Magnetic Properties of Fe-Based Amorphous Powders With High-Saturation Induction Produced by Spinning Water Atomization Process (SWAP)

Otsuka, Isamu; Wada, Kouichi; Maeta, Yu; Kadomura, Takeshi; Yagi, M.

doi:10.1109/tmag.2008.2002249

Cited by 55 publications

(11 citation statements)

References 4 publications

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“…When the flux is distributed uniformly, the core loss of the transformer could be smaller. The authors of [6][7][8][9][10][11][12] literatures indicated that the magnetostriction is the main factor causing core vibration and audible noise. The variation of materials' magnetisation due to the applied magnetic field changes the magnetostrictive strain until reaching its saturation value.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties and vibration characteristics of amorphous alloy strip and its combination

Liu

Noubissi

et al. 2019

IET Electric Power Applications

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Although the cores made with amorphous metal alloy have lowered no-load losses compared with the orientation silicon steel cores, a high cost and noise level are inevitable because the magnetostriction for amorphous metal alloy strip is larger than the ordinary one. This study mainly focused on the experimental systems and methods for magnetic properties measurement, vibration characteristics and noise level of amorphous alloy strip and combinations. The vibration characteristics and noise level of amorphous alloy composite strip were also studied. The influence of the annealing process on magnetic energy, vibration characteristics and noise level of amorphous alloy core were analysed in detail as well. All the testing results and analysis above are helpful for the transformer manufacturers, and they can replace the expensive amorphous alloy metal strip with the combinations to reduce the noise and cost of the cores.

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Section: Introductionmentioning

confidence: 99%

Magnetic properties and vibration characteristics of amorphous alloy strip and its combination

Liu

Noubissi

et al. 2019

IET Electric Power Applications

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“…On the other hand, an excellent compactability of the amorphous powder is expected to make the core shape more complicated and smaller. [6][7][8][9] Recently, several production processes such as Spinning-water-atomization process(SWAP ® ) 8 have been proposed to produce Fe-based amorphous powders. The process have much contribution for producing Fe-based amorphous powder even with a high Fe content because of their high cooling rates of exceeding to 10 6 K/s.…”

Section: Introductionmentioning

confidence: 99%

Unusual high Bs for Fe-based amorphous powders produced by a gas-atomization technique

et al. 2016

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Fe-based alloy powders with a high Fe content of about 81 at.% were produced by a gas-atomization technique. Powders of Fe81Si1.9B5.7P11.4 (at.%) alloy showed a good glass forming ability and exhibited unusual high saturation magnetic flux density of 1.57 T. The core-loss property at a frequency of 100 kHz for the compacted core made of the Fe81Si1.9B5.7P11.4 powder is evaluated to be less than 500 kW/m3 under a maximum induction of 100 mT. Moreover, good DC-superposition characteristic of the core was also confirmed. These results suggest that the present Fe-based alloy powder is promising for low-loss magnetic-core materials and expected to contribute in miniaturization of electric parts in the near future.

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“…Recently developed, a spinning water atomization process (SWAP) for the production of powders has a higher cooling rate than the conventional gas/water atomization methods [16]. This technique is expected to produce amorphous powders of high Fe content (or B s ) alloys.…”

Section: Introductionmentioning

confidence: 99%

Production and Properties of Soft Magnetic Cores Made From Fe-Rich FeSiBPCu Powders

2015

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Fe-rich Fe 83.3 Si 4 B 8 P 4 Cu 0.7 powders with the particle sizes below 150 μm were prepared by spinning water atomization process. As-prepared powders were structurally amorphous. The powders with small and large particle size were insulated with the phenol resin and compacted to a toroidal shaped core (outer diameter ∼13, inner diameter ∼8, and height ∼5-6 mm) by cold-pressing at the pressure of ∼0.5-1.5 GPa. Core loss decreases, and magnetic permeability increases after annealing treatment at 350°C for 20 min. The powder particles in the annealed core consist of nanocrystalline α-Fe grains in the amorphous matrix. Cores exhibit a constant initial permeability (μ i ) up to the frequency range of ∼30 MHz. Core loss is shown to be dependent on particle size. Cores made from smaller powder particles have low core loss at high frequencies. Our powder cores exhibit lower core loss than the Somaloy500 powder cores measured under the magnetic induction of 0.5 T, and are promising for filling the gaps in high frequency and high induction application of ferrite materials.Index Terms-Core loss, nanocrystalline, powder core (PC), soft magnetic property, spinning water atomization process (SWAP). 0018-9464

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Magnetic Properties of Fe-Based Amorphous Powders With High-Saturation Induction Produced by Spinning Water Atomization Process (SWAP)

Cited by 55 publications

References 4 publications

Magnetic properties and vibration characteristics of amorphous alloy strip and its combination

Magnetic properties and vibration characteristics of amorphous alloy strip and its combination

Unusual high Bs for Fe-based amorphous powders produced by a gas-atomization technique

Production and Properties of Soft Magnetic Cores Made From Fe-Rich FeSiBPCu Powders

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