Foam structure to improve microwave absorption properties of silicon carbide/carbon material

Wanchong Li^1,2，Chusen Li¹，Lihai Lin^1,2，Yan Wang³，Jinsong Zhang^1,2

1. Institute of Metal Research,Chinese Academy of Sciences2. School of Materials Science and Engineering,University of Science and Technology of China3. Aviation Key Laboratory of Science and Technology on Electromagnetic Environmental Effects,Shenyang Aircraft Design and Research Institute,AVIC

摘 要：Foam structure materials are well known for their lightweight,efficient,and broadband microwave absorption properties compared to bulk material.However,little has been understood about the effect of a foam structure on the absorption performance of the foam material.In this study,the role of foam structure properties of the silicon carbide/carbon（SiC/C） foam material on microwave absorption is explored using experiment and simulation.We find that the foam structure of SiC/C foam material causes diffraction,multiple reflections,improves the interfacial polarization,and compatibilization.The absorption performance of SiC/C foam material is also studied.The-10 dB effective absorption bandwidth can be adjusted from 4.0 GHz to 18 GHz by tuning SiC/C foam material thickness to 3-7 mm.Therefore,the foam structure design is an effective way to improve the absorption performance of the SiC/C foam material.

关键词：