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Improvement of electromagnetic shielding properties for Mg-8Li-6Y-2Zn alloy by heat treatment and hot rolling

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Abstract

The processes of heat treatment and subsequent hot rolling were carried on duplex-phase Mg-8Li-6Y-2Zn alloy to improve the electromagnetic interference (EMI) shielding effectiveness (SE) of the alloy. The microstructure and EMI SE of the alloy under different states were researched. The results show that, after heat treatment, a larger area fraction of second phase, LPSO phase, increases the multiple internal reflections of EM waves. The fine LPSO phases in the subsequent hot rolling can facilitate dynamically recrystallized grains refinement. Meanwhile, the hot rolling improves the electrical conductivity of the alloy. The increase of interfaces and electrical conductivity are both beneficial to improve the EMI SE of the alloy. The combination of heat treatment and hot rolling can provide an efficient strategy for improving the EMI SE of Mg-8Li-6Y-2Zn alloy.

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Acknowledgements

This paper was supported by National Natural Science Foundation of China (51671063, 51771060, 51871068, 51971071), Domain Foundation of Equipment Advance Research of 13th 5-year Plan (61409220118), the Fundamental Research Funds for the Central Universities (3072020CFT1006), Harbin City Application Technology Research and Development Project (2017RAQXJ032)

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Authors and Affiliations

  1. Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, Harbin Engineering University, Harbin, 150001, China

    Jiahao Wang, Siyuan Jin, Ruizhi Wu, Lin Xu, Jinghuai Zhang, Jing Feng & Legan Hou

  2. College of Science, Heihe University, Heihe, 164300, China

    Ruizhi Wu

  3. Tianjin Institute of Aerospace Mechanical and Electrical Equipment, Tianjin, 300301, China

    Yunlei Jiao

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  1. Jiahao Wang
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  2. Siyuan Jin
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Correspondence to Ruizhi Wu.

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Wang, J., Jin, S., Wu, R. et al. Improvement of electromagnetic shielding properties for Mg-8Li-6Y-2Zn alloy by heat treatment and hot rolling. J Mater Sci: Mater Electron 31, 17249–17257 (2020). https://doi.org/10.1007/s10854-020-04279-6

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