Influence rules of early transition elements on rapid solidified structure and nanocrystallization behaviors of Fe-Si-B-Cu soft magnetic alloys with high Cu content  

作　　者：Xingjie Jia Yaqiang Dong Wei Zhang Ling Zhang Yanqiu Li Aina He Jiawei Li Wenjun Wang Baogen Shen 

机构地区：[1]Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology,CAS Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Materials Technology&Engineering,Chinese Academy of Sciences,Ningbo 315201,China [2]Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Niobium Product Department,CITIC Metal Company Limited,Beijing 100004,China

出　　处：《Journal of Materials Science & Technology》2024年第17期157-166,共10页材料科学技术（英文版）

基　　金：supported by the National Key R&D Program of China(No.2021YFB3803004);the National Natural Science Foundation of China(Nos.52101239 and 52171153);Ningbo Natural Science Foundation(No.2021J222);the“Pioneer”R&D Program of Zhejiang Province(No.2023C01075);Youth Innovation Promotion Association CAS(No.2021294);Zhejiang Provincial Key Research and Development Projects(No.2021C01033);CITIC Group Major Science and Technology Innovation Project(HT-FZB-2022190).

摘　　要：Unique rapid solidified structure and nanocrystallization mechanism enable the Fe-based nanocrystalline alloys with high Cu content excellent soft magnetic properties and good manufacturability,and also results in unusual phenomena in terms of alloying effects.In the present work,we systematically studied the influence rules of early transition elements on the rapid solidified structure and nanocrystallization behaviors of Fe-Si-B-Cu soft magnetic alloys with high Cu content and explored the related mechanisms.In terms of rapid solidified structure,the additions of early transition elements always inhibit the for-mation of pre-existingα-Fe crystals even eliminate them,and the additions that could produce larger atomic mismatch parameter(δ)and negative mixing enthalpy(△H_(mix))show stronger effects.In terms of nanocrystallization behaviors,the increases inδand negative△H_(mix) weaken the competitive growth between the pre-existing nanocrystals during annealing and then coarsen the nanostructure of the an-nealed alloys and deteriorate their magnetic softness,while the excessive increases inδand negativeHmix could significantly suppress the growth ofα-Fe crystals by diffusion inhibition during annealing and thus remarkable refine the nanostructure of the annealed alloys and improve their magnetic softness.

关 键 词：Nanocrystalline soft magnetic alloys Early transition elements Rapid solidified structure Nanocrystallization behaviors Pre-existingα-Fe crystals 

分 类 号：TG132[一般工业技术—材料科学与工程] TB383.1[金属学及工艺—合金]