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Thermal stability, crystallization, and magnetic properties of FeNiBCuNb alloys |
Zhe Chen(陈哲)1, Qian-Ke Zhu(朱乾科)1, Shu-Ling Zhang(张树玲)2, Ke-Wei Zhang(张克维)1, Yong Jiang(姜勇)1 |
1 School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China; 2 School of Material of Science and Engineering, North Minzu University, Yinchuan 750021, China |
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Abstract Amorphous (Fe40Ni40B19Cu1)100-xNbx (x=1, 3, 5, 7) ribbons are prepared by using the melt-spinning method. We find that the glass forming ability (GFA) of the as-melt spun ribbons is significantly improved by adding Nb element. In addition, the thermal stability evaluated in steps of ΔT=Tx2-Tx1 effectively increases from 16 K to 75 K with Nb content increasing. The as-melt spun (Fe40Ni40B19Cu1)97Nb3 ribbon exhibits a lowest coercivity of 2 A/m and relatively large saturation magnetization of 103.7 A·m2/kg and thus it can be further treated by being annealed at 809 K. The crystallization behavior is confirmed to be determined by two individual crystallization processes corresponding to the precipitation of (Fe,Ni)23B6 phase and γ-(Fe,Ni) phase. With increasing annealing time, the single (Fe,Ni)23B6 phase can be transformed into a mixture of (Fe,Ni)23B6 and γ-(Fe,Ni) phase, and the grain size of γ-(Fe, Ni) phase increases from 5 nm to 80 nm while the grain size of (Fe,Ni)23B6 remains almost unchanged. Finally, we find that the grain growth in each of (Fe,Ni)23B6 and γ-(Fe, Ni) deteriorates the overall magnetic properties.
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Received: 27 March 2019
Revised: 22 May 2019
Accepted manuscript online:
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PACS:
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75.50.Kj
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(Amorphous and quasicrystalline magnetic materials)
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75.47.Np
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(Metals and alloys)
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75.75.-c
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(Magnetic properties of nanostructures)
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75.60.Nt
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(Magnetic annealing and temperature-hysteresis effects)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51731003), the Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi Province, China (2014), the “131” Leading Talents Project of Higher Education Institutions in Shanxi Province, China (2015), the Overseas Students Science and Technology Activities Project Merit Funding, China (2016), and the Fund for Shanxi Key Subjects Construction. |
Corresponding Authors:
Ke-Wei Zhang
E-mail: drzkw@126.com
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Cite this article:
Zhe Chen(陈哲), Qian-Ke Zhu(朱乾科), Shu-Ling Zhang(张树玲), Ke-Wei Zhang(张克维), Yong Jiang(姜勇) Thermal stability, crystallization, and magnetic properties of FeNiBCuNb alloys 2019 Chin. Phys. B 28 087502
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