Decomposition of pre-existing Au-P clusters induced in situ α-Fe grains uniformization in Fe-P-based nanocrystalline alloys

文献类型： 外文期刊

第一作者： Han, Min-Hao

作者： Han, Min-Hao;Sun, Cheng;Meng, Yang;Yu, Xue-Qian;Zhang, Wen-Feng;Liu, Hao;Zhang, Tao;Xi, Guo-Guo;Luo, Qiang;Xu, Hong-Jie;Zhang, Tao

作者机构：

关键词： Fe-based nanocrystalline alloys; Soft magnetic property; In-situ nano-crystallization; Micro-alloying

期刊名称：RARE METALS （ 影响因子：9.6； 五年影响因子：6.9 ）

ISSN： 1001-0521

年卷期： 2024 年

页码：

收录情况： SCI

摘要： In Fe-based amorphous-/nanocrystalline ribbons, the uniformization and refinement of alpha-Fe grains are key aspects for optimizing their soft magnetic and mechanical properties. Herein, the Fe-P-C-B nanocrystalline alloy system was selected for investigation. We produced as-spun ribbons with pre-existing nanocrystals through melt-quenching and then obtained a well-distributed alpha-Fe nanocrystalline structure through annealing below the first crystallization onset temperature (633 K), resulting in excellent magnetic properties (saturation magnetization of 1.65 T and coercivity of 1.6 A.m(-1)), ultra-wide annealing temperature window (from 613 to 733 K), and extremely high annealing stability (up to 480 min at 633 K). Furthermore, we propose a new in situ two-step mechanism for the uniformization of alpha-Fe nanocrystals, which is separately induced by the decomposition of the Au-P clusters and the pre-existing alpha-Fe nanocrystals during annealing. This work underscores the crucial significance of micro-alloying via metastable clusters primarily influenced by metal-phosphide interactions in the process of refining alpha-Fe nanocrystals. Furthermore, it introduces a new principle for optimizing the comprehensive properties of Fe-based amorphous/nanocrystalline alloys.

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