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Journal of Inorganic Materials

Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (5): 579-584.DOI: 10.15541/jim20210224

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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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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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