Influence of Coating Agent and Particle Size on the Soft Magnetic Properties of Fe Based Nano Crystalline Alloy Powder Core

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, μ[email protected] 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.

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Influence of mechanical alloying on the particle size, microstructure and soft magnetic properties of coarse Fe-based amorphous powders prepared by gas atomization

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2021.120675 ◽

2021 ◽

Vol 559 ◽

pp. 120675

Author(s):

Chaorun Si ◽

Ziqian Zhang ◽

Qi Zhang ◽

Jin Cai

Keyword(s):

Particle Size ◽

Magnetic Properties ◽

Mechanical Alloying ◽

Soft Magnetic Properties ◽

Gas Atomization ◽

Soft Magnetic ◽

Amorphous Powders

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Soft Magnetic Properties of Nanostructured Vitroperm Alloy Powder Cores

IEEE Transactions on Magnetics ◽

10.1109/tmag.2009.2033337 ◽

2010 ◽

Vol 46 (2) ◽

pp. 471-474 ◽

Cited By ~ 14

Author(s):

JÁn Fuzer ◽

Peter Kollar ◽

Jana Fuzerova ◽

Stefan Roth

Keyword(s):

Magnetic Properties ◽

Alloy Powder ◽

Soft Magnetic Properties ◽

Soft Magnetic

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Comparisons of Sintered Technology with Powder Forging for Fe-P Soft Magnetic Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.710.297 ◽

2012 ◽

Vol 710 ◽

pp. 297-302 ◽

Cited By ~ 3

Author(s):

Shailesh K. Chaurasia ◽

Ujjwal Prakash ◽

Kamlesh Chandra ◽

Prabhu S. Misra

Keyword(s):

Magnetic Properties ◽

Alloy Powder ◽

Soft Magnetic Properties ◽

Sintering Process ◽

Soft Magnetic ◽

Magnetic Alloys ◽

Soft Magnetic Alloys ◽

Final Density ◽

Hot Rolled ◽

Time And Energy

Sintered P/M ferrous compacts containing up to 0.8% phosphorous have attractive set of mechanical and magnetic properties. Large phosphorous additions increase the shrinkage during sintering to such a degree that the tolerances of the sintered component may become adversely affected. Further, the sintering process requires more time and energy and is hence costly. To overcome the above problems, powder forging route has been used. In this process encapsulated Fe- P based alloy powder is heated and forged it into slabs. These were hot rolled to produce sheet and wires. Phosphorous addition improves the final density of the resulting product. It also improves the soft magnetic properties. All the alloys exhibited excellent workability.

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