Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Effect of Magnetic Field Annealing on Microstructure and Magnetic Properties of FeCuNbSiB Nanocrystalline Magnetic Core with High Inductance

  • Fan, Xingdu (School of Materials Science and Engineering, Southeast University) ;
  • Zhu, Fangliang (School of Materials Science and Engineering, Southeast University) ;
  • Wang, Qianqian (School of Materials Science and Engineering, Southeast University) ;
  • Jiang, Mufeng (Londerful New Material Technology Corp.) ;
  • Shen, Baolong (School of Materials Science and Engineering, Southeast University)
  • Received : 2016.12.12
  • Accepted : 2016.12.22
  • Published : 2017.03.30
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Abstract

Transverse magnetic field annealing (TFA) was carried out on $Fe_{73.5}Cu_1Nb_3Si_{15.5}B_7$ nano-crystalline magnetic core with the aim at decreasing coercivity ($H_c$) while keeping high inductance ($L_s$). The magnetic field generated by direct current (DC) was applied on the magnetic core during different selected annealing stages and it was proved that the nanocrystalline magnetic core achieved lowest $H_c$ when applying transverse field during the whole annealing process (TFA1). Although the microstructure and crystallization degree of the nanocrystalline magnetic core exhibited no obvious difference after TFA1 compared to no field annealing, the TFA1 sample showed a more uniform nanostructure with a smaller mean square deviation of grain size distribution. $H_c$ of the nanocrystalline magnetic core annealed under TFA1 decreased along with the increasing magnetic field. As a result, the certain size nanocrystalline magnetic core with low $H_c$ of 0.6 A/m, low core loss (W at 20 kHz) of 1.6 W/kg under flux density of 0.2 T and high $L_s$ of $13.8{\mu}H$ were obtained after TFA1 with the DC intensity of 140 A. The combination of high $L_s$ with excellent magnetic properties promised this nanocrystalline alloy an outstanding economical application in high frequency transformers.

