Effects of upgrading temperature on electromagnetic shielding properties of three-dimensional graphene/SiBCN/SiC ceramic composites

Chenhao Wang, Yongsheng Liu, Mingxi Zhao, Fang Ye, Laifei Cheng

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

SiC coating is introduced using MTS-H2-Ar system via chemical vapor deposition technology. SER and SET of the composites increased from 7.5 dB to 18.9 dB–9.1 dB and 20.8 dB, respectively, due to the deposition of SiC coating. The influence of oxidation temperature on microstructure and electromagnetic interference shielding performance has been systematically investigated. The morphology of GF/SiBCN/SiC composite remained unchanged after oxidation at 900 °C. However, condensed particles which distributed around cauliflower-like structure disappeared and were replaced by some small particles with increasing temperature. The GF/SiBCN/SiC ceramic composites exhibited mass loss after oxidation at 900 °C initially and saw a slight mass gain afterwards. Graphene layers kept their integral structure and SET retention rate of 97% and 93% have been recorded after oxidation at 900 °C and 1100 °C for 10 h, respectively.

Original languageEnglish
Pages (from-to)21278-21285
Number of pages8
JournalCeramics International
Volume45
Issue number17
DOIs
StatePublished - 1 Dec 2019

Keywords

  • Electromagnetic interference shielding
  • Oxidation temperature
  • SiBCN
  • Silicon carbide (SiC) coating
  • Three-dimensional graphene foam

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