TY - JOUR
T1 - Fe-rich Fe-Si-B-P-Cu powder cores for high-frequency power electronic applications
AU - Zhang, Yan
AU - Sharma, Parmanand
AU - Makino, Akihiro
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - The Fe-rich Fe83.3Si4B8P4Cu0.7 magnetic powder with the particle size below 150 μm was obtained by spinning water atomization process. The as-prepared powder shows almost amorphous structure. The toroidal cores with outer diameter 13 mm and inner diameter 8 mm with height ∼ 4-6 mm were compacted and sintered at different temperature by spark plasma sintering technique under the maximum load of ∼ 800 MPa. High relative density (with respect to nanocrystalline ribbons of the same composition) up to ∼ 89% was obtained. The powder particles in the sintered core consist of nanocrystalline α Fe grains in the amorphous matrix. A constant initial permeability μi more than 50 was obtained up to the frequency range of 50 MHz. As expected, the permeability was found to increase with the increase in density of the core (maximum initial permeability of 364). Low magnetic coercivity Hc can be obtained in these cores, closed to ∼ 80 A/m. Lowcore loss W is due to reduced eddy-current loss (at high frequencies), resulting from the electrical insulation of the powder particles by resin. Our soft magnetic powder cores (PCs) exhibit lower core loss than the Somaloy PCs measured under a relatively high magnetic induction, e.g., 0.5 and 1 T, which may fill the gaps in high-frequency high induction application of ferrite materials.
AB - The Fe-rich Fe83.3Si4B8P4Cu0.7 magnetic powder with the particle size below 150 μm was obtained by spinning water atomization process. The as-prepared powder shows almost amorphous structure. The toroidal cores with outer diameter 13 mm and inner diameter 8 mm with height ∼ 4-6 mm were compacted and sintered at different temperature by spark plasma sintering technique under the maximum load of ∼ 800 MPa. High relative density (with respect to nanocrystalline ribbons of the same composition) up to ∼ 89% was obtained. The powder particles in the sintered core consist of nanocrystalline α Fe grains in the amorphous matrix. A constant initial permeability μi more than 50 was obtained up to the frequency range of 50 MHz. As expected, the permeability was found to increase with the increase in density of the core (maximum initial permeability of 364). Low magnetic coercivity Hc can be obtained in these cores, closed to ∼ 80 A/m. Lowcore loss W is due to reduced eddy-current loss (at high frequencies), resulting from the electrical insulation of the powder particles by resin. Our soft magnetic powder cores (PCs) exhibit lower core loss than the Somaloy PCs measured under a relatively high magnetic induction, e.g., 0.5 and 1 T, which may fill the gaps in high-frequency high induction application of ferrite materials.
KW - Core loss
KW - nanocrystalline
KW - powder core (PC)
KW - soft magnetic property
KW - spark plasma sintering (SPS)
KW - spinning water atomization process (SWAP)
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U2 - 10.1109/TMAG.2014.2316543
DO - 10.1109/TMAG.2014.2316543
M3 - Article
AN - SCOPUS:84915749282
VL - 50
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
SN - 0018-9464
IS - 11
M1 - 6971603
ER -