期刊
CERAMICS INTERNATIONAL
卷 48, 期 2, 页码 1908-1915出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.09.275
关键词
Y3Si2C2; SiC fiber; Electromagnetic wave absorption
资金
- National Natural Science Foundation of China [52102122]
- Science Research Project of Hunan Provincial Department of Education [19B146]
A novel ternary layered ceramic of Y3Si2C2 was successfully synthesized on the surface of KD-SA SiC fiber for the first time, significantly improving the EMW absorption performance and achieving effective absorption bandwidth of 5.44 GHz.
A novel ternary layered ceramic of Y3Si2C2 was successfully in-situ synthesized on the surface of home-made third-generation KD-SA SiC fiber for the first time by molten salt method aimed at improving the electromagnetic wave (EMW) absorption. After in-situ synthesis of Y3Si2C2 ceramic layer on SiC fiber (SiCf/Y3Si2C2), significantly improved EMW absorption performance was obtained. The minimum reflection loss (RLmin) of -16.97 dB was reached in SiCf/Y3Si2C2 composites at the thickness of only 2.19 mm, and the effective absorption bandwidth (EAB) was up to 5.44 GHz (12.56-18 GHz) at a thin thickness of 2.64 mm. The improvement in EMW absorption of SiCf/Y3Si2C2 is mainly attributed to enhanced dielectric loss and conduction loss resulting from increased heterogeneous interfaces and multiple reflections and scattering originating from net structure. The SiCf/Y3Si2C2 could be a promising EMW absorber for application in high-performance EMW absorbing materials.
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