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Electromagnetic shielding properties of carbon‐rich chemical vapor infiltration‐prone silicon carbide matrix composites
Author(s) -
Han Daoyang,
Mei Hui,
Xiao Shanshan,
Cheng Laifei
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15365
Subject(s) - chemical vapor infiltration , materials science , silicon carbide , composite material , ceramic matrix composite , electromagnetic shielding , ceramic , composite number , electromagnetic interference , electronic engineering , engineering
This study focuses on the electromagnetic interference shielding effectiveness ( EMI SE ) of SiC nanowire/SiC ceramic composites (SiC nw /SiC) manufactured by chemical vapor infiltration of SiC nw aerogels with carbon‐rich SiC. The total EMI SE of a 1.0 mm thick ceramic composite specimen with density of only 2.68 g/cm 3 , was found to be 43‐44 dB , which indicates an excellent EM shielding capability of the ceramic composite corresponding to blocking of 99.99% of the incident EM signal. It was found that the carbon‐rich CVI ‐SiC matrix possess excellent EM shielding properties, therefore, the CVI ‐SiC CMC s themselves possess an excellent EM shielding property as a result of the carbon‐rich SiC matrix.