ACTA

Effect of Silicon Substitution for Boron on Structural and Magnetic Properties of Melt-Spun Fe_79.3Co₂Cu_0.5Mo_0.2Si_xB_18-x (x=5-9) Alloys

M. Polak, L. Hawelek, A. Radon, P. Wlodarczyk, P.Zackiewicz, A.^{Kolano-Burian}
Łukasiewicz Research Network - Institute of Non-Ferrous Metals, Sowinskiego 5, Gliwice, Poland

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The effect of Si substitution for B on the structural and magnetic properties (i.e. magnetic saturation B_max, magnetic remanence B_r, coercivity H_c, core power losses P_s) of melt-spun Fe_79.3Co₂Cu_0.5Mo_0.2Si_xB_18-x, alloys (where x=5-9) has been investigated. The effect of heat treatment was also examined. The optimal parameters were obtained for the composition Fe_79.3Co₂Cu_0.5Mo_0.2Si₅B₁₃ after heat treatment at 355° for 20 min. Hence, they are: B_max=1.56 T, B_r=0.46 T, H_c=12.1 A/m, P_s=0.62 W/kg at f=50 Hz, and magnetic field equals to 1007 A/m. Results from X-ray diffraction showed that each of the studied compositions was partially crystallized on the surface. However, for the compositions with silicon content x=8 and x=9 partial volumetric crystallization was also observed. Presence of the Fe₂B phase in the investigated alloys suppresses soft magnetic properties.

DOI:10.12693/APhysPolA.137.882
topics: soft magnetic materials, metallic glass, magnetic properties