Direct synthesis of Fe-Si-B-C-Cu nanocrystalline alloys with superior soft magnetic properties and ductile by melt-spinning

Xingjie Jia ¹Bojun Zhang ²Wei Zhang ³Yaqiang Dong ⁴Jiawei Li ⁴Aina He ⁴Run-Wei Li⁴

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作者信息

1. Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,CAS Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China;Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China
2. Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,CAS Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China
3. Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China
4. Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,CAS Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China;University of Chinese Academy of Sciences,Beijing 100049,China
折叠

Abstract

Structure,magnetic properties and ductile of melt-spun Fe83-xSi4B13-yCyCux(x=0-1.7;y=0-8)alloys were investigated.The addition of 1.7 at.％Cu in a Fe83Si4B13 amorphous alloy generates abundant α-Fe crystals by providing nucleation sites,and further C doping promotes the growth of the crystals by suitable turning amorphous-forming ability,hence they increase saturation magnetic flux density(Bs)and slightly worse magnetic softness of the as-spun alloys.The as-spun Fe81.3Si4B7C6Cu1.7 alloy possesses a combined structure of a fully amorphous layer in wheel side surface and predominating nanocrystalline structure with gradually enlarged α-Fe crystal,whose average size and volume fraction are determined as about 12 nm and 32％,respectively,therefore superior soft magnetic properties and ductile with a high Bs of 1.74 T,coercivity(Hc)of 32.7 A/m,effective permeability(μe,at 1 kHz)of 3200 and high relatively strain at fracture(εf)of 3.61％can be achieved directly in this alloy by only using melt-spinning.The annealing at 578 K releases internal stress,promotes the growth of the α-Fe crystals and remains the amorphous layer of the Fe81.3Si4B7C6Cu1.7 alloy,then improves the soft magnetic properties and maintains the superior ductile with increasing the Bs and μe to 1.80 T and 14,100,respectively,lowering the Hc to 9.4 A/m and slightly reducing the εf to 2.39％.The combination of superior soft magnetic properties and ductile and simplified synthesis process entitles the Fe-Si-B-C-Cu nanocrystalline alloys great potentials in high performance electromagnetic applications.

Key words

Fe-based nanocrystalline alloys/High saturation magnetic flux density/Direct synthesis/Melt-spinning/Ductile

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基金项目

This work was financially supported by the National Key Re-search and Development Program of China(2016YFB0300500)

Youth Innovation Promotion Association CAS(2021294)

National Natural Science Foundation of China(51571047)

Ningbo Major Special Projects of the Plan"Science and Technology Innovation 2025"(2018B10084)

出版年

2022

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

参考文献量62

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