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Effects of ribbon thickness on Structure and Soft Magnetic Properties of a High-Cu-Content FeBCuNb Nanocrystalline Alloy

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Acta Metallurgica Sinica(English Letters) 2022年第2期35卷 235-242页

作者： Li-Cheng Wu Yan-Hui Li Xing-Jie Jia Ai-Na He Wei Zhang Key Laboratory of Materials Modification by Laser Ionand Electron Beams(Ministry of Education)School of Materials Science and EngineeringDalian University of TechnologyDalian 116024China Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology CAS Key Laboratory of Magnetic Materials and DevicesNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China

The effects of ribbon thickness(t)on the structure and magnetic properties of a Fe_(82.3)B_(13)Cu_(1.7)Nb_(3) alloy in melt-spun and annealed states have been *** the t from 15 to 23μm changes the structure of the melt-spun ribbons from a single amorphous phase to a composite with denseα-Fe nanograins embedded in the amorphous *** grain size(D_(α-Fe))of theα-Fe near the free surface of the ribbon is about 6.7 nm,and it gradually decreases along the cross section toward the wheel-contacted *** increasing the t to 32μm coarsens the D_(α-Fe) near the free surface to 15.2 nm and aggravates the D_(α-Fe) ramp along the cross *** annealing,the ribbon with t=15μm has relatively largeα-Fe grains with D_(α-Fe)>30 nm,while the thicker ribbons possessing the pre-existing nanograins form a finer nanostructure with D_(α-Fe)ribbon with t=23μm is better than that of the ribbon with t=32μ*** annealed ribbons with t=23 and 32μm possess superior soft magnetic properties to the ribbon with t=15μ*** ribbon with t=23μm exhibits a high saturation magnetic flux density of 1.68 T,low coercivity of 9.6 A/m,and high effective permeability at 1 kHz of 15,*** ribbon with t=32μm has a slightly larger coercivity due to the lower structural *** formation mechanism of the fine nanostructure for the ribbons with suitable t has been discussed in terms of the competitive growth effect among the pre-existingα-Fe nanograins.

关键词： Fe-based nanocrystalline alloy Microstructure Pre-existingα-Fe nanograin Soft magnetic properties ribbon thickness

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Core loss analysis of Finemet type nanocrystalline alloy ribbon with different thickness

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Progress in Natural Science:Materials International 2017年第5期27卷 588-592页

作者： Zhun Li Kefu Yao Deren Li Xiaojun Ni Zhichao Lu School of Material Science and Engineering Tsinghua University China Iron & Steel Research Institute Group Advanced Technology and Materials Co.Ltd.

Nanocrystalline soft magnetic materials are widely used in power electronic applications due to their high permeability,magnetization and low core *** this paper,Fe;Cu;Nb;Si;B;（at%）nanocrystalline alloy ribbons,with ultra-thin thickness of 14μm,and also 18 and 22μm,were prepared by a planar flow casting method with a single roller *** magnetic properties of these ribbons were analyzed after nanocrystallization *** experiments were conducted on toroidal samples using IWATSU B-H Analyzer over a frequency range of 10–100 kHz,at induction amplitudes of 100–500 m T,at room *** was found that the excess eddy current loss P;was the dominant factor in the overall core loss above 10 k *** toroidal samples made of the 14μm thickness ribbon exhibit very low total core loss of 48 W/kg at a frequency of100 kHz and magnetic flux density of 300 *** ratio of the P;was up to 89%at 100 *** ribbon with lower thickness exhibits lower P;and therefore lower total core *** domain structure evidences were *** indicates that the ribbons with small thickness are preferable for application in high frequency condition.

关键词： Nanocrystalline ribbon thickness Core loss Domain structure

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