Design, preparation and microwave absorbing properties of resin matrix composites reinforced by SiC fibers with different electrical properties

被引：46
作者：
Liu, Haitao [1 ,2 ]
Cheng, Haifeng [1 ]
Tian, Hao [1 ]
机构：
[1] Natl Univ Def Technol, Coll Aerosp Sci & Engn, Sci & Technol Adv Ceram Fibers & Composites Lab, Changsha 410073, Hunan, Peoples R China
[2] Natl Univ Def Technol, Coll Aerosp Sci & Engn, Sci & Technol Scramjet Lab, Changsha 410073, Hunan, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2014年 / 179卷
基金：
中国国家自然科学基金;
关键词：
Microwave absorbing structures (MASs); Sandwich structure; SiC fibers; Resin matrix composites; Electrical properties; Microwave absorbing properties; SILICON-CARBIDE FIBERS; DIELECTRIC-PROPERTIES; CARBON-FIBER; LAYER; BAND; RESISTIVITY; FABRICATION; MICROSTRUCTURE; INTERPHASE; PYROLYSIS;
D O I：
10.1016/j.mseb.2013.09.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
One kind of sandwich structure microwave absorbing structures (SSMASs) derived from Salisbury absorbers is reported. The impedance characteristics of SSMASs are analyzed, and the mechanisms of broadening microwave absorbing bandwidth are interpreted by Smith chart. In order to realize SSMASs, high electrical resistivity SiC fibers with Si-C-O surface layers and low electrical resistivity SiC fibers with pyrocarbon surface layers are employed and analyzed by SEM, XPS, AES and HRTEM. The conductive model of SiC fibers with pyrocarbon layers is built and electrical resistivity simulation is done. The SSMASs are fabricated by employing plain woven SiC fiber fabrics with high and low electrical resistivity as reinforcements of dielectric layers and lossy layer, respectively. The microwave absorbing properties of SSMASs are measured and compared with simulated results. The results show that the experimental and simulated results are in good agreement, the SSMASs have better wideband microwave absorbing properties, and the microwave absorbing bandwidth at reflectivity below -10 dB can reach 11.6 GHz. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：17 / 24
页数：8
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