Effect of Alloying Element on Electromagnetic Interference Shielding Effectiveness of Binary Magnesium Alloys

doi:10.1007/s40195-019-00887-2

Acta Metallurgica Sinica (English Letters) ›› 2019, Vol. 32 ›› Issue (7): 817-824.DOI: 10.1007/s40195-019-00887-2

所属专题： 2019年镁合金专辑

收稿日期:2018-11-24 修回日期:2019-01-18 接受日期:2019-05-18 出版日期:2019-03-18 发布日期:2019-06-20

Effect of Alloying Element on Electromagnetic Interference Shielding Effectiveness of Binary Magnesium Alloys

Zhu Luo¹, Xian-Hua Chen^1,²(), Kai Song¹, Chun-Quan Liu¹, Yan Dai¹, Di Zhao¹, Fu-Sheng Pan^1,²

1. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China
2 . Chongqing Academy of Science and Technology, Chongqing 401123, China

Received:2018-11-24 Revised:2019-01-18 Accepted:2019-05-18 Online:2019-03-18 Published:2019-06-20

摘要/Abstract

关键词: Binary magnesium alloys, Electrical conductivity, Electromagnetic shielding effectiveness, Alloying element

Abstract:

The microstructure, electrical conductivity and electromagnetic interference shielding effectiveness of Mg-X (X?=?Al, Sn, Y and Gd) alloys in as-cast and solution states were systematically investigated in this study. The electrical conductivity and electromagnetic shielding capacity of binary magnesium alloys decrease linearly with alloying element content. The electromagnetic shielding effectiveness of the binary magnesium alloys with the same alloying element content is as follows: Mg-Gd?

Key words: Binary magnesium alloys, Electrical conductivity, Electromagnetic shielding effectiveness, Alloying element

. [J]. Acta Metallurgica Sinica (English Letters), 2019, 32(7): 817-824.

Zhu Luo, Xian-Hua Chen, Kai Song, Chun-Quan Liu, Yan Dai, Di Zhao, Fu-Sheng Pan. Effect of Alloying Element on Electromagnetic Interference Shielding Effectiveness of Binary Magnesium Alloys[J]. Acta Metallurgica Sinica (English Letters), 2019, 32(7): 817-824.

图/表 12

Table 1 Chemical compositions of the four binary Mg alloys

Mg-X (wt%)	Al	Sn	Y	Gd
1	1.22	1.11	0.98	1.03
3	3.02	3.00	3.02	3.03
5	4.79	5.02	4.93	5.02

Fig. 1 OM images of as-cast Mg alloys: a Mg-5Al alloy, b Mg-5Sn alloy, c Mg-5Y alloy, d Mg-5Gd alloy

Fig. 2 OM images of T4 Mg alloys: a Mg-5Al alloy, b Mg-5Sn alloy, c Mg-5Y alloy, d Mg-5Gd alloy

Fig. 3 XRD patterns of as-cast and T4 Mg alloy: a Mg-5Al alloy, b Mg-5Sn alloy, c Mg-5Y alloy, d Mg-5Gd alloy

Fig. 4 a Conductivity of as-cast and T4 Mg-Al alloys; b, c shielding effectiveness of as-cast and T4 Mg-Al alloys, respectively

Fig. 5 a Conductivity of as-cast and T4 Mg-Sn alloys; b, c shielding effectiveness of as-cast and T4 Mg-Sn alloys, respectively

Fig. 6 a Conductivity of as-cast and T4 Mg-Y alloys; b, c shielding effectiveness of as-cast and T4 Mg-Y alloys, respectively

Fig. 7 a Conductivity of as-cast and T4 Mg-Gd alloys; b, c shielding effectiveness of as-cast and T4 Mg-Gd alloys, respectively

Fig. 8 EMI shielding properties of T4 Mg-5Al alloy from theoretical calculations

Fig. 9 a Electrical conductivities, b electromagnetic shielding properties of four solid solution Mg-1 at.% X alloys

Table 2 Electromagnetic shielding effectiveness of magnesium alloys and aluminum alloy reported in the literature and this work

Alloys	Shielding effectiveness (dB)			References
Alloys	900 MHz	1200 MHz	1500 MHz	References
ZK60	55	52	50	[4]
2024 Al alloy	35	35	35	[9]
Mg--1Al	80	80	80	This work
Mg-1Sn	74	70	63	This work
Mg-1Y	74	71	66	This work
Mg-1Gd	70	60	59	This work

Table 3 ΔV/VMg, valence and configuration of extranuclear electron of the four alloying elements [34]

The four alloying elements	Al	Sn	Y	Gd
ΔV/V_M_g (%)	-?28.420	+?16.678	+?41.732	+?42.448
Chemical valence	+?3	+?4	+?3	+?2, +?3
Configuration of extranuclear electron	3s²3p¹	4d¹⁰5s²5p²	4d¹5s²	4f⁷5d¹6s²

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Effect of Alloying Element on Electromagnetic Interference Shielding Effectiveness of Binary Magnesium Alloys

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