Characteristics of Fe-Si-B-P-Cu nanocrystalline soft magnetic alloy powders with high Bs

Miho Chiba; Akiri Urata; Hiroyuki Matsumoto; Shigeyoshi Yoshida; Akihiro Makino

doi:10.1109/TMAG.2011.2158518

Characteristics of Fe-Si-B-P-Cu nanocrystalline soft magnetic alloy powders with high Bs

Miho Chiba, Akiri Urata, Hiroyuki Matsumoto, Shigeyoshi Yoshida, Akihiro Makino

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Nanocrystalline soft magnetic alloy powders produced by heat treating amorphous powders are expected to improve properties and miniaturize dust cores because of their low coercive force H_c and high saturation magnetic flux density B_s. By water atomization process, we successfully obtained quenched Fe-Si-B-P-Cu alloy powders with spherical particle shape. The obtained powders have different average particle sizes of 2.0, 3.0, 5.0, and 8.5 μm. After annealing at 723 K, the as-quenched alloy powders are crystallized and B_s of the nanocrystalline alloy powders with Fe _83.3Si₄B₈P₄Cu_0.7 and Fe_84.8Si₂B₁₀P₂Cu_1.2 exhibit high B_s of 1.72 and 1.76 T, respectively. Core loss characteristics of the dust cores are found to be dependent on amorphous stability of the as-quenched powders. Thus, the Fe_83.3Si ₄B₈P₄Cu_0.7 nanocrystalline alloy powder with an average particle size of 3.0 μm exhibits the best core loss of 1461 kW/m³ (B_m=50 mT, f=300 kHz).

Original language	English
Article number	6027580
Pages (from-to)	2845-2847
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	47
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2011.2158518
Publication status	Published - 2011 Oct
Externally published	Yes

Keywords

Fe-Si-B-P-Cu alloy
high saturation magnetic flux density
nanocrystal
soft magnetic powder

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2011.2158518

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abstract = "Nanocrystalline soft magnetic alloy powders produced by heat treating amorphous powders are expected to improve properties and miniaturize dust cores because of their low coercive force Hc and high saturation magnetic flux density Bs. By water atomization process, we successfully obtained quenched Fe-Si-B-P-Cu alloy powders with spherical particle shape. The obtained powders have different average particle sizes of 2.0, 3.0, 5.0, and 8.5 μm. After annealing at 723 K, the as-quenched alloy powders are crystallized and Bs of the nanocrystalline alloy powders with Fe 83.3Si4B8P4Cu0.7 and Fe84.8Si2B10P2Cu1.2 exhibit high Bs of 1.72 and 1.76 T, respectively. Core loss characteristics of the dust cores are found to be dependent on amorphous stability of the as-quenched powders. Thus, the Fe83.3Si 4B8P4Cu0.7 nanocrystalline alloy powder with an average particle size of 3.0 μm exhibits the best core loss of 1461 kW/m3 (Bm=50 mT, f=300 kHz).",

keywords = "Fe-Si-B-P-Cu alloy, high saturation magnetic flux density, nanocrystal, soft magnetic powder",

author = "Miho Chiba and Akiri Urata and Hiroyuki Matsumoto and Shigeyoshi Yoshida and Akihiro Makino",

year = "2011",

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AU - Chiba, Miho

AU - Urata, Akiri

AU - Matsumoto, Hiroyuki

AU - Yoshida, Shigeyoshi

AU - Makino, Akihiro

PY - 2011/10

Y1 - 2011/10

N2 - Nanocrystalline soft magnetic alloy powders produced by heat treating amorphous powders are expected to improve properties and miniaturize dust cores because of their low coercive force Hc and high saturation magnetic flux density Bs. By water atomization process, we successfully obtained quenched Fe-Si-B-P-Cu alloy powders with spherical particle shape. The obtained powders have different average particle sizes of 2.0, 3.0, 5.0, and 8.5 μm. After annealing at 723 K, the as-quenched alloy powders are crystallized and Bs of the nanocrystalline alloy powders with Fe 83.3Si4B8P4Cu0.7 and Fe84.8Si2B10P2Cu1.2 exhibit high Bs of 1.72 and 1.76 T, respectively. Core loss characteristics of the dust cores are found to be dependent on amorphous stability of the as-quenched powders. Thus, the Fe83.3Si 4B8P4Cu0.7 nanocrystalline alloy powder with an average particle size of 3.0 μm exhibits the best core loss of 1461 kW/m3 (Bm=50 mT, f=300 kHz).

AB - Nanocrystalline soft magnetic alloy powders produced by heat treating amorphous powders are expected to improve properties and miniaturize dust cores because of their low coercive force Hc and high saturation magnetic flux density Bs. By water atomization process, we successfully obtained quenched Fe-Si-B-P-Cu alloy powders with spherical particle shape. The obtained powders have different average particle sizes of 2.0, 3.0, 5.0, and 8.5 μm. After annealing at 723 K, the as-quenched alloy powders are crystallized and Bs of the nanocrystalline alloy powders with Fe 83.3Si4B8P4Cu0.7 and Fe84.8Si2B10P2Cu1.2 exhibit high Bs of 1.72 and 1.76 T, respectively. Core loss characteristics of the dust cores are found to be dependent on amorphous stability of the as-quenched powders. Thus, the Fe83.3Si 4B8P4Cu0.7 nanocrystalline alloy powder with an average particle size of 3.0 μm exhibits the best core loss of 1461 kW/m3 (Bm=50 mT, f=300 kHz).

KW - Fe-Si-B-P-Cu alloy

KW - high saturation magnetic flux density

KW - nanocrystal

KW - soft magnetic powder

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Characteristics of Fe-Si-B-P-Cu nanocrystalline soft magnetic alloy powders with high Bs

Abstract

Keywords

ASJC Scopus subject areas

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