Ángel Sota Muñoz , Nerea Burgos , Valentina Zhukova , Ahmed Talaat , Julián González , Mikel Osinalde , Jose Manuel Martín
{"title":"Study of amorphous powder cores with increased magnetic saturation and permeability","authors":"Ángel Sota Muñoz , Nerea Burgos , Valentina Zhukova , Ahmed Talaat , Julián González , Mikel Osinalde , Jose Manuel Martín","doi":"10.1016/j.powtec.2025.120847","DOIUrl":null,"url":null,"abstract":"<div><div>Soft magnetic composites (SMCs) made of amorphous powder typically result in low densities due to the brittleness of the amorphous, thereby providing poor magnetic properties. For this reason, this work focuses on mixing the particle sizes of amorphous powders to increase the packing, and therefore the compact density and magnetic properties. Enhanced packing density is obtained by mixing particle size fractions of 20–45 μm and 0–10 μm in a proportion of 73:27 vol%, respectively. Properties of the SMC made from the mixed fractions are compared with those made from each fraction using an Fe-Co composition ((Fe<sub>0.425</sub> Co<sub>0.30</sub> Si<sub>0.125</sub> B<sub>0.15</sub>)<sub>96.5</sub>Nb<sub>3</sub>Cu<sub>0.5</sub>). The mixing of fractions shows an increase of 10 % in density, thus reducing interparticle voids and enhancing magnetic saturation and permeability. By contrast, lower power losses are provided by the SMC fabricated with the 0–10 μm fraction due to lower eddy currents. A comparative study on magnetic properties and power losses of SMCs made from the mixed fractions for four compositions reveal that highest permeability (μ’ = 34.5) is achieved with composition (Fe<sub>0.46</sub> Co<sub>0.30</sub> Si<sub>0.09</sub> B<sub>0.10</sub> P<sub>0.05</sub>)<sub>96.5</sub>Nb<sub>3</sub>Cu<sub>0.5</sub> and lowest power losses at high frequency (3437 mW/cm<sup>3</sup> at 1 MHz and B = 50 mT) with Fe<sub>72.5</sub> Si<sub>12.5</sub> B<sub>15</sub> after annealing and subsequent resin infiltration.</div></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":"456 ","pages":"Article 120847"},"PeriodicalIF":4.6000,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0032591025002426","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/2/27 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Soft magnetic composites (SMCs) made of amorphous powder typically result in low densities due to the brittleness of the amorphous, thereby providing poor magnetic properties. For this reason, this work focuses on mixing the particle sizes of amorphous powders to increase the packing, and therefore the compact density and magnetic properties. Enhanced packing density is obtained by mixing particle size fractions of 20–45 μm and 0–10 μm in a proportion of 73:27 vol%, respectively. Properties of the SMC made from the mixed fractions are compared with those made from each fraction using an Fe-Co composition ((Fe0.425 Co0.30 Si0.125 B0.15)96.5Nb3Cu0.5). The mixing of fractions shows an increase of 10 % in density, thus reducing interparticle voids and enhancing magnetic saturation and permeability. By contrast, lower power losses are provided by the SMC fabricated with the 0–10 μm fraction due to lower eddy currents. A comparative study on magnetic properties and power losses of SMCs made from the mixed fractions for four compositions reveal that highest permeability (μ’ = 34.5) is achieved with composition (Fe0.46 Co0.30 Si0.09 B0.10 P0.05)96.5Nb3Cu0.5 and lowest power losses at high frequency (3437 mW/cm3 at 1 MHz and B = 50 mT) with Fe72.5 Si12.5 B15 after annealing and subsequent resin infiltration.
期刊介绍：
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.
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