Nanocrystallization of Fe-Based Amorphous Alloys Fe_73.5Cu₁Nb₃Si_13.5B₉ by Yb-Doped Fiber Laser Overlapping Irradiation

Abstract:

The paper presents a laser irradiation method for rapidly fabricating Fe-based nanocrystalline alloys using Yb-doped fiber laser with a wavelength of 1070nm by overlapping irradiation of the heated areas. The samples are annular cores rolled with 20μm-thick and 3.2mm-wide belts of amorphous alloy Fe_73.5Cu₁Nb3Si_13.5B₉ , which have internal diameter of 14 mm and external diameter of 20 mm. Every side of the samples is irradiated for 15 min by fiber laser. X-ray diffraction and transmission electron microscopy (TEM) are used for microstructure analysis and observation. The samples irradiated by a defocus beam with a diameter of 7.1mm through a lens have better soft magnetic properties than directly by an original collimating beam with a diameter of 6.7mm. The dimension of homogeneous ultrafine grains is about 10nm with a bcc α-Fe (Si), which is the foundation of the excellent soft magnetic property. Uniform laser irradiation and the appropriate laser power are necessary for optimum microstructure and soft magnetic properties.

• Periodical: Advanced Materials Research (Volumes 482-484)
• Pages: 2365-2370
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.482-484.2365
• Online since: February 2012
• Authors: Qian Li Ma, Yong Bao, Guo Rui Zhang, Li Meng Yu, Ling Fei Ji, Yi Jian Jiang
• Keywords: Fe_73.5Cu₁Nb₃Si_13.5B₉, Laser Irradiation, Nanocrystallization, Yb-Doped Fiber Laser

References

[1] Guorui. Zhang, Yong.Bao, Qianli. Ma, Lingfei. Ji, Yijian. Jiang: Advanced Material Research Vol. 287(2011), p.2351

[2] J. Petzold; Scripta Materialia Vol. 48(2003), p.898

[3] G. Herzer: Journal of Magnetism and Magnetic Materials Vol. 112 (1992), p.258

[4] G. Herzer: IEEE Transactions on Magnetics Vol. 25 (1989), p.3327

[5] Y. Z. Fang, J. J. Zheng, F. M. Wu, Q. M. Xu, J. Q. Zhang, H. Q. Ye, J. L. Zheng and T. Y. Li: Applied Physics Letters Vol. 96(2010), p.092508

[6] Y. Yoshizawa: Scripta Materialia. Vol. 44(2001), p.1321

[7] Y. Yoshizawa, S. Oguma and K. Yamauchi: Journal of Applied Physics Vol. 64 (1988), p.6044

[8] P. Allia, P. Tiberto, M. Baricco and F. Vinai: Applied Physics Letters Vol. 63 (1993), p.2759

DOI: 10.1063/1.110326

[9] L. Lanotte and V. Iannotti: Journal of Applied Physics Vol. 78(1995), p.3531

[10] L. Lanotte, Z. Kaczkowski, R. Pasquino, G. Palazzo and V. Tagliaferri: Journal of Magnetism and Magnetic Materials Vol. 135(1994), p.265

DOI: 10.1016/0304-8853(94)90356-5

[11] L. Lanotte, C. Luponio, I. Delorio, V. Tagliaferri and G. Tammaro: Materials Science and Technology Vol. 8(1992), p.252

[12] L.F. Ji, Y.J. Jiang, W. Wang and Z.L. Yu: Applied Physics Letters Vol. 85 (2004), p.1577

[13] L. Chang, Y. Jiang, L. Ji: Applied Physics Letters Vol. 90 (2007)

[14] M. Sorescu,E. T. Knobbe: Phys. Rev Vol. B51(1995), p.841

[15] Anna Sypien, Jan Kusinski, E.Chris Nelson: Materials Chemistry and Physics Vol.81 (2003), p.390

[16] G. Herzer: IEEE Transactions on Magnetics Vol. 26 (1990), p.1397