MICROWAVE ABSORPTION PROPERTIES OF Î²-SiCâC COMPOSITES WITH SOLID PHASE SINTERING AT X BAND
In this paper, by using Î²-SiC powder as a matrix and mixing different content of C, a series of SiCâC composites with solid phase sintering under different temperature were prepared. The relative density, electrical properties and microwave absorption properties at X band were measured systemically. The microwave absorption mechanisms of the composites were studied comprehensively by the test results, together with the microstructure and composition analysis. The main results show that the composites are good microwave absorption ceramics at X band because of the good interface's match of wave impedance by the control of properties and process, C content and sintering process influence effectively all test properties. For the SiCâ3wt%C composites (which is the best microwave absorption one) under 2200Â° sintering, the biggest microwave attenuation is -40.5 dB and almost all attenuations are above -30 dB in the whole X band.
Solid phase sintering, microwave absorption properties, X band, interface's match
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