Influence of silicon carbide fiber (SiCf) type on the electromagnetic microwave absorbing properties of SiCf/epoxy composites

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• 作者：Hongyu Wang^a ; ^{wanghongyu@sust.edu.cn} ; ^{wanghongyu07010310@163.com} ; Dongmei Zhu^b ; Xiufeng Wang^a ; Fa Luo^b
• 关键词：A. Polymer-matrix composites (PMCs) ; B. Electrical properties ; B. Mechanical properties ; Microwave absorbing properties
• 刊名：Composites Part A: Applied Science and Manufacturing
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：93
• 期：Complete
• 页码：10-17
• 全文大小：1972 K
• 卷排序：93

文摘

A comparative investigation of microstructure, mechanical properties, complex permittivity and microwave absorbing properties of two types of SiCf/epoxy composites were investigated. The microstructure of SiCf was characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and Raman spectra techniques. The different microstructure led to different complex permittivity of the composites. The complex permittivity of KD-ISiCf/epoxy composite was larger than their counterparts of SLF-SiCf/epoxy composite while the flexural strength was almost same. The strong interfacial polarization and high electrical conductivity are attributed to the higher complex permittivity of KD-ISiCf/epoxy composite. Though the complex permittivity of KD-ISiCf and SLF-SiCf composites have big difference, the absorbing properties in the X band (8.2–12.4 GHz) were not good due to the impedance degree and attenuation characteristics cannot meet the requirement at the same time.