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无机材料学报

无机材料学报 ›› 2022, Vol. 37 ›› Issue (5): 579-584.DOI: 10.15541/jim20210224

所属专题： 【结构材料】陶瓷基复合材料

• 研究快报 • 上一篇    

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

阮景1,2,3(), 杨金山1,2(), 闫静怡1,2,4, 游潇1,2,4, 王萌萌1,2,4, 胡建宝1,2, 张翔宇1,2, 丁玉生1,2, 董绍明1,2,5()   

  1. 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

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

RUAN Jing1,2,3(), YANG Jinshan1,2(), YAN Jingyi1,2,4, YOU Xiao1,2,4, WANG Mengmeng1,2,4, HU Jianbao1,2, ZHANG Xiangyu1,2, DING Yusheng1,2, DONG Shaoming1,2,5()   

  1. 1. State Key Laboratory of High Performance Ceramics and Super?ne Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;
    2. Structural Ceramics and Composites Engineering Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
    3. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
    4. University of Chinese Academy of Sciences, Beijing 100039, China
    5. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2021-04-01 Revised:2021-07-04 Published:2022-05-20 Online:2021-08-20
  • Contact: YANG Jinshan, professor. E-mail: jyang@mail.sic.ac.cn;DONG Shaoming, professor. E-mail: smdong@mail.sic.ac.cn
  • About author:RUAN Jing (1993–), male, PhD candidate. E-mail: ruanjing@shanghaitech.edu.cn
  • Supported by:
    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)

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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8~12 GHz (X)波段从9.2 dB增加到64.1 dB。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 dB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。

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

Abstract:

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 SiCNWs 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 SiCNWs/SiC ceramic matrix composites were obtained through CVI and precursor impregnation pyrolysis (PIP) process. Methane (CH4) 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 dB to 64.1 dB 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 dB in X-band. The achieved EMI shielding properties suggested that the potential application of the SiCNWs/SiC ceramic matrix composites may be a promising new-generation EMI shielding material.

Key words: SiC nanowire, electromagnetic interference shielding, ceramic matrix composite, PyC deposition, SiC matrix

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