Abstract For high-efficiency microwave absorber, it is wise to integrate the porous structure and SiC material. In this work, the hollow SiC foam with a double interconnected network is proposed via a simple chemical vapor deposition and direct oxidation process. The SiC film imparts the foam with excellent mechanical property and microwave absorption performance. As a result, the fabricated SiC foam possesses a superior compressive response of 1.409 MPa at 17.51% strain, which is much higher than the original C foam or SiC reinforced C foam. Besides, SiC foam shows a minimum reflection loss value of −50.75 dB at 4.85 mm at 6.00 GHz. The effective bandwidth frequency and electromagnetic absorption efficiency also prove the superiority of the hollow porous architecture at the specified thickness, followed by a simple interpretation of the microwave absorbing mechanism. Given the excellent characteristics, the SiC foam has the enormous applied potential as a lightweight absorber in complex microwave absorbing conditions, especially for high temperature applications.

中文翻译：

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具有双重互连网络的中空 SiC 泡沫，具有卓越的微波吸收能力

摘要 对于高效吸波体，将多孔结构与碳化硅材料相结合是明智之举。在这项工作中，通过简单的化学气相沉积和直接氧化过程提出了具有双互连网络的空心 SiC 泡沫。碳化硅薄膜赋予泡沫优异的机械性能和微波吸收性能。因此，制备的 SiC 泡沫在 17.51% 应变下具有 1.409 MPa 的优异压缩响应，远高于原始 C 泡沫或 SiC 增强 C 泡沫。此外，碳化硅泡沫在 6.00 GHz 的 4.85 mm 处显示出 -50.75 dB 的最小反射损耗值。有效带宽频率和电磁吸收效率也证明了中空多孔结构在指定厚度下的优越性，其次是对微波吸收机制的简单解释。鉴于优异的特性，碳化硅泡沫在复杂的微波吸收条件下作为轻质吸收体具有巨大的应用潜力，特别是在高温应用中。