In-situ growth of SiC nanowires@carbon nanotubes on 3D printed metamaterial structures to enhance electromagnetic wave absorption

Hui Mei; Wenqiang Yang; Xing Zhao; Li Yao; Yongtao Yao; Chao Chen; Laifei Cheng

Materials & Design (Jan 2021)

In-situ growth of SiC nanowires@carbon nanotubes on 3D printed metamaterial structures to enhance electromagnetic wave absorption

Hui Mei,
Wenqiang Yang,
Xing Zhao,
Li Yao,
Yongtao Yao,
Chao Chen,
Laifei Cheng

Affiliations

Hui Mei: Science and technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China; Corresponding authors.
Wenqiang Yang: Science and technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China
Xing Zhao: Science and technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China
Li Yao: Science and technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China
Yongtao Yao: National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, PR China
Chao Chen: Science and technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China; Corresponding authors.
Laifei Cheng: Science and technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, Shaanxi 710072, PR China

Journal volume & issue: Vol. 197
p. 109271

Abstract

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Impedance matching and attenuation principles are decisive for electromagnetic wave (EMW) absorption materials to achieve wider absorption bandwidth and higher strength absorption. By designing macrostructures to obtain metamaterials and tuning microstructures of absorption materials, impedance matching characteristic and absorption performance can be readily improved. In this paper, three-dimensional (3D) printing technology as well as precursor infiltration and pyrolysis (PIP) method were utilized to fabricate Al2O3/carbon nanotubes/SiC nanowires/SiOC composites with twisted cross metamaterial structures, where carbon nanotubes (CNTs) acted as a nucleating agent to obtain SiC nanowires (SiCnw) and as conductive phase to form conductive net structure, thus improving the dielectric and conductive loss of the composites. The Al2O3/CNT/SiCnw/SiOC composites achieved a minimum reflection coefficient (RCmin) value of −56.84 dB (99.999%) at 12.2 GHz with a thickness of 2.8 mm and the effective absorption bandwidth (EAB) ranges from 8.2–12.4 GHz with a thickness of 3.2 mm, covering the whole X-band. The excellent EMW absorption performance of the composite with metamaterial structure makes it possible to be practically applied.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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