High electromagnetic wave absorption performance from all-scale hierarchically defective Ni-Mn-Co-Cu-Al high entropy alloys@carbon

被引：7

作者：

Gang, Shuangfu ^{[1
]}

Qian, Yongxin ^{[1
]}

Xiong, Tianshun ^{[1
]}

Li, You ^{[1
]}

Li, Wang ^{[1
]}

Ma, Zheng ^{[1
]}

Zhang, Wenguang ^{[1
]}

Long, Hui ^{[1
]}

Wei, Yingchao ^{[1
]}

Li, Xin ^{[1
]}

Jiang, Qinghui ^{[1
]}

Luo, Yubo ^{[1
]}

Yang, Junyou ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 499卷

基金：

中国国家自然科学基金;

关键词：

Electromagnetic wave absorption; High entropy alloy; Nanotwins; Heterojunction;

D O I：

10.1016/j.cej.2024.156254

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

All-scale hierarchical defects induced by structural designing from unit cell to mesoscale play a significant role in oscillating and dissipating electromagnetic wave energy under external microwave radiation. To construct such all-scale hierarchical defects, hereby, high-entropy alloy nanoparticles coated by microscale carbon (HEA@C) with a core-shell structure were obtained by carbonizing Ni-Mn-Co-Cu-Al metal-organic. Thus, all-scale hierarchical defects were gained, including lattice distortion and nanotwins caused by the high entropy effect, vacancy and topological defects within carbon, and the heterojunction between high entropy nanoparticles and carbon. These all-scale hierarchical defects combined with the magnetic and conductive nature of HEA@C enable us to achieve a high electromagnetic wave absorption performance, with a reflection loss (RLmin) value of -52.36 dB and an effective absorption bandwidth (EAB) of 5.01 GHz. It implies that HEA@C should be an effective electromagnetic wave (EMW) absorber.

引用

页数：10

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