The Magnetic Properties and Glass Formation Ability of the Fe 80 Si 8 B 6 Nb 5 Cu Amorphous-Nanocrystalline Alloys with
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ORIGINAL PAPER
The Magnetic Properties and Glass Formation Ability of the Fe80Si8B6Nb5Cu Amorphous-Nanocrystalline Alloys with Different Phosphorus Addition Zongyang Zhang 1 & Zhongmin Jiang 1 & Lingbing Meng 1
&
Haichen Yu 1 & Hongqiu Ma 1 & Lidong Guan 1
Received: 13 April 2020 / Accepted: 1 October 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract We prepared Fe80Si8B6Nb5Cu amorphous-nanocrystalline strips with different phosphorus addition by the melt spinning method, and their nanocrystalline magnetic powder core was obtained after a series of processing. Then, the microstructure, micromorphology, thermal behavior, and magnetic properties were studied. The results show that the atomic radius difference (σ) affected the glass formation ability; thus, first, the grain size and coercivity decreased and then increased. The (Fe80Si8B6Nb5Cu)99P nanocrystalline core has the better comprehensive magnetic properties than those of Fe80Si8B6Nb5Cu; its μe (75.93) is 5% higher, and Pcm (370 W/kg) is 14% lower than those of Fe80Si8B6Nb5Cu (i.e., 72.98 and 431.2 W/kg, respectively). Keywords Nanocrystalline powder core . P elements . Glass formation ability . Magnetic properties
1 Introduction The FeSiB soft magnetic alloy is essential in the amorphous alloy industry because of its high magnetic properties, low cost, and good glass–forming ability (GFA) [1–5]. The structure with a long-range disorder endows amorphous alloys with a higher resistivity and lower coercivity [6–8]. When Cu, Cr, and Nb are added to the FeSiB amorphous alloy, many nanocrystalline grains with similar sizes are formed in the amorphous matrix [9–11]. In the obtained structure, when the amorphous matrix and nanocrystalline phase are in certain proportion, the positive and negative magnetostrictive effects cancel each other out, which will make the alloy have high permeability and very low coercivity [6, 9, 12]. A strong exchange coupling between nanocrystalline grains is strengthened, which results in a higher saturation magnetization. On the basis of Fe-based nanocrystalline alloys, nanocrystalline magnetic powder cores were prepared by the crushing method; the prepared cores inherited high permeability and high saturation magnetization. The resistivity of the magnetic
* Lingbing Meng [email protected] 1
Antai (Bazhou) Special Powder Co., Ltd, Langfang 065000, China
powder core considerably increases owing to the air gap and an insulator, which results in a sharp decrease in the eddy current loss; thus, the core exhibits good frequency characteristics [1, 13–15]. The excellent comprehensive soft magnetic properties of the nanocrystalline magnetic powder core meet the requirements of light weight, high frequency, miniaturization, and low loss of inductors in the electronics industry. To reduce the core loss and cost of nanocrystalline magnetic powder, we added different amounts of P into Fe80Si8B6Nb5Cu alloys and studied the microstructure, micromorphology, and thermal behavior of the Fe80Si8B6Nb5Cu nanocr
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