The Structure and Magnetic Properties of Rapidly Quenched Fe72Ni8Nb4Si2B14 Alloy

Materials

Wojciech Maziarz¹  Anna Wojcik¹  Marcin Polak²  Patryk Wlodarczyk²  Przemyslaw Zackiewicz²  Lukasz Hawelek²  Magdalena Steczkowska-Kempka²  Tymon Warski²  Aleksandra Kolano-Burian² 

[1] Institute of Metallurgy and Materials Science, Polish Academy of Sciences, 25 Reymonta str., 30-059 Krakow, Poland;Lukasiewicz Research Network—Institute of Non-Ferrous Metals, 5 Sowinskiego str., 44-100 Gliwice, Poland;

关键词: soft magnetic materials;    metallic glass;    crystallization;    magnetic properties;   

DOI  :  10.3390/ma14010005

来源: DOAJ

【 摘 要 】

The complex structural and magnetic studies of the annealed rapidly quenched Cu-free Fe₇₂Ni₈Nb₄Si₂B₁₄ alloy (metallic ribbons form) are reported here. Based on the calorimetric results, the conventional heat treatment process (with heating rate 10 °C/min and subsequent isothermal annealing for 20 min) for wound toroidal cores has been optimized to obtain the least lossy magnetic properties (for the minimum value of coercivity and magnetic core losses at 50 Hz). For optimal conditions, the complex permeability in the 10⁴–10⁸ Hz frequency range together with core power losses obtained from magnetic induction dependence up to the frequency of 400 kHz was successfully measured. The average and local crystal structure was investigated by the use of the X-ray diffraction method and the transmission electron microscopy observations and proved its fully glassy state. Additionally, for the three temperature values, i.e., 310, 340 and 370 °C, the glass relaxation process study in the function of annealing time was carried out to obtain a deeper insight into the soft magnetic properties: magnetic permeability and cut-off frequency. For this type of Cu-free soft magnetic materials, the control of glass relaxation process (time and temperature) is extremely important to obtain proper magnetic properties.

【 授权许可】

Unknown