Abstract
A single-layer radar-absorbing structure in the X-band (8.2GHz to 12.4GHz) was fabricated by blending conductive carbon black (CB) with the binder matrix of SiCf/AlPO4 composites. An oxidation protective glass coating was prepared on SiCf/AlPO4 composites using a simple and low-cost slurry technique. Oxidation test shows that, after oxidation in air at 1273K for 50h, the three-point bending strength of coated SiCf/AlPO4 composites keeps up to 200MPa, and the complex permittivity has little difference with the as-received sample. By simulating the reflection loss, it was found that −10dB absorbing bandwidth can be more than 3GHz for oxidation test-coated SiCf/AlPO4 composites in the range of 2.8mm to 3.2mm thickness.
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