The Influence of Annealing on the Structural and Soft Magnetic Properties of (Fe0.4Co0.6)79Nb3B18 Nanocrystalline Alloys
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. Structure Identification and Thermal Properties in the As-Quenched (Fe0.4Co0.6)79Nb3B18 Alloys
3.2. Structural Evolution in the Annealed (Fe0.4Co0.6)79Nb3B18 Alloys
3.3. Variation of Grain Size and Annealing Temperature
3.4. Soft Magnetic Properties
4. Conclusions
- (1)
- During the crystallization process in the (Fe0.4Co0.6)79Nb3B18 alloys, a mixture of α-Fe(Co), Fe2B, and Fe23B6 phases is first precipitated from the amorphous matrix, and then the formation of α-Fe(Co), Fe2B, and Fe3B phases occurs due to the decomposition of the metastable Fe23B6 phase.
- (2)
- For alloys annealed at Tg~Tx1, as the incubation time increases, the saturation magnetization first remains unchanged, and then increases steadily, while the coercivity decreases first and then increases.
- (3)
- The mean grain sizes of the annealed (Fe0.4Co0.6)79Nb3B18 alloys first decrease and then increase with the increase of annealing temperature. The mean grain size reaches the minimum value of 12.7 nm for alloys annealed at 880 K.
- (4)
- The annealed (Fe0.4Co0.6)79Nb3B18 alloys exhibit excellent magnetic properties with high saturation magnetization and low coercivity. With the increase of annealing temperature, the saturation magnetization first increases and then decreases, while coercivity is not obviously enhanced. The alloys annealed at 880 K with the finest grain size exhibit the optimized soft magnetic properties.
Author Contributions
Funding
Conflicts of Interest
References
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Zhu, M.; Fa, Y.; Yao, L.; Tao, P.; Jian, Z.; Chang, F. The Influence of Annealing on the Structural and Soft Magnetic Properties of (Fe0.4Co0.6)79Nb3B18 Nanocrystalline Alloys. Materials 2018, 11, 2171. https://doi.org/10.3390/ma11112171
Zhu M, Fa Y, Yao L, Tao P, Jian Z, Chang F. The Influence of Annealing on the Structural and Soft Magnetic Properties of (Fe0.4Co0.6)79Nb3B18 Nanocrystalline Alloys. Materials. 2018; 11(11):2171. https://doi.org/10.3390/ma11112171
Chicago/Turabian StyleZhu, Man, Yang Fa, Lijuan Yao, Peng Tao, Zengyun Jian, and Fang’e Chang. 2018. "The Influence of Annealing on the Structural and Soft Magnetic Properties of (Fe0.4Co0.6)79Nb3B18 Nanocrystalline Alloys" Materials 11, no. 11: 2171. https://doi.org/10.3390/ma11112171