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Robust carbon bridge to construct double-shell FeCo@C@Al2O3 heterogeneous structure with dual-function for extraordinary microwave absorption and anti-corrosion
Applied Surface Science ( IF 6.7 ) Pub Date : 2023-06-01 , DOI: 10.1016/j.apsusc.2023.157626
Qihui Sun, Xiong He, Baoshan Wu, Hongyan Zhang, Jinyao Li, Nasir Mahmood, Xian Jian

The complexity of the environment leads to corrosion and failure of absorbing functions. The encapsulation and surface modification of multi-gradient structures are typical ways to address this challenge. Herein, a FeCo@C@Al2O3 core–shell heterostructure is developed for the dual functions of absorbing and anti-corrosion using the chemical vapor deposition and hydrolysis of the aluminum sulfate. This unique double-shell structure provides more multiple interface relaxation polarizations, electromagnetic wave scatterings. And the robust carbon layer produces sufficient conduction loss for the FeCo@C@Al2O3. Compared with pure FeCo, the absorption capacity of FeCo@C@Al2O3 increases up to 1.4 times, the minimum reflection loss value achieves −46.7 dB at the thickness of 1.4 mm. And the maximum effective absorption bandwidth is up to 9.3 GHz. While it possesses minimum total RCS value of −13.29 dB∙m2, reflecting the optimal absorbing stealth performance. Besides, the coating Al2O3 layer effectively isolates the diffusion of corrosion ions including Cl-, H2O and O2, the corrosion current and polarization resistance of FeCo@C@Al2O3 are well adjusted to 7.96 × 10-8 A/cm2 and 5.40 × 105 Ω·cm2, respectively. Therefore, the FeCo@C@Al2O3 heterostructure provides an updated platform for the research and development of new absorbing and anti-corrosion materials.



中文翻译:

坚固的碳桥构建具有双重功能的双壳 FeCo@C@Al2O3 异质结构,具有出色的微波吸收和防腐性能

环境的复杂性导致吸收功能的腐蚀和失效。多梯度结构的封装和表面改性是应对这一挑战的典型方法。在此,利用硫酸铝的化学气相沉积和水解,开发了具有吸收和防腐双重功能的FeCo@C@Al 2 O 3核壳异质结构。这种独特的双壳结构提供了更多的界面弛豫极化、电磁波散射。坚固的碳层为 FeCo@C@Al 2 O 3产生足够的传导损耗。与纯FeCo相比,FeCo@C@Al 2 O 3的吸附能力增加了 1.4 倍,最小反射损耗值在 1.4 mm 厚度处达到-46.7 dB。最大有效吸收带宽高达 9.3 GHz。而其最小总RCS值为-13.29 dB∙m 2,体现了最佳的吸波隐身性能。此外,Al 2 O 3涂层有效隔离了Cl -、H 2 O和O 2等腐蚀离子的扩散,FeCo@C@Al 2 O 3的腐蚀电流和极化电阻均得到很好的调节,达到7.96×10 - 8 A/cm 2和5.40 × 10 5 Ω·cm 2, 分别。因此,FeCo@C@Al 2 O 3异质结构为新型吸波防腐材料的研发提供了一个更新的平台。

更新日期:2023-06-01
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