三维碳化硅纳米线增强碳化硅陶瓷基复合材料的电磁屏蔽性能  

Electromagnetic Interference Shielding Properties of SiC Ceramic Matrix Composite Reinforced by Three-dimensional Silicon Carbide Nanowire Network

作　　者：阮景 杨金山[1,2] 闫静怡 游潇 王萌萌 胡建宝[1,2] 张翔宇[1,2] 丁玉生[1,2] 董绍明[1,2,5] RUAN Jing;YANG Jinshan;YAN Jingyi;YOU Xiao;WANG Mengmeng;HU Jianbao;ZHANG Xiangyu;DING Yusheng;DONG Shaoming(State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,China;Structural Ceramics and Composites Engineering Research Center,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 201899,China;School of Physical Science and Technology,ShanghaiTech University,Shanghai 201210,China;University of Chinese Academy of Sciences,Beijing 100039,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室,上海200050 [2]中国科学院上海硅酸盐研究所,结构陶瓷及复合材料工程研究中心,上海201899 [3]上海科技大学物质科学与技术学院,上海201210 [4]中国科学院大学,北京100039 [5]中国科学院大学材料科学与光电工程中心,北京100049

出　　处：《无机材料学报》2022年第5期579-584,共6页Journal of Inorganic Materials

基　　金：National Natural Science Foundation of China(51772310);Chinese Academy of Sciences Key Research Program of Frontier Sciences(QYZDY-SSWJSC031);Innovation Academy for Light-duty Gas Turbine,Chinese Academy of Sciences(CXYJJ20-MS-02)。

摘　　要：碳化硅纳米线具有优异的电磁吸收性能,三维网络结构可以更好地使电磁波在空间内被多次反射和吸收。通过抽滤的方法制备得到体积分数20%交错排列的碳化硅纳米线网络预制体。然后采用化学气相渗透工艺制备热解炭界面和碳化硅基体,并通过化学气相渗透和前驱体浸渍热解工艺得到致密的SiCNWs/SiC陶瓷基复合材料。甲烷和三氯甲基硅烷分别是热解炭和碳化硅的前驱体,随着热解碳质量分数从21.3%增加到29.5%,多孔SiCNWs预制体电磁屏蔽效率均值在8~12GHz(X)波段从9.2d B增加到64.1d B。质量增重13%的热解碳界面修饰的SiCNWs/SiC陶瓷基复合材料在X波段平均电磁屏蔽效率达到37.8 d B电磁屏蔽性能。结果显示,SiCNWs/SiC陶瓷基复合材料在新一代军事电磁屏蔽材料中具有潜在应用前景。Silicon carbide nanowires(SiCNWs)possess excellent electromagnetic absorption performance and a three-dimensional(3D)network structure is beneficial to the multiple reflection and absorption of electromagnetic waves(EMWs).The 3D staggered Si CNWs network preforms with a volume fraction of 20%was realized by vacuum filtration method.And then the PyC interphase and SiC matrix were prepared through chemical vapor infiltration(CVI)process,and the densified Si CNWs/SiC ceramic matrix composites were obtained through CVI and precursor impregnation pyrolysis(PIP)process.Methane(CH_(4))and trichloromethylsilane(MTS)were selected as gaseous precursor of the PyC and SiC,respectively.With increase of deposited PyC from 0 to 29.5%,the electromagnetic interference(EMI)shielding efficiency(SE)of the porous SiCNWs increases from 9.2 d B to 64.1 d B in 8–12 GHz(X-band).The densified SiCNWs/SiC ceramic matrix composites with a mass gain of about 13%of PyC interphase present an average EMI SE of 37.8 d B in X-band.The achieved EMI shielding properties suggested that the potential application of the Si CNWs/Si C ceramic matrix composites may be a promising new-generation EMI shielding material.

关 键 词：碳化硅纳米线 电磁屏蔽 陶瓷基复合材料 热解碳 SiC基体 

分 类 号：TQ174[化学工程—陶瓷工业]