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Effects of Annealing Time on the Structure Characteristics and Magnetic Properties of FeSiBPCCuNb Amorphous Ribbons

Coatings, ISSN: 2079-6412, Vol: 15, Issue: 1
2025
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Article Description

In this paper, the structure characteristics and magnetic properties of FeSiBPCCuNb amorphous alloy ribbons annealed at 550 °C for different times were systematically investigated using X-ray diffraction, vibrating sample magnetometer, and atom probe chromatography. The results show that high-density Cu atomic clusters of appropriate sizes help to stabilize the α-Fe(Si) phase and improve the uniformity of the grains to enhance the soft magnetic properties. The solubility difference between the α-Fe(Si) phase and the B-rich phase, the formation of a localized amorphous structure in the transition region, and the inhibition of nanograin growth. However, when the annealing time is extended, the size of the α-Fe(Si) grains decreases, the grain boundary density increases and secondary phases such as Cu clusters become pinning sites for magnetic domain walls. This leads to a decrease in soft magnetic properties, an increase in hard magnetic properties, and a rapid increase in coercivity. When annealed at 550 °C for 20 min, the number density of Cu atomic clusters was 9.18 × 10 m, the spherical equivalent radius was 1.13 ± 0.29 nm, and the ribbons had good soft magnetic properties with a coercivity of 4.59 Oe. The saturation magnetic induction reached a peak value of 185.11 emu/g.

Bibliographic Details

Xi Huang; Lianbo Wang; Jiajun Li; Zemin Wang; Min Liu; Zhanyong Wang; Song Ding; Wenlong Zhu

MDPI AG

Physics and Astronomy; Materials Science

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