The influence of FeNi nanoparticles on the microstructures and soft magnetic properties of FeSi soft magnetic composites |
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| Affiliation: | 1. Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, Zhejiang 315201, China;2. Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, China;3. Baowu Environmental Technology Wuhan Metal Resources Co., Ltd., Wuhan, Hubei 430000, China;4. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | In this work, a new type of FeSi/FeNi soft magnetic powder core (SMPC) was successfully fabricated by coating FeNi nanoparticles on the surface of FeSi micrometer powder. The effects of different contents of FeNi nanoparticles on the micromorphology, internal structures, and soft magnetic properties of SMPCs were studied. The results show that FeNi nanoparticles adhere to the surface of FeSi powder, which can effectively fill the air gap between FeSi powder and is beneficial to the compaction of the powder cores during the pressing process. Thus, the density of the SMPCs is increased. Compared to FeSi SMPCs, the comprehensive soft magnetic properties of FeSi/FeNi SMPCs have been greatly improved. When adding 15 wt% FeNi nanoparticles, the SMPCs exhibit excellent magnetic properties with high effective permeability (increased by 43.8 %) and low core loss (decreased by 22.1 %). The high performance FeSi/FeNi SMPCs prepared in this work are expected to be widely used in power choke coils, uninterruptible power supplies, and boosts and inverter inductors. |
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| Keywords: | Soft magnetic powder cores FeNi nanoparticles Permeability Low core loss |
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