Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse
/
C04B
Kalk
,
LIME
/
H05K
PRINTED CIRCUITS
,
Gedruckte Schaltungen
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