The percolation effect and optimization of soft magnetic properties of FeSiAl magnetic powder cores

Bai, Ruru; Zhu, Zhenghou; Zhao, Hui; Mao, Shenghua; Zhong, Qi

doi:10.1016/j.jmmm.2017.03.016

Cited by 53 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2) The circumferential crack was observed at the outer surface of the AMPCs when the mass ratio of the P1 powders was greater than 30 wt.%. This could be due to the increasing number of large pores induced by the increase of the coarse particles (P1 powders with the particle size distribution of 140-170 mesh), which was detrimental to the formability enhancement of the AMPCs [28]. 3The AMPCs' green compact density, ρ, the effective permeability, μe, and the residual effective permeability at the applied Table 1 lists the characterization of particle size distribution, green compact density, ρ, effective permeability, µ e , and core loss, P c , for the AMPCs with different matching ratios (mass percent) of P1/P2/P3%.…”

Section: Methodsmentioning

confidence: 99%

“…(2) The circumferential crack was observed at the outer surface of the AMPCs when the mass ratio of the P1 powders was greater than 30 wt.%. This could be due to the increasing number of large pores induced by the increase of the coarse particles (P1 powders with the particle size distribution of 140-170 mesh), which was detrimental to the formability enhancement of the AMPCs [28]. 3The AMPCs' green compact density, ρ, the effective permeability, µ e , and the residual effective permeability at the applied magnetizing field of 7.96 kA/m, µ e @7.96 kA/m, increased first and then decreased with the increasing size of D50, and exhibited a maximum ρ of 5.66 g/cm 3 and a maximum µ e of 65.54, as the mass ratios of the P1%/P2%/P3% powders were 20:70:10 and 30:60:10, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, the µ e and ρ gradually decrease from 64.54 to 53.10, and from 5.66 g/cm 3 to 5.55 g/cm 3 . For the AMPCs of numbers 3, 4, and 5, the ratio of the coarse powders (P1) increased from 20 wt.% to 40 wt.%, which would lead to the increasing number of large pores in the AMPCs [28]. Accordingly, the ρ gradually decreased from 5.66 g/cm 3 to 5.52 g/cm 3 .…”

Section: Particle Size Distributionmentioning

confidence: 99%

See 2 more Smart Citations

Strategy to Enhance Magnetic Properties of Fe78Si9B13 Amorphous Powder Cores in the Industrial Condition

Sun

Chen

Lin

2019

Metals

View full text Add to dashboard Cite

In this study, the soft magnetic properties of Fe78Si9B13 amorphous magnetic powder cores (AMPCs) were enhanced by coordinately adjusting the technological parameters, including the particle size distribution, molding pressure, and coating agent content, in the industrial condition. The results show that the optimized comprehensive soft magnetic properties of the Fe78Si9B13 AMPCs could be obtained under the following process conditions: (1) the distribution of particle size is 20 wt.% for 140–170 mesh, 70 wt.% for 170–270 mesh, and 10 wt.% for 270–400 mesh; (2) the molding pressure is in the range of 2.35–2.45 GPa; and (3) the additive amount of sodium silicate is 1.5 wt.%. After the collaborative optimization, the AMPCs’ compact density, ρ, the effective permeability, μe, and the residual effective permeability at the applied magnetizing field of 7.96 kA/m, μe@7.96 kA/m, increased from 5.61 g/cm3 to 5.86 g/cm3, from 58.13 to 77.01, and from 40.36 to 49.57, respectively. The attenuation ratio of the effective permeability, when in the frequency band of 20–100 kHz, was less than 0.85%. The core loss at the 50 kHz for the maximum magnetic flux density of 0.1 T reduced from 380.85 mW/cm3 to 335.23 mW/cm3. This work will encourage the further application of Fe-based AMPCs in the fields of electronics and telecommunication.

show abstract

Section: Methodsmentioning

confidence: 99%

“…(2) The circumferential crack was observed at the outer surface of the AMPCs when the mass ratio of the P1 powders was greater than 30 wt.%. This could be due to the increasing number of large pores induced by the increase of the coarse particles (P1 powders with the particle size distribution of 140-170 mesh), which was detrimental to the formability enhancement of the AMPCs [28]. 3The AMPCs' green compact density, ρ, the effective permeability, µ e , and the residual effective permeability at the applied magnetizing field of 7.96 kA/m, µ e @7.96 kA/m, increased first and then decreased with the increasing size of D50, and exhibited a maximum ρ of 5.66 g/cm 3 and a maximum µ e of 65.54, as the mass ratios of the P1%/P2%/P3% powders were 20:70:10 and 30:60:10, respectively.…”

Section: Methodsmentioning

confidence: 99%

Section: Particle Size Distributionmentioning

confidence: 99%

See 1 more Smart Citation

Strategy to Enhance Magnetic Properties of Fe78Si9B13 Amorphous Powder Cores in the Industrial Condition

