Ultrathin, flexible, and high-strength Ni/Cu/metallic glass/Cu/Ni composite with alternate magneto-electric structures for electromagnetic shielding  

作　　者：Zenan Ma Jiawei Li Jijun Zhang Aina He Yaqiang Dong Guoguo Tan Mingqiang Ning Qikui Man Xincai Liu 

机构地区：[1]Faculty of Materials Science and Chemical Engineering,Ningbo University,Ningbo,315211,China [2]CAS Key Laboratory of Magnetic Materials and Devices,and Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo,315201,China [3]Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu,610054,China

出　　处：《Journal of Materials Science & Technology》2021年第22期43-50,共8页材料科学技术（英文版）

基　　金：This work was financially supported by National Key Research and Development Program of China(No.2016YFB0300500);the National Natural Science Foundation of China(No.51771215);the Ningbo Major Special Projects of the Plan“Science and Technology Innovation 2025”(No.2018B10084);K.C.Wong Magna Fund in Ningbo University。

摘　　要：Electromagnetic interference(EMI)shielding materials with ultrathin,flexible,superior mechanical and thermal management properties are highly desirable for smart and wearable electronics.Here,ultrathin and flexible Ni/Cu/metallic glass/Cu/Ni(Ni/Cu/MG)multilayer composite with alternate magnetic and electrical structures was designed via facial electroless plating of Cu and Ni on an Fe-based metallic glass.The resultant 0.02 mm-thick Ni/Cu/MG composite displays a superior EMI shielding effectiveness(EMI SE)of 35 dB and a great EMI SE/t of 1750 dB/mm,which is greater than those of composites with monotonous multilayer or homogeneous structures.The improved EMI SE originates from the massive ohmic losses,the enhanced internal reflection/absorption,and the abundant interfacial polarization loss.Particularly,Ni/Cu/MG exhibits a high tensile strength of up to 1.2 GPa and outstanding mechanical stability,enabling the EMI SE remains unchanged after 10,000 times of bending.Moreover,Ni/Cu/MG has excellent Joule heating characteristics and thermal stability,which is very suitable for heating components of wearable hyperthermia devices.

关 键 词：Electromagnetic shielding Thermal management Mechanical properties Fe-based metallic glasses Alternate magnetic and electrical structures 

分 类 号：TB331[一般工业技术—材料科学与工程]