Hybrid amorphous soft magnetic composites with ultrafine FeSiBCr and submicron FeBP particles for MHz frequency power applications

Li, Wangchang; Xiao, Shipeng; Li, Wanjia; Ying, Yao; Yu, Jing; Zheng, Jingwu; Qiao, Liang; Li, Juan; Zhao, Tiejun; Wu, Junke; Che, Shenglei

doi:10.1016/j.jmmm.2022.169365

Cited by 27 publications

(7 citation statements)

References 34 publications

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“…However, beyond 500 °C, a significant change in the XRD diffraction pattern of SMCs is observed, indicating that a heat treatment temperature of 460 °C maximally eliminates the internal stresses in SMCs. 23 The reduction in internal stresses facilitates the magnetic domain reversal under a dynamic magnetic field, resulting in decreased power loss, consistent with the power loss measurement results of SMCs at different heat treatment temperatures shown in Figure 4d−h. The iron loss in SMCs generally results from the combined effects of hysteresis and dynamic losses.…”

Section: ■ Results and Discussionsupporting

confidence: 85%

“…As shown in Figure k, the XRD diffraction pattern of SMCs remains unchanged as the temperature increases below 460 °C. However, beyond 500 °C, a significant change in the XRD diffraction pattern of SMCs is observed, indicating that a heat treatment temperature of 460 °C maximally eliminates the internal stresses in SMCs . The reduction in internal stresses facilitates the magnetic domain reversal under a dynamic magnetic field, resulting in decreased power loss, consistent with the power loss measurement results of SMCs at different heat treatment temperatures shown in Figure d–h.…”

Section: Resultssupporting

confidence: 79%

“…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%

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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.

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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.

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Section: ■ Results and Discussionsupporting

confidence: 85%

Section: Resultssupporting

confidence: 79%

Section: Introductionmentioning

confidence: 99%

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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.

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“…For present amorphous soft magnetic materials, amorphous powders obtained by crushing a FeCuNbSiB amorphous band suffer a thickness of approximately 20 µm, which cannot effectively constrain the intra-particle eddy current loss in high frequency [17]. Though water-atomizing or gas-atomizing Fe-based amorphous powders (FeSiB, FeSiBP, FeSiBC, FeSiBCr, etc) can be obtained in the diameter of several micrometers, their related SMCs are limited by their low permeability, which prevents the miniaturization of electromagnetic devices [18]. To overcome the dilemma of high eddy current loss and low permeability in SMCs, it appears particularly important to find an amorphous magnetic particle.…”

Section: Introductionmentioning

confidence: 99%

Improved magnetic properties in amorphous FeSiBCr soft magnetic composites with easy-plane anisotropy for high-frequency applications

Huang¹,

Zhang²,

Shang³

et al. 2023

J. Phys. D: Appl. Phys.

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The miniaturization and high frequency of future electromagnetic devices require soft magnetic composites with high permeability, high working frequency and low core loss. In this work, easy-plane amorphous FeSiBCr powders with a thickness of approximately 1~2 μm are obtained by planetary ball milling and successfully fabricated into an arranged soft magnetic composite by using a rotational magnetic field. The complex permeability spectrums of the composite are measured and analyzed. Due to the planar distribution of easy magnetization axes, the amorphous easy-plane FeSiBCr/Si-resin composite shows a permeability of 31 at 1MHz. The core loss of samples is measured from 100 KHz to 5 MHz and discussed in detail. The loss separated results illustrate the eddy current loss and excess loss can be effectively reduced in amorphous easy-plane FeSiBCr/Si-resin composite. These results indicate that, compared with the amorphous none easy-plane FeSiBCr/Si-resin composite, the permeability of the amorphous easy-plane FeSiBCr/Si-resin composite is effectively improved and the core loss is reduced, making it promising for the high-frequency application.

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“…There are many types of SMCs, such as ferrites, FeSi, Sendust (FeSiAl) and Fe-based amorphous cores. Compared with traditional soft magnetic alloys, Fe-based amorphous materials have low coercivity, high resistivity and high saturation magnetization [10]. Febased amorphous bulks have been used in transformers and are estimated to be able to save approximately 30% of electrical energy.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the Properties of FeSiBCr Amorphous Soft Magnetic Composites by Annealing Treatments

et al. 2022

Metals

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Fe-based amorphous powder cores (AMPCs) were prepared from FeSiBCr amorphous powders with phosphate–resin hybrid coating. The high-frequency magnetic properties of AMPCs annealed at different temperatures were systematically studied. After annealing at low temperatures, the effective permeability and core loss improved due to the internal stress of the powder cores being released. The sample annealed at 480 °C exhibits the lowest hysteresis loss of about 29.6 mW/cm3 at 800 kHz as well as a maximum effective permeability of 36.4, remaining stable until 3 MHz, which could be useful for high-frequency applications.

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Hybrid amorphous soft magnetic composites with ultrafine FeSiBCr and submicron FeBP particles for MHz frequency power applications

Cited by 27 publications

References 34 publications

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

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

Improved magnetic properties in amorphous FeSiBCr soft magnetic composites with easy-plane anisotropy for high-frequency applications

Enhancing the Properties of FeSiBCr Amorphous Soft Magnetic Composites by Annealing Treatments

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