Design of FeSiBPCu soft magnetic alloys with good amorphous forming ability and ultra-wide crystallization window  

作　　者：Xingdu Fan Tao Zhang Weiming Yang Junhua Luan Zengbao Jiao Hui Li 

机构地区：[1]Jiangsu Key Laboratory for Advanced Metallic Materials,School of Materials Science and Engineering,Southeast University,Nanjing 211189,China [2]Institute of Massive Amorphous Metal Science,China University of Mining and Technology,Xuzhou 221116,China [3]Center for Advanced Structural Materials,Department of Mechanical and Biomedical Engineering,College of Science and Engineering,City University of Hong Kong,Kowloon,Hong Kong,China [4]Department of Mechanical Engineering,The Hong Kong Polytechnic University,Hong Kong,China [5]School of Materials Science and Engineering,Shanghai University,Shanghai 200444,China

出　　处：《Journal of Materials Science & Technology》2023年第16期124-131,共8页材料科学技术（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51871237);the Natural Science Foundation of Jiangsu Province(No.BK20201282);Atom probe tomography research was conducted at the Inter-University 3D Atom Probe Tomography Unit of City University of Hong Kong supported by the CityU(No.9360161).

摘　　要：The Fe_(81.3)Si_(4)B_(13–x)PxCu_(1.7) soft magnetic alloys with high Cu and proper P elements addition were synthesized with the aim of ensuring the amorphous forming ability(AFA)while expanding the crystallization window(CW).It is found that the atomic ratio of P/Cu of∼3 is advantageous for AFA whereas a small amount of P addition promotes the precipitation ofα-Fe grains and excessive P addition induces surface crystallization behavior of the present alloys.High Cu concentration can expand the annealing temperature(Ta)window whereas proper P addition effectively expands the annealing time(ta)window.The Fe_(81.3)Si_(4)B_(13-x)PxCu_(1.7) soft magnetic alloy was successfully synthesized with a large Ta window of up to 130°C and ta window of 90 min,which is a breakthrough for nanocrystalline alloys with high saturation magnetization.Microstructure analysis reveals that the ultra-wide CW is related to the unique nucleation mechanism,that is,theα-Fe grains are precipitated attaching to the Cu or CuP clusters and enveloping the Cu clusters,resulting in the high number density ofα-Fe nanocrystals.The ultra-wide CW promises the potential material in flexibly choosing the annealing process according to the performance.

关 键 词：Nanocrystalline alloys Amorphous forming ability Crystallization window Soft magnetic properties 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TG156.2[金属学及工艺—合金]