冷凝回流法制备FeCo合金及其吸波性能

Preparation and Microwave-Absorbing Properties of FeCo Alloys by Condensation Reflux Method.

作者信息

Liu Zhen, Wang Bo, Wei Shicheng, Huang Wei, Wang Yujiang, Liang Yi, Li Junqi, Wang Xinyang, Su Hongyi

机构信息

National Key Laboratory for Remanufacturing, Army Academy of Armored Forces, Beijing 100072, P. R. China.

Department of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033, P. R. China.

出版信息

ACS Omega. 2024 Jul 24;9(31):33692-33701. doi: 10.1021/acsomega.4c02330. eCollection 2024 Aug 6.

DOI:10.1021/acsomega.4c02330

PMID:39130559

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11307279/

Abstract

Five groups of FeCo alloy samples with different atomic ratios of Fe/Co (3:7, 4:6, 5:5, 6:4, 7:3) were prepared using the condensation reflux method. The results indicate that varying the atomic ratios of Fe/Co has a significant impact on the microstructure, electromagnetic parameters, and microwave absorption properties of FeCo alloys. As the Fe atom content increases, the morphology of the FeCo alloys transitions from irregular flower-shaped to uniformly spherical and eventually to lamellar. The attenuation of electromagnetic waves in the five groups of alloys is primarily due to magnetic loss. Among them, FeCo exhibits the best absorption performance, with a minimum reflection loss (RL) value of -35.56 dB at a frequency of 10.40 GHz when the matching thickness is 7.90 mm. Additionally, at a matching thickness of 5.11 mm, the maximum effective absorption bandwidth (EAB) reached 2.56 GHz (15.44-18 GHz).

摘要

采用冷凝回流法制备了五组不同Fe/Co原子比（3:7、4:6、5:5、6:4、7:3）的FeCo合金样品。结果表明，改变Fe/Co原子比对FeCo合金的微观结构、电磁参数和微波吸收性能有显著影响。随着Fe原子含量的增加，FeCo合金的形貌从不规则的花状转变为均匀的球状，最终转变为层状。五组合金中电磁波的衰减主要是由于磁损耗。其中，FeCo表现出最佳的吸收性能，当匹配厚度为7.90 mm时，在10.40 GHz频率下的最小反射损耗（RL）值为-35.56 dB。此外，在匹配厚度为5.11 mm时，最大有效吸收带宽（EAB）达到2.56 GHz（15.44 - 18 GHz）。