Melt-spun Fe-Co-P-B metglas: structure, crystallization kinetics, magnetic properties

18th International Conference PhysicA.SPb

Prahova, D.A.^1 ; Grishin, A.M.^1,2 ; Ignahin, V.S.^1 ; Lugovskaya, L.A.^1 ; Osaulenko, R.N.^1

Petrozavodsk State University, Petrozavodsk

185000, Russia^1

INMATECH Intelligent Materials Technology, Skärholmen

SE-127 51, Sweden^2

关键词: Amorphous structures;    Coercive field;    Crystalline state;    Crystallization temperature;    Isothermal regime;    Johnson-mehl-avrami;    Rapidly solidified;    Soft magnetic properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/769/1/012034/pdf
DOI  :  10.1088/1742-6596/769/1/012034

来源: IOP

【 摘 要 】

Crystallization kinetics and magnetic properties were studied in series of rapidly solidified metallic glasses Fe80-ξCoξP14B6with ξ = 25, 32, 35 and 40 at. %. Differential scanning calorimetry (DSC) was employed to determine crystallization temperature and to demonstrate the incubation phenomenon at isothermal annealing. Fitting DSC traces recorded in non-isothermal and isothermal regimes, we obtained the same activation energy Q. It describes atomic transfer across crystal/amorphous interface in Kolmogorov-Johnson-Mehl- Avrami (KJMA) model of the transition of metallic glasses into crystalline state. As-quenched metglas ribbons have amorphous structure and superior soft magnetic properties: coercive field 4 A/m, ac magnetic permeability as high as 110 000 at 60 Hz.