Keywords

References

  1. Fan X D, Men H, Ma A B, and Shen B L (2013) Soft magnetic properties in Fe84-xB10C6Cux nanocrystalline alloys. J. Magn. Magn. Mater. 326, 22-27. https://doi.org/10.1016/j.jmmm.2012.08.045
  2. Flohrer S and Herzer G (2010) Random and uniform anisotropy in soft magnetic nanocrystalline alloys (invited). J. Magn. Magn. Mater. 322, 1511-1514. https://doi.org/10.1016/j.jmmm.2009.07.087
  3. Fujii H, Yardley V A, Matsuzaki T, and Tsurekawa S (2008) Nanocrystallization of $Fe_{73.5}Si_{13.5}B_9Nb_3Cu_1$ soft-magnetic alloy from amorphous precursor in a magnetic field. J. Mater. Sci. 43, 3837-3847. https://doi.org/10.1007/s10853-007-2220-7
  4. Herzer G (1990) Grain size dependence of coercivity and permeability in nanocrystalline ferromagnets. IEEE Trans. Magn. 26, 1397-1402. https://doi.org/10.1109/20.104389
  5. Herzer G (1992) Nanocrystalline soft magnetic materials. J. Magn. Magn. Mater. 112, 258-262. https://doi.org/10.1016/0304-8853(92)91168-S
  6. Herzer G (1995) Soft magnetic nanocrystalline materials. Scripta Metall. Mater. 33, 1741-1756. https://doi.org/10.1016/0956-716X(95)00397-E
  7. Herzer G (1997) Nanocrystalline soft magnetic alloys. In: Handbook of Magnetic Materials, ed. Buschow K H, pp. 415-462, (Elsevier Science Pub., Amsterdam).
  8. Herzer G (2005) Anisotropies in soft magnetic nanocrystalline alloys. J. Magn. Magn. Mater. 294, 99-106. https://doi.org/10.1016/j.jmmm.2005.03.020
  9. Herzer G (2013) Modern soft magnets: amorphous and nanocrystalline materials. Acta. Mater. 67, 718-734.
  10. Hono K, Ping D H, Ohnuma M, and Onodera H (1999) Cu clustering and Si partitioning in the early crystallization stage of an $Fe_{73.5}Si_{13.5}B_9Nb_3Cu_1$ amorphous alloy. Acta Mater. 47, 997-1006. https://doi.org/10.1016/S1359-6454(98)00392-9
  11. Ito N, Michels A, Kohlbrecher J, Garitaonandia J S, Suzuki K, and Cashion J D (2007) Effect of magnetic field annealing on the soft magnetic properties of nanocrystalline materials. J. Magn. Magn. Mater. 316, 458-461. https://doi.org/10.1016/j.jmmm.2007.03.121
  12. Makino A (2012) Nanocrystalline soft magnetic Fe-Si-B-P-Cu alloys with high B of 1.8-1.9T contributable to energy saving. IEEE Trans. Magn. 48, 1331-1335. https://doi.org/10.1109/TMAG.2011.2175210
  13. Makino A, Inoue A, and Masumoto T (1995) Nanocrystalline soft magnetic Fe-M-B (M=Zr, Hf, Nb) alloys produced by crystallization of amorphous phase (overview). Mater. Trans. JIM 36, 924-938. https://doi.org/10.2320/matertrans1989.36.924
  14. Miglierini M, Prochazka V, Ruffer R, and Zboril R (2015) In situ crystallization of metallic glasses during magnetic field annealing. Acta Mater. 91, 50-56. https://doi.org/10.1016/j.actamat.2015.03.012
  15. Ohta M and Yoshizawa Y (2007) Magnetic properties of nanocrystalline $Fe_{82.65}Cu_{1.35}Si_xB_{16-x}$ alloys (x=0-7). Appl. Phys. Lett. 91, 062517. https://doi.org/10.1063/1.2769956
  16. Ohta M and Yoshizawa Y (2008) Magnetic properties of high-$B_s$ Fe-Cu-Si-B nanocrystalline soft magnetic alloys. J. Magn. Magn. Mater. 320, e750-e753. https://doi.org/10.1016/j.jmmm.2008.04.064
  17. Onodera R, Kimura S, Watanabe K, Yokoyama Y, Makino A, and Koyama K (2015) Nucleation control for fine nano crystallization of Fe-based amorphous alloy by high-magnetic-field annealing. J. Alloy. Compd. 637, 213-218. https://doi.org/10.1016/j.jallcom.2015.02.197
  18. Suzuki K and Herzer G (2012) Magnetic-field-induced anisotropies and exchange softening in Fe-rich nanocrystalline soft magnetic alloys. Scripta Mater. 67, 548-553. https://doi.org/10.1016/j.scriptamat.2012.03.006
  19. Suzuki K, Makino A, Inoue A, and Masumoto T (1991b) Soft magnetic properties of nanocrystalline bcc Fe-Zr-B and Fe-M-B-Cu (M=transition metal) alloys with high saturation magnetization (invited). J. Appl. Phys. 70, 6232-6237. https://doi.org/10.1063/1.350006
  20. Suzuki K, Makino A, Kataoka N, Inoue A, and Masumoto T (1991a) High saturation magnetization and soft magnetic properties of bcc Fe-Zr-B and Fe-Zr-B-M (M=transition metal) alloys with nanoscale grain size. Mater. Trans. JIM 32, 93-102. https://doi.org/10.2320/matertrans1989.32.93
  21. Willard M A, Laughlin D E, and McHenry M E (1998) Structure and magnetic properties of ($Fe_{0.5}Co_{0.5})_{88}Zr_7B_4Cu_1$ nanocrystalline alloys. J. Appl. Phys. 84, 6773-6777. https://doi.org/10.1063/1.369007
  22. Yoshizawa Y, Oguma S, and Yamauchi K (1988) New Fe-based soft magnetic alloys composed of ultrafine grain structure. J. Appl. Phys. 64, 6044-6046. https://doi.org/10.1063/1.342149
  23. Yoshizawa Y and Yamauchi K (1990) Fe-based soft magnetic alloys composed of ultrafine grain structure. Mater Trans. JIM 31, 307-314. https://doi.org/10.2320/matertrans1989.31.307

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