In-situ growth of MAX phase coatings on carbonised wood and their terahertz shielding properties
Jiaxuan Huang, Hujie Wan, Mian Li, Yiming Zhang, Jianfeng Zhu, Xuelin Li, Wenchao Shui, Yingliang Liu, Xiaomeng Fan, Qiye Wen, Xu Xiao, Qing Huang
Abstract
Abstract Electromagnetic interference (EMI) shielding materials have received considerable attention in recent years. The EMI shielding effectiveness (SE) of materials depends on not only their composition but also their microstructures. Among various microstructure prototypes, porous structures provide the advantages of low density and high terahertz wave absorption. In this study, by using carbonised wood (CW) as a template, 1-mm-thick MAX@CW composites (Ti 2 AlC@CW, V 2 AlC@CW, and Cr 2 AlC@CW) with a porous structure were fabricated through the molten salt method. The MAX@CW composites led to the formation of a conductive network and multilayer interface, which resulted in improved EMI SE. The average EMI SE values of the three MAX@CW composites were > 45 dB in the frequency of 0.6–1.6 THz. Among the composites, V 2 AlC@CW exhibited the highest average EMI SE of 55 dB.