通过磷化和铁氧体涂层提高fesal软磁复合材料的磁导率和降低损耗

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-10-06 DOI:10.1016/j.jallcom.2025.184258

Meng Jin, Fan Zhao, Ming Liu

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引用次数: 0

摘要

fesal软磁复合材料（SMCs）是5g通信和电动汽车中高频电力电子器件的有希望的候选者，但其性能受到脆性磷酸盐涂层和铁氧体集成困难的限制。本文系统地优化了磷化浓度，并探索了两种Ni-Zn铁氧体涂层策略。梯度实验确定0.2 wt%磷化为最佳。与原位化学方法相比，物理混合铁氧体涂层具有更高的磁导率（μₑ≈180），优异的频率稳定性（Δμ<； 10 kHz - 1 MHz时5%）和低功耗（165.26 mW/cm3 @50 kHz, 100 mT）。显微结构和磁性表征，以及损耗分离分析，证实了改进源于保持绝缘完整性和抑制涡流。该研究为开发下一代电力电子高性能fesal SMCs提供了可扩展的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Enhanced permeability and reduced loss in FeSiAl soft magnetic composites via phosphating and ferrite coating

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Enhanced permeability and reduced loss in FeSiAl soft magnetic composites via phosphating and ferrite coating

FeSiAl soft magnetic composites (SMCs) are promising candidates for high-frequency power electronics in 5 G communication and electric vehicles, but their performance is limited by brittle phosphate coatings and difficulties in ferrite integration. In this work, we systematically optimized phosphating concentration and explored two Ni-Zn ferrite coating strategies. Gradient experiments identified 0.2 wt% phosphating as optimal. The physically blended ferrite coating exhibited superior performance compared to the in-situ chemical method, delivering high permeability (μₑ≈180), excellent frequency stability (Δμ<5% in 10 kHz–1 MHz) and low power loss (165.26 mW/cm³ @50 kHz, 100 mT). Microstructural and magnetic characterizations, together with loss separation analysis, confirmed that the improvements originated from preserved insulation integrity and suppressed eddy currents. This study provides a scalable route for developing high-performance FeSiAl SMCs for next-generation power electronics.

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.