Effect of surface crystallization on magnetic properties of Fe 82 Cu 1 Si 4 B 11.5 Nb 1.5 nanocrystalline alloy ribbons

In the current study magnetic, magneto-optical, and morphologic and structural properties of the amorphous Fe 82 Cu 1 Nb 3.5 Si 5.5 B 8 (NC1) and Fe 77.5 Cu 1.5 Nb 5 Si 7 B 9 (NC2) alloys were investigated at elevated temperatures with and without tensile loading. Kinetic nanocrystallization temperatures of certain ribbons were properly determined at the range of 500°C to 555°C. Furthermore, an unusual method was preferred to identify the tensile loading conditions regarding relative permeability values in the as-cast (AC) state to specify stress annealing conditions. The present properties yielded an ultrafine-grain structure correlated with the literature results. AC-state, tensile-loaded, heat-treated, and stress-annealed specimens were separately examined to ensure their improvement in terms of magnetic properties and structures as well as magnetic domains. Besides, variations of induced anisotropy with respect to tensile loading and coercivity made the evaluation of the magnetic microstructures possible. In addition, the observed magnetic domains contribute further knowledge to the available magnetic microstructures. Good correlation between the determined magnetic properties and observed microstructures was found. Eventually, the optimum nanocrystallization requirements of NC1 and NC2 could be determined as 70 MPa + 535°C and 120 MPa + 555°C, respectively. Such requirements lead to achieving transverse induced anisotropy, which also allows forming periodic alignment of transverse domains.

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Effect of surface crystallization on magnetic properties of Fe 82 Cu 1 Si 4 B 11.5 Nb 1.5 nanocrystalline alloy ribbons

Cited by 28 publications

References 28 publications

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Industrialization of a FeSiBNbCu nanocrystalline alloy with high Bs of 1.39 T and outstanding soft magnetic properties

Improving the Bs and soft magnetic properties of Fe-based amorphous ribbons by manipulating the surface crystallization behavior

Magneto-mechanical Effect on the Magnetic Properties and Microstructures in Nanocrystalline Fe-Cu-Nb-Si-B Alloys

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