期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 29, 期 1, 页码 55-58出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2012.11.006
关键词
SiC fibre; Dielectric; Electrical and magnetic properties
资金
- National Natural Science Foundation of China [50972119, 51002120]
- 111 Project [B08040]
- State Key Laboratory Of Solidification Processing in Northwestern Polytechnical University [KB200920]
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 beta-SiC showed higher permittivity, conductivity, SE and lower RC, which resulted in their better EMW absorbing ability, i.e. the lower reflection to EMW.
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