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

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

机构地区：[1]Key Laboratory of Aerospace Materials and Performance(Ministry of Education),School of Materials Science and Engineering,Beihang University,Beijing 100191,China [2]Laboratory of Functional Fiber Materials,Institute of Bast Fiber Crops,Chinese Academy of Agricultural Science,Changsha 410205,China [3]School of Materials Science and Engineering,Jiangsu Key Laboratory for Advanced Metallic Materials,Southeast University,Nanjing 211189,China [4]Institute for Advanced Materials,North China Electric Power University,Beijing 102206,China [5]Center for Advanced Analysis and Computational Science,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Rare Metals》2024年第10期5242-5255,共14页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.51971006);the Chinese Agricultural Science and Technology Innovation Project(No.ASTIP-IBFC-05)。

摘　　要：In Fe-based amorphous-/nanocrystalline ribbons,the uniformization and refinement of a-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 a-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 a-Fe nanocrystals,which is separately induced by the decomposition of the Au-P clusters and the pre-existing a-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 a-Fe nanocrystals.Furthermore,i introduces a new principle for optimizing the comprehensive properties of Fe-based amorphous/nanocrystalline alloys.

关 键 词：Fe-based nanocrystalline alloys Soft magnetic property In-situ nano-crystallization MICROALLOYING 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TB383.1[金属学及工艺—合金]