Sun

Chen

Lin

2019

Metals

View full text Add to dashboard Cite

show abstract

“…Soft magnetic composites (SMCs) are widely used in a variety of electromagnetic applications due to their superior magnetic properties, including high permeability and low coercivity. − Non-crystalline or amorphous materials have unique properties that make them attractive for use in SMCs. , Amorphous SMCs (ASMCs) have received significant attention due to their high saturation induction, low eddy current losses, and excellent frequency-dependent magnetic properties. , Research on ASMCs has mainly focused on the preparation of ASMCs, the characterization of their microstructure, and their magnetic properties. − Various preparation methods have been proposed, such as powder metallurgy, hot pressing, spark plasma sintering, and additive manufacturing. − Among these methods, powder metallurgy is the most widely used technique. , Researchers have explored the effects of different preparation parameters on the microstructure and magnetic properties of ASMCs, including particle size, compaction pressure, annealing temperature, and cooling rate. − These parameters can significantly affect the magnetic properties of ASMCs, such as permeability, coercivity, power loss, and saturation induction.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Properties of High DC Bias Performance Fe-Si-B-C-Cr Amorphous Soft Magnetic Composites

Shen,

Wang,

Liu

et al. 2023

ACS Appl. Electron. Mater.

View full text Add to dashboard Cite

The present study investigates three types of Fe-Si-B-C-Cr non-crystalline magnetic powder and their effects on the magnetic properties of soft magnetic composites. Specifically, the study examines the impact of heat treatment temperature and particle size distribution. The results indicate a positive correlation between the size of the magnetic powder particles and saturation magnetization. Changes in heat treatment temperature similarly affected the magnetic properties of the three soft magnetic composites, with the optimal temperature for heat treatment determined to be 460 °C. Nonlinear fitting was used to separate the total loss, and it was found that non-crystalline soft magnetic composites made with small-sized magnetic powder exhibited lower eddy current loss under MHz magnetic field conditions. The relaxation phenomenon observed in the hysteresis loop with increasing frequency under a dynamic magnetic field explains the mechanism of power loss variation in soft magnetic composite materials with respect to magnetic field frequency and magnetic induction intensity. A high-performance non-crystalline soft magnetic composite with a power consumption of 372 kW/m3 was obtained at a magnetic induction intensity of 20 mT and a frequency of 1 MHz. Which demonstrated excellent stability under MHz magnetic field conditions as well as excellent DC bias characteristics, with a relative permeability above 90% under a DC bias magnetic field of 7.96 kA/m.

show abstract

“…It is demonstrated that the dimensions, purity, and size distribution of the magnetic particulate has tremendous influences on the microstructure and electromagnetic performance of the powder cores [18,19]. Some authors investigated the influence of the particle size of the powder on the core's magnetic properties [20,21]. Nevertheless, little attention has been devoted to the effect of particle size distribution on hysteresis loss, eddy current loss, and permeability of SMPCs.…”

Section: Introductionmentioning

confidence: 99%

Fe-6.5 wt%Si Powder Cores with Low Core Loss by Optimizing Particle Size Distribution

Huang

Jiao²,

Yu³

et al. 2020

Metals

View full text Add to dashboard Cite

The effect of different particle size distribution of Fe-6.5 wt%Si powder on the microstructure and soft magnetic properties of the corresponding soft magnetic powder cores (SMPCs) was investigated. By optimizing particle size distribution, the density of SMPCs increased and the total core loss significantly decreased. According to the result of loss separation, density of SMPCs is inversely proportional to hysteresis loss, while with increasing the content of the fine particles, the eddy current loss significantly decreased. It was found that with magnetic powder of particle size-grading as 10%, 10%, 60%, and 20% for particles with size between −75 to +38, −38 to +23, −23 to +13, and −13 μm, respectively, the Fe-6.5 wt%Si SMPCs exhibit optimal comprehensive magnetic performances with the effective permeability of about 60, the percent permeability at 100 Oe is up to 70%, and the lowest core loss of 553 mW/cm3.

show abstract

The percolation effect and optimization of soft magnetic properties of FeSiAl magnetic powder cores

Cited by 53 publications

References 20 publications

Strategy to Enhance Magnetic Properties of Fe78Si9B13 Amorphous Powder Cores in the Industrial Condition

Strategy to Enhance Magnetic Properties of Fe78Si9B13 Amorphous Powder Cores in the Industrial Condition

Magnetic Properties of High DC Bias Performance Fe-Si-B-C-Cr Amorphous Soft Magnetic Composites

Fe-6.5 wt%Si Powder Cores with Low Core Loss by Optimizing Particle Size Distribution

Contact Info

Product

Resources

About