结晶动力学指导下FeSiBPCu合金软磁性能定制退火条件优化

IF 6.3 2区 材料科学 Q2 CHEMISTRY, PHYSICAL
Shujie Kang, Zhe Chen, Qianke Zhu, Zhijie Yan, Kewei Zhang
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引用次数: 0

摘要

结晶动力学的研究旨在揭示材料从非晶态或液态向结晶态转变过程中微观结构的演化规律和动力学机制。因此,本研究采用基于结晶动力学的XRD、DSC和TEM表征方法研究了FeSiBPCu合金的相变行为、显微组织和软磁性能之间的关系。研究表明,在非等温结晶过程中,随着温度升高速率的增加,结晶峰向更高的温度移动。通过计算α-Fe(Si)相的成核活化能和生长活化能,发现α-Fe(Si)相的热稳定性较好。合金的结晶机制由扩散控制的初始一维生长到最终复杂的三维生长。合金的成核活化能En和晶粒长大活化能Eg分别为293.89 kJ/mol和261.88 kJ/mol,表明合金在等温结晶过程中的成核过程比晶粒长大更困难。此外,基于结晶动力学的热处理条件优化得到了结晶体积分数高的纳米晶合金(D = 36.3 nm, Nd = 2.54×1022 m-3),软磁性能显著改善(Bs = 1.69±0.02 T, Hc = 9.5±0.8 A/m, μe = 11220±300),验证了结晶动力学对性能优化的指导意义。本研究为深入了解结晶动力学和优化材料性能提供了重要的理论依据和实验参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Crystallization kinetics-guided optimization of annealing conditions for tailoring soft magnetic properties in FeSiBPCu alloys

Crystallization kinetics-guided optimization of annealing conditions for tailoring soft magnetic properties in FeSiBPCu alloys
The study of crystallization kinetics aims to reveal the evolution regulations and kinetic mechanisms of the microstructures of materials during the transition from the amorphous or liquid state to the crystalline state. Therefore, in this study, the correlation between phase transition behavior, microstructure, and soft magnetic properties of FeSiBPCu alloys was investigated by XRD, DSC, and TEM characterization based on crystallization kinetics. It has been demonstrated that during non-isothermal crystallization, the crystallization peaks move to higher temperatures as the rate of temperature rise increases. The thermal stability of the α-Fe(Si) phase is found to be better by calculating the nucleation activation energy and growth activation energy. The crystallization mechanism of the alloy ranges from diffusion-controlled initial one-dimensional growth to final complex three-dimensional growth. The activation energies En for nucleation and Eg for grain growth of the alloy are 293.89 kJ/mol and 261.88 kJ/mol, respectively, indicating that the nucleation process of the alloy during isothermal crystallization is more difficult than grain growth. Moreover, optimization of heat treatment conditions based on crystallization kinetics resulted in nanocrystalline alloys (D = 36.3 nm, Nd = 2.54×1022 m-3) with high crystallization volume fraction and significantly improved soft magnetic properties (Bs = 1.69 ± 0.02 T, Hc = 9.5 ± 0.8 A/m, μe = 11220 ± 300), which verified the significance of the crystallization kinetics as a guide for the optimization of properties. This study provides an important theoretical basis and experimental reference for a deeper understanding of crystallization kinetics and optimization of material properties.
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来源期刊
Journal of Alloys and Compounds
Journal of Alloys and Compounds 工程技术-材料科学:综合
CiteScore
11.10
自引率
14.50%
发文量
5146
审稿时长
67 days
期刊介绍: The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.
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