Improvement of soft-magnetic properties for Fe-based amorphous alloys with high saturation polarization by stress annealing

Cai, Mingjuan; Wang, Jingjing; Wang, Qianqian; Guo, Zhijun; Luo, Qiang; Zhou, Jing; Liang, Tu; Li, Xuesong; Zeng, Qiaoshi; Shen, Baolong

doi:10.1080/21663831.2023.2199044

Cited by 10 publications

(2 citation statements)

References 46 publications

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“…The commonality in obtaining the two transitional structures is to anneal the amorphous alloy under complex fields, which is designed as a temperature field assisted by a rotating magnetic field in this study. In addition, the appropriate application of stress or electric field may also be feasible to construct transitional or criticalstate amorphous alloy because of their analogous effects on magnetic properties [54,55], which sheds new light on the design of high-performance soft magnetic amorphous alloys.…”

Section: Magnetic Structure Origin Of the Magnetic Softnessmentioning

confidence: 99%

Critical state-induced emergence of superior magnetic performances in an iron-based amorphous soft magnetic composite

Shao,

Bai,

et al. 2024

Mater. Futures

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Soft magnetic composites (SMCs) play a pivotal role in the development of high-frequency, miniaturization and complex forming of modern electronics. However, they usually suffer from a trade-off between high magnetization and good magnetic softness (high permeability and low core loss). In this work, utilizing the order modulation strategy, a critical state in a FeSiBCCr amorphous soft magnetic composite (ASMC), consisting of massive crystal-like orders (CLOs, ~1 nm in size) with the feature of α-Fe, is designed. This critical-state structure endows the amorphous powder with the enhanced ferromagnetic exchange interactions and the optimized magnetic domains with uniform orientation and fewer micro-vortex dots. Superior comprehensive soft magnetic properties at high frequency emerge in the ASMC, such as a high saturation magnetization (Ms) of 170 emu/g and effective permeability (μe) of 65 combined with a core loss (Pcv) as low as 70 mW/cm3 (0.01 T, 1 MHz). This study provides a new strategy for the development of high-frequency ASMCs, possessing suitable comprehensive soft magnetic performance to match the requirements of the modern magnetic devices used in the third-generation semiconductors and new energy fields.

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Section: Magnetic Structure Origin Of the Magnetic Softnessmentioning

confidence: 99%

Critical state-induced emergence of superior magnetic performances in an iron-based amorphous soft magnetic composite

Shao,

Bai,

et al. 2024

Mater. Futures

Self Cite

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“…[ 1–6 ] The excellent efficiency and low core loss demonstrated by Fe‐based soft magnetic bulk metallic glasses (BMGs) have generated immense interest in their use as core materials in power electronics and industrial transformers. [ 1,7 ] Soft magnetic BMGs lack crystal structures or long‐range orders, resulting in no magnetocrystalline anisotropy energy. [ 8 ] In contrast, nanocrystalline soft magnetic alloys have reduced effective magnetocrystalline anisotropy energy and thus low hysteresis loss.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Soft‐Magnetic Properties of Fe‐Based Nanocrystalline Materials with a Novel Double‐Scanning Technique

Özden,

Morley

2023

Adv Eng Mater

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This paper presents a novel scanning technique for the laser powder bed fusion (LPBF) of Fe‐based soft‐magnetic alloys, which have low glass forming ability, and microstructural change happened during LPBF process. This technique involves double scanning where: (i) the first scan applied uses high energy density (E=P/vht, where P is laser power, v is laser scan speed, h is hatch spacing and t is layer thickness) with different process parameters (P: 30, 40 and 50 W, v: 500, 600 and 700 mm/s, h: 20 and 30 µm and t: 50 µm) to achieve high density and (ii) the second scan employed before the spreading subsequent powder layer, uses low E (= 20 J/mm3, P= 20 W, v= 1000 mm/s, h= 20 µm and t= 50 µm) to refine the microstructure and thus reduce coercivity. To comprehend microstructural change, the quantity and the particle size distribution of the α‐Fe(Si) phase (main phase in the microstructure) were measured. The double scanning strategy refined the microstructure to finer crystallites with a narrow particle size distribution. This increased the saturation magnetization (M s ) to a maximum value of 226.81 Am2/kg and reduced the coercivity (H c ) to a lowest value recorded (130 A/m). Likewise, the bulk density (94.59% ‐ 99.25%) was enhanced significantly with double scanning, especially the samples produced using high P (50 W) resulting from the relieving of the mechanical and thermal stress evolving during the process.This article is protected by copyright. All rights reserved.

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Ductile Fe-based amorphous alloy with excellent soft magnetic properties induced by low-temperature stress annealing

Li,

Su,

Zhou

et al. 2024

Intermetallics

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Improvement of soft-magnetic properties for Fe-based amorphous alloys with high saturation polarization by stress annealing

Cited by 10 publications

References 46 publications

Critical state-induced emergence of superior magnetic performances in an iron-based amorphous soft magnetic composite

Critical state-induced emergence of superior magnetic performances in an iron-based amorphous soft magnetic composite

Enhancing Soft‐Magnetic Properties of Fe‐Based Nanocrystalline Materials with a Novel Double‐Scanning Technique

Ductile Fe-based amorphous alloy with excellent soft magnetic properties induced by low-temperature stress annealing

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