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The Influence of Structural State on the Coercivity of Fe72Si16B7Cu1Nb4 Nanocrystalline Alloys.

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Bibliographic Details
Title:	The Influence of Structural State on the Coercivity of Fe72Si16B7Cu1Nb4 Nanocrystalline Alloys.
Authors:	Shao, Jiashao¹ (AUTHOR), Gu, Wenju² (AUTHOR), Li, Li² (AUTHOR), Yao, Xiucong² (AUTHOR), Geng, Yanfei¹ (AUTHOR), Chen, Xizhang¹ (AUTHOR) chenxizhang@wzu.edu.cn
Source:	Journal of Materials Engineering & Performance. Feb2026, Vol. 35 Issue 4, p3081-3091. 11p.
Subjects:	Coercive fields (Electronics), Magnetic properties, Nanocrystals, Recrystallization (Metallurgy), Solid state chemistry, Melt spinning, Soft magnetic materials, Magnetic cores
Abstract:	This study successfully fabricated the Fe72Si16B7Cu1Nb4 iron-based amorphous alloy via melt-spinning and systematically investigated structural relaxation, magnetic domain structure evolution, and their impact on coercivity through precisely controlled multi-step annealing at primary annealing temperatures (510 , 520 , 530 , and 540 °C). The results reveal that as the annealing temperature increased from 510 °C to 540 °C, the volume fraction of the crystalline phase significantly increased from 59.53 to 71.43%, while the thickness of the residual amorphous layer decreased noticeably from 1.987 to 1.673 nm. Furthermore, the annealing treatment led to a substantial enhancement in the alloy's saturation magnetic induction from 0.597 to 1.120 T, and a dramatic reduction in coercivity from 15.623 to 0.298 A/m. This research elucidates the critical role of enhanced atomic mobility, atomic rearrangement, and elimination of free volume in optimizing the magnetic domain structure and improving soft magnetic properties. This study provides valuable guidance for the design of high-sensitivity magnetic cores in power electronics, such as residual current protection devices, by optimizing coercivity through controlled annealing. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	This study successfully fabricated the Fe72Si16B7Cu1Nb4 iron-based amorphous alloy via melt-spinning and systematically investigated structural relaxation, magnetic domain structure evolution, and their impact on coercivity through precisely controlled multi-step annealing at primary annealing temperatures (510 , 520 , 530 , and 540 °C). The results reveal that as the annealing temperature increased from 510 °C to 540 °C, the volume fraction of the crystalline phase significantly increased from 59.53 to 71.43%, while the thickness of the residual amorphous layer decreased noticeably from 1.987 to 1.673 nm. Furthermore, the annealing treatment led to a substantial enhancement in the alloy's saturation magnetic induction from 0.597 to 1.120 T, and a dramatic reduction in coercivity from 15.623 to 0.298 A/m. This research elucidates the critical role of enhanced atomic mobility, atomic rearrangement, and elimination of free volume in optimizing the magnetic domain structure and improving soft magnetic properties. This study provides valuable guidance for the design of high-sensitivity magnetic cores in power electronics, such as residual current protection devices, by optimizing coercivity through controlled annealing. [ABSTRACT FROM AUTHOR]
ISSN:	10599495
DOI:	10.1007/s11665-025-11827-w