Effects of upgrading temperature on electromagnetic shielding properties of three-dimensional graphene/SiBCN/SiC ceramic composites. Issue 17 (1st December 2019)

• Record Type: Journal Article
• Authors: Wang, Chenhao; Liu, Yongsheng; Zhao, Mingxi; Ye, Fang; Cheng, Laifei
• Is Part Of: Ceramics international. Volume 45:Issue 17(2019)Part A
• Page Start: 21278
• Page End: 21285
• Publication Date: 2019-12-01
• Subjects: Three-dimensional graphene foam -- Silicon carbide (SiC) coating -- Oxidation temperature -- Electromagnetic interference shielding -- SiBCN; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2019.07.110
• Languages: English
• ISSNs: 0272-8842

Abstract

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.