TY - JOUR
T1 - Regulating synergistic micro-nano pore structure of CNT sponge to control EMI shielding performance
AU - Huang, Weizhao
AU - Mei, Hui
AU - Yan, Yuekai
AU - Xia, Junchao
AU - Cheng, Laifei
N1 - Publisher Copyright:
© 2024 The Authors
PY - 2024/3/1
Y1 - 2024/3/1
N2 - The aggregation in high-content carbon nanotube reinforced silica carbide composites (CNT/SiC) imposed constraints for further large-scale industrial applications. This study established a synergistic micro-nano pore structure by assembling CNT bundles to fabricate the CNT sponge preform, and then the SiC matrix was in-situ deposited by chemical vapor infiltration method, which facilitates composites with high density and exceptional properties. The pore size distribution and pore area can be regulated by simply adjusting the compression ratios (CRs) of the as-assembled CNT sponge. Samples with CR of 50 % exhibited noteworthy densification, significantly reduced porosity, and a remarkable 163.54 % extra increase in compression strength compared to uncompressed ones. Additionally, the CNT/SiC composites displayed excellent oxidation resistance and demonstrated improved electromagnetic interference (EMI) shielding performance, which exhibited a substantial increase with higher CRs. These findings underscore the significance of employing appropriate multi-level porosity in CNT preforms to fabricate advanced ceramic matrix composites with superior EMI shielding capabilities.
AB - The aggregation in high-content carbon nanotube reinforced silica carbide composites (CNT/SiC) imposed constraints for further large-scale industrial applications. This study established a synergistic micro-nano pore structure by assembling CNT bundles to fabricate the CNT sponge preform, and then the SiC matrix was in-situ deposited by chemical vapor infiltration method, which facilitates composites with high density and exceptional properties. The pore size distribution and pore area can be regulated by simply adjusting the compression ratios (CRs) of the as-assembled CNT sponge. Samples with CR of 50 % exhibited noteworthy densification, significantly reduced porosity, and a remarkable 163.54 % extra increase in compression strength compared to uncompressed ones. Additionally, the CNT/SiC composites displayed excellent oxidation resistance and demonstrated improved electromagnetic interference (EMI) shielding performance, which exhibited a substantial increase with higher CRs. These findings underscore the significance of employing appropriate multi-level porosity in CNT preforms to fabricate advanced ceramic matrix composites with superior EMI shielding capabilities.
KW - Carbon nanotube sponge
KW - Chemical vapor infiltration
KW - Compression ratio
KW - Electromagnetic interference shielding
UR - https://www.scopus.com/pages/publications/85183320947
U2 - 10.1016/j.jmrt.2024.01.205
DO - 10.1016/j.jmrt.2024.01.205
M3 - 文章
AN - SCOPUS:85183320947
SN - 2238-7854
VL - 29
SP - 1155
EP - 1164
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
ER -