首页|Microstructure evolution, magnetic properties and frequency characteristics of Si-rich FeSiBCuNb soft magnetic alloy induced by annealing treatment
Microstructure evolution, magnetic properties and frequency characteristics of Si-rich FeSiBCuNb soft magnetic alloy induced by annealing treatment
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NSTL
Elsevier
? 2022 Elsevier Inc.The influences of heat treatment on the microstructure, domain structure and magnetic characteristics of the Fe73.5Si15.5B7Cu1Nb3 alloy were investigated. We demonstrated that the as-spun alloy exhibits high amorphous forming ability and good thermal stability with a large annealing interval between the primary and secondary crystallization peaks over 170 °C. Also, the interaction of chemical concentration fluctuations and heterogeneous nucleation is responsible for the nanocrystallization mechanism of alloy. Furthermore, the magnetic structures change from the narrow and zigzag-like branched domains to wide and regular striped domains with increasing annealing temperature, which leads to a decrease in pinning effects. Appropriate magnetic anisotropy introduced by heat-treatment process has effect on the magnetic mechanism and the shape of magnetic hysteresis loops, which adjusts the frequency characteristics. After the optimum annealing, the alloy exhibits the excellent magnetic properties including high Ms. of 135.4 emu/g and low Hc of 0.56 A/m, together with good low-frequency characteristics.
Annealing treatmentFe-based nanocrystalline alloyMagnetic domainMicrostructure evolutionSoft magnetic property
Liu Z.、Xu J.、Wang Y.、Liu Y.
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School of Materials Science and Engineering South China University of Technology
Institute of New Materials Guangdong Academy of Sciences
NSTL
Elsevier
