首页|Rare earth lanthanum pinning effect for corrosion resistance ultraefficient microwave absorption FeCo@rGO composites

Rare earth lanthanum pinning effect for corrosion resistance ultraefficient microwave absorption FeCo@rGO composites

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Magnetic metal absorbers exhibit remarkable microwave absorption capacity.However,their practical application is severely limited due to their susceptibility to corrosion,particularly in marine environ-ments.To address this challenge,we propose a novel approach involving the modification and control of FeCo/rGO microwave absorbers using rare earth lanthanum(La).This strategy aims to achieve both high-performance microwave absorption and enhanced resistance to marine corrosion.In this study,we employ a La2O3 modifying control strategy to refine the FeCo magnetic particles and coat them with CoFe2O4 on the surface,leveraging the pinning effect of in situ generated La2O3.This process enhances the interface polarization of the absorbers,thereby improving their electromagnetic performance and ma-rine corrosion resistance.Consequently,the La2O3 modified FeCo@rGO composites exhibit broadband ab-sorption,covering a wide frequency range of 6.11 GHz at 1.55 mm.Notably,the electromagnetic proper-ties of the La2O3 modified FeCo@rGO absorbers remain stable even after prolonged exposure to a 3.5 wt％NaCI solution,simulating marine conditions,for at least 15 days.Furthermore,we perform first-principle calculations on FeCo and FeCo-O to validate the corrosion resistance of the La2O3 modified FeCo@rGO composites at the atomic level.This comprehensive investigation explores the control of rare earth lan-thanum modification on the size of magnetic metal particles,enabling efficient electromagnetic wave absorption and marine corrosion resistance.The results of this study provide a novel and facile strategy for the control of microwave absorbers,offering promising prospects for future research and development in this field.

Rare earth lanthanumFeCo@rGOMicrowave absorptionMarine corrosion resistance

Junru Yao、Jintang Zhou、Lu Lu、Feng Yang、Zhengjun Yao、Bo Ouyang、Erjun Kan、Yuxin Zuo、Renchao Che、Fan Wu

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College of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China

Ministry of Industry and Information Technology,Key Laboratory of Material Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Astronautics),Nanjing 211100,China

MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing,School of Science,Nanjing University of Science and Technology Nanjing 210094,China

School of Chemistry and Chemical Engineering,Anhui University,Hefei 230601,China

Laboratory of Advanced Materials,Shanghai Key Lab of Molecular Catalysis and Innovative Materials,Department of Materials Science,Fudan University,Shanghai 200438,China

School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

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National Key R&D Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural science Foundation of Jiangsu ProvinceScientific Research Fund of AnHui Provincial Education DepartmentOpen Fund of Key Laboratory of Materials Preparation and Protection for Harsh Environment(Nanjing University of Aeronautics and Ministry of Industry and Information Technology

2021YFB35025005217209152172295BK20211199KJ2021A003456XCA22042

2024

10.1016/j.jmst.2023.07.075

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.177(10)
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