Improvement for soft magnetic properties of FeSiBCuNb nanocrystalline powder cores by adding FeNi powder

• Published in: Journal of non-crystalline solids Vol. 646; p. 123260
• Main Authors: Song, Yanyan, Zhou, Shaoxiong, Zhang, Zhi, Zhang, Ruibiao, Li, Xiantao, Jing, Xueyan
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2024
• Subjects: FeNi powders; FeSiBCuNb nanocrystalline powders; Soft magnetic composites; Soft magnetic properties; Soft magnetic properties; FeNi powders; Soft magnetic composites; FeSiBCuNb nanocrystalline powders
• ISSN: 0022-3093
• DOI: 10.1016/j.jnoncrysol.2024.123260

•The addition of FeNi improves the compressibility and densities of FeSiBCuNb/FeNi composite powder cores.•The magnetic properties of FeSiBCuNb/FeNi composite powder cores can be controlled by adjusting the FeNi content.•With the addition of 50 wt% FeNi, the composite powder cores exhibit excellent electromagnetic properties, with a μe of 59.3, a DC-bias performance of 65.6% at a DC magnetic field strength of 100 Oe, and a Pcv of 99.8 kW/m3 at 100 kHz under 50 mT conditions. FeSiBCuNb nanocrystalline powder was mixed with FeNi at varying weight ratios to fabricate toroidal powder cores through cold pressing. The effect of FeNi powder content on the soft magnetic properties of the powder cores was meticulously investigated, leading to a meaningful discovery. The optimal performance was achieved when the FeNi ratio is 50 wt.%, with a μe of 59.3, a DC-bias performance of 65.6% at a DC magnetic field strength of 100 Oe, and a Pcv of 99.8 kW/m3 at 100 kHz under 50 mT conditions. Compared to the powder cores without FeNi addition, there was a remarkable improvement in μe by 91% and a significant reduction in Pcv by 45.4%. This improvement can be attributed to the role of FeNi as void-filling particles, which effectively enhance the soft magnetic properties of the nanocrystalline FeSiBCuNb powder cores.