Preparation and properties of FeZrB amorphous-nanocrystalline soft magnetic alloy

Abstract

Fe₆₈Zr₂₀B₁₂ amorphous alloy was prepared by mechanical alloying(MA) method and annealed at different temperatures. Microstructures and magnetic properties of Fe₆₈Zr₂₀B₁₂ alloys as-milled and annealed at 693, 843, 943 and 993 K were studied. The raw powders(Fe, Zr, B) formed b. c. c. α-Fe solid solution at early stages of MA and then transformed into amorphous alloy. Grain size(D) of Fe₆₈Zr₂₀B₁₂ alloys increases with increasing annealing temperature and keeps at nanometer level. The specific saturation magnetization(σ _s) increases with increasing annealing temperature from 300 K to 943 K, and then decreases with annealing temperature at 993 K because of the precipitation of Fe₃B.

Keywords

FeZrB amorphous-nanocrystalline alloy / grain size / specific saturation magnetization

References

[1] Makino A., Hatanai T., Inoue A., . Nanocrystalline Soft Magnetic Fe-M-B(M=Zr, Hf, Nb) Alloys and their Applications[J]. Mater. Sci. Eng., 1997, A226–228: 594-602.

[2] Makino A., Suzuki K., Inoue A., . Magnetic Properties and Microstructure of Nanocrystalline bcc Fe-M-B(M=Zr, Hf, Nb) Alloys[J]. J. Magn. Magn. Mater, 1994, 133: 329-333.

[3] Shen B. G., Xu R. F., Zhao G. J., . Effect of Composition on Curie Temperature, Magnetic Moment, and High-field Susceptibility of Amorphous Fe_90−xM_xZr₁₀ (M=V, Cr, Mn, Co, Ni, Cu, Si, and B) Alloys[J]. Phys. Rev. B, 1991, 43(13): 11005-11009.

[4] Gona M. N., Yanase S., Hashi S., . Magnetoimpedance Effect in Nanocrystalline FeZrNbB Ribbons[J]. J. Magn. Magn. Mater., 2003, 254: 466-468.

[5] Grabias A., Kopcewicz M., Oleszak D. Phase Transformations in the Fe(Co, Ni)ZrB Alloys Induced by Ball Milling[J]. J. Alloys. Compounds, 2002, 339: 221-229.

[6] Liu Y. J., Chang I. T. H., Lees M. R. Influences of Oxide Phases on the Coercivity of Mechanically Alloyed Multicomponent Fe-based Amorphous Alloys[J]. Scripta Mater., 2001, 44(12): 2729-2734.

[7] He S. L., He K. Y. Magnetic Properties of (Fe_{1 −x}Co_x)₈₄Zr_3.5Nb_3.5B₈Cu₁(x=0–0.8) Amorphous Alloy at High and Low Temperature[J]. Metallic Functional Materials, 2002, 9(3): 34-37.

[8] Hu Y., Lin L., Chan K. C., Pan M. X., . The Effect of Crystallization on Microstructure and Magnetic Properties of Fe₆₁Co₇Zr_9.5Mo₅W₂B_15.5 Bulk Metallic Glass[J]. Materials Letters, 2006, 60: 1080-1084.

[9] Zhi Q. Z., Wang J. J., Chen W. Z., . Structure and Magnetic Properties of Nanocrystalline Fe-Nb-B Alloys[J]. Journal of Northeastern University, 2004, 25(1): 1072-1075.