Heterostructured crystallization mechanism and its effect on enlarging the processing window of Fe-based nanocrystalline alloys

Tao Liu ¹Aina He ²Fengyu Kong ³Anding Wang ³Yaqiang Dong ²Hua Zhang ⁴Xinmin Wang ²Hongwei Ni ⁴Yong Yang³

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作者信息

1. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China;CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China;Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430
2. CAS Key Laboratory of Magnetic Materials and Devices, Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China
3. Department of Materials Science and Engineering, College of Engineering, City University of Hong Kong, Kowloon Tong, Kowloon, Hong Kong Special Administrative Region, China
4. The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, China;Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, China
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Abstract

The harsh melt-spinning and annealing processes of high saturation magnetization nanocrystalline soft-magnetic alloys are the biggest obstacles for their industrialization.Here,we proposed a novel strategy to enlarge the processing window by annealing the partially crystallized precursor ribbons via a heterostructured crystallization process.The heterostructured evolution of Fe84.75Si2B9P3C0.5Cu0.75 (at.％)alloy ribbons with different spinning rate were studied in detail,to demonstrate the gradient nucleation and grain refinement mechanisms.The nanocrystalline alloys made with industrially acceptable spinning rate of 25-30 m/s and normal annealing process exhibit excellent magnetic properties and fine nanostructure.The small quenched-in crystals/clusters in the free surface of the low spinning rate ribbons will not grow to coarse grains,because of the competitive grain growth and shielding effect of metalloid elements rich interlayer with a high stability.Avoiding the precipitation of quenched-in coarse grains in precursor ribbons is thus a new criterion for the composition and process design,which is more convenient than the former one with respect to the homogenous crystallization mechanism,and enable us to produce high performance nanocrystalline soft-magnetic alloys.This strategy is also suitable for improving the compositional adjustability,impurity tolerance,and enlarging the window of melt temperature,which is an important reference for the future development of composition and process.

Key words

Nanocrystalline alloy/Processing window/Surface crystallization/Soft-magnetic property/Heterostructured crystallization

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基金项目

National Key Research and Development Program of China(2016YFB0300501)

国家自然科学基金(51771159)

国家自然科学基金(51774217)

国家自然科学基金(51801224)

国家自然科学基金(51971186)

浙江省自然科学基金(LQ18E010006)

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

financial support from general research fund (GRF)()

Hong Kong Government,through the general research fund (GRF)(CityU11200719)

Hong Kong Government,through the general research fund (GRF)(CityU11213118)

Hong Kong Government,through the general research fund (GRF)(CityU11209317)

出版年

2021

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38

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