Dielectric and Electromagnetic Wave Absorbing Properties of Two Types of SiC Fibres with Different Compositions

doi:10.1016/j.jmst.2012.11.006

J. Mater. Sci. Technol. ›› 2013, Vol. 29 ›› Issue (1): 55-58.DOI: 10.1016/j.jmst.2012.11.006

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Dielectric and Electromagnetic Wave Absorbing Properties of Two Types of SiC Fibres with Different Compositions

Fang Ye¹^,²⁾, Litong Zhang^1,²⁾, Xiaowei Yin^1,2), Yongsheng Liu¹^,²⁾, Laifei Cheng^1,2)

1) Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi’an 710072, China
2) State Key Laboratory of Solidi?cation Processing, Northwestern Polytechnical University, Xi’an 710072, China

Received:2012-05-24 Revised:2012-08-15 Online:2013-01-30 Published:2013-02-04
Contact: Xiaowei Yin
Supported by:
National Natural Science Foundation of China (No. 50972119 and 51002120), the 111 Project (No. B08040) and the fund of the State Key Laboratory Of Solidi?cation Processing in Northwestern Poly-technical University (No. KB200920).

Abstract

Abstract:

The dielectric and electromagnetic properties of two types of SiC fibres with different compositions were investigated. The permittivity and electromagnetic shielding effectiveness (SE) of SiC fibre bundles were measured in 8.2–12.4 GHz by waveguide method. The reflection coefficient (RC) of unidirectional SiC fibre laminates was determined in 8–18 GHz using naval research laboratory (NRL)-arc method. Results showed that the electromagnetic wave (EMW) absorbing properties of SiC fibres were correlated with their composition, microstructure and instinct performance of electrical resistance. SiC fibres with higher content and greater size of nano-scale β-SiC showed higher permittivity, conductivity, SE and lower RC, which resulted in their better EMW absorbing ability, i.e. the lower reflection to EMW.

Key words: SiC ?bre, Dielectric, Electrical and magnetic properties

Fang Ye, Litong Zhang, Xiaowei Yin, Yongsheng Liu, Laifei Cheng. Dielectric and Electromagnetic Wave Absorbing Properties of Two Types of SiC Fibres with Different Compositions[J]. J. Mater. Sci. Technol., 2013, 29(1): 55-58.

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Dielectric and Electromagnetic Wave Absorbing Properties of Two Types of SiC Fibres with Different Compositions

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