期刊
CERAMICS INTERNATIONAL
卷 42, 期 8, 页码 9448-9454出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.03.001
关键词
Al2O3/SiC; Ti3Si(Al)C-2; Reactive melt infiltration; Electrical conductivity; Electromagnetic interference shielding effectiveness
资金
- Natural Science Foundation of China [51521061]
A dense alumina fiber reinforced silicon carbide matrix composites (Al2O3/SiC) modified with Ti3Si(Al)C-2 were prepared by a joint process of chemical vapor infiltration, slurry infiltration and reactive melt infiltration. The conductive Ti3Si(Al)C-2 phase introduced into the matrix modified the microstructure of Al2O3/SiC. The refined microstructure was composed of conductive phase, semiconductive phase and insulating phase, which led to admirable electromagnetic shielding properties. Electromagnetic interference shielding effectiveness (EMI SE) of Al2O3/SiC and Ti3Si(Al)C-2 modified Al2O3/SiC were investigated over the frequency range of 8.2-12.4 GHz. The EMI SE of Al2O3/SiC-Ti3Si(Al)C-2 exhibited a significant increase from 27.6 to 42.1 dB compared with that of Al2O3/SiC. The reflection and absorption shielding effectiveness increased simultaneously with the increase of the electrical conductivity. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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