Enhanced microwave absorbance of oxidized SiCf /AlPO4 composites via the formation of a carbon layer on the SiC fibre surface
Enhanced microwave absorbance of oxidized SiCf /AlPO4 composites via the formation of a carbon layer on the SiC fibre surface
复制标题
通过在 SiC 纤维表面形成碳层增强氧化 SiCf/AlPO4 复合材料的微波吸收
DOI：
10.1016/j.jeurceramsoc.2018.05.038
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发表时间：
2018-10-01
影响因子：
5.7
通讯作者：
Xu, Hongmei
中科院分区：
文献类型：
--
作者：
Wan, Feng;Yan, Jianhui;Xu, Hongmei
A single-layer radar-absorbing structure active in the X-band (8.2 GHz to 12.4 GHz) was demonstrated by blending SiC fibres with an AlPO4 matrix material. The as-prepared SiCf/AlPO4 composites were oxidized at 1273 K for several hours to investigate the effects of oxidation on the dielectric and wave-absorbing properties. Scanning and transmission electron microscopy were used to characterize the morphology and microstructure of the composites. The AlPO4 -SiO2 solid solution during oxidation promoted the formation of a complete carbon layer on the SiC fibre surface. The real and imaginary parts of the SiCf/AlPO4 composites increased from 4.2-4.4 to 5.9-7.1 and from 0.08-0.2 to 3.9-5.2, respectively, with increasing oxidation time from 0 to 10 h, respectively. When the thickness of the composites increased from 2.9 mm to 3.3 mm, the wave-absorbing property noticeably improved due to the formation of a carbon layer on the SiC fibre surface after oxidation.
