Magnetic-electric composite coating with oriented segregated structure for enhanced electromagnetic shielding

被引:33
作者
Zhang, Jijun [1 ,2 ,3 ]
Wang, Zexuan [1 ,2 ]
Li, Jiawei [1 ,2 ,4 ]
Dong, Yaqiang [1 ,2 ,4 ]
He, Aina [1 ,2 ,4 ]
Tan, Guoguo [1 ,2 ]
Man, Qikui [1 ,2 ]
Shen, Bin [5 ]
Wang, Junqiang [1 ,2 ]
Xia, Weixing [1 ,2 ]
Shen, Jun [6 ]
Wang, Xin-min [1 ,2 ]
机构
[1] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Ningbo 315201, Peoples R China
[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Peoples R China
[3] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China
[4] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
[5] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo Key Lab Polymer Mat, Ningbo 315201, Peoples R China
[6] Shenzhen Univ, Coll Mechatron & Control Engn, Shenzhen 518060, Peoples R China
来源
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2022年 / 96卷
基金
中国博士后科学基金;
关键词
Fe-based amorphous coatings; Ni-Cu-P; Oriented segregated structure; Electromagnetic shielding; FABRICATION; LIGHTWEIGHT; STRENGTH; PERFORMANCE; SPRAY; FILMS; FOAM;
D O I
10.1016/j.jmst.2021.05.001
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Manipulation of the internal architecture is essential for electromagnetic interference (EMI) shielding performance of metal-based coatings, which can address the electromagnetic pollution in large-size, complex geometries, and harsh environments. In this work, oriented segregated structure with conductive networks embedded in magnetic matrix was achieved in Fe-based amorphous coatings via Ni-Cu-P functionalization of (Fe0.76Si0.09B0.1P0.05)(99)Nb-1 amorphous powder precursors and then thermal spraying them onto aluminum (Al) substrate. Benefiting from the unique magnetic-electric structure, the coating@Al composite delivered prominent EMI shielding performance. The EMI shielding effectiveness (SE) of modified coating@Al composite is similar to 41 dB at 8-12 GHz, doubling the value of Al substrate and is 15 dB greater than that of Ni-Cu-P-free coating@Al composite. Microstructure analysis showed that the introduced Ni-Cu-P insertions forcefully suppress the serious oxidation of the magnetic precursors during thermal spraying and form a dense conductive network in the magnetic matrix. Electron holography observation and electromagnetism simulation clarified that the modified coating can effectively trap and attenuate the incident radiations because of the electric loss from Ni-Cu-P conductive network, magnetic loss from Fe-based amorphous coating, and the electromagnetic interactions in the oriented segregated architectures. Moreover, the optimized thermal isolation and mechanical properties brought by structural improvement enable the coating to shield complex parts in thermal shock and mechanical loading environments. Our work gives an insight on the design strategies for metal-based EMI shielding materials and enriches the fundamental understanding of EMI shielding mechanisms. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
引用
收藏
页码:11 / 20
页数:10
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