Abstract
Fe3Al powders with different Al contents were prepared by a mechanical alloying and ordering process. The obtained flake-like structure has the average size of approximately 2 µm and the average thickness of around 300 nm. The Al content affects the magnetic properties of the obtained samples. With the increase of Al content from 22 to 30 at.%, the saturation magnetization of the sample increases from 161.9 to 167.5 emu/g. However, when the Al content is further increased to 32 at.%, the saturation magnetization decreases to 163.3 emu/g. When the Al content is 30 at.%, the flake Fe3Al powder has a minimum reflection loss value of − 50.5 dB. When the thickness is 1.25 mm, the bandwidth is as large as 6.0 GHz with a reflection loss value more negative than − 10 dB. The excellent electromagnetic wave absorption performance is attributed to the best impedance matching ratio and the excellent attenuation coefficient.
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Acknowledgements
This work was financially supported by National Natural Science Foundation of China (Grant Nos. 52005384 and 51871173), the fund of the State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology (No. SKLAB02019003), the Natural Science Basic Research Program of Shaanxi (No. 2020JQ-909), and the Scientific Research Program Funded by the Shaanxi Provincial Education Department (20JK0693).
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KZ involved in data curation, formal analysis, investigation, and writing—original draft preparation. XL contributed to writing—review and editing, supervision, project administration, and funding acquisition. HX participated in resources, supervision, writing—review and editing, and funding acquisition.
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Zhang, K., Luo, X. & **e, H. Tuning the Al content for flake Fe3Al powder to achieve wideband electromagnetic wave absorption. J Mater Sci: Mater Electron 33, 13290–13302 (2022). https://doi.org/10.1007/s10854-022-08268-9
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DOI: https://doi.org/10.1007/s10854-022-08268-9