Hostname: page-component-cd9895bd7-hc48f Total loading time: 0 Render date: 2024-12-23T11:57:27.380Z Has data issue: false hasContentIssue false
  • English
  • Français

Soft Magnetic Properties of Nanocrystalline Fe–Co–B–Si–Nb–Cu Alloys in Ribbon and Bulk Forms

Published online by Cambridge University Press:  31 January 2011

Akihisa Inoue  and
Baolong Shen
Akihisa Inoue
Affiliation:
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
Baolong Shen
Affiliation:
Research and Development Project, CREST, Japan Science and Technology Corporation, Sendai 980-8577, Japan
Get access

Abstract

Ribbon and bulk nanocrystalline body-centered-cubic (bcc) (Fe,Co) alloys exhibiting good soft magnetic properties were synthesized in Fe71.5-xCoxB13.5Si10Nb4Cu1 system by the simple production processes of melt-spinning or casting and annealing. The glass-type alloys were formed in the Co content range below 30 at.%. These glassy alloys crystallized through two exothermic reactions. The first stage was due to the precipitation of nanoscale bcc-(Fe,Co) phase with a grain size of about 10 nm, and the second stage resulted from the decomposition of the remaining amorphous phase to α–(Fe,Co), (Fe,Co)2B, (Fe,Co)23B6, (Fe,Co)3Si, and (Fe,Co)2Nb phases. The glass transition temperature increased from 820 to 827 K with increasing Co content from 5 to 20 at.%, while the supercooled liquid region decreased slightly from 37 to 30 K because of the nearly constant crystallization temperature. By choosing the 10 at.% Co-containing alloy, we produced cylindrical glassy alloy rods 1.0 and 1.5 mm in diameter by copper mold casting. The subsequent annealing for 300 s at 883 K corresponding to the temperature just above the first exothermic peak caused the formation of nanoscale bcc-(Fe,Co) structure. The bcc-(Fe,Co) alloy rods exhibited good soft magnetic properties of 1.26 T for saturation magnetization and 5.0 A/m for coercive force, which were comparable to those for the corresponding bcc-(Fe,Co) alloy ribbon. The nanocrystalline alloy in a bulk form is encouraging for future use as a new type of soft magnetic material that requires three-dimensional shapes.

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 12 , December 2003 , pp. 2799 - 2806
Copyright
Copyright © Materials Research Society 2003

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1.Inoue, A., Shinohara, Y., and Gook, J.S., Mater. Trans. JIM 36, 1427 (1995).CrossRefGoogle Scholar
2.Inoue, A., Acta Mater. 48, 179 (2000).Google Scholar
3.Inoue, A. and Gook, J.S., Mater. Trans. JIM 37, 32 (1996).CrossRefGoogle Scholar
4.Pang, S.J., Zhang, T., Asami, K., and Inoue, A., Acta Mater. 50, 489 (2002).CrossRefGoogle Scholar
5.Shen, B.L., Kimura, H.M., Inoue, A., and Mizushima, T., Mater. Trans. JIM 41, 1675 (2000).CrossRefGoogle Scholar
6.Shen, B.L., Koshiba, H., Mizushima, T., and Inoue, A., Mater. Trans. JIM 41, 873 (2000).CrossRefGoogle Scholar
7.Shen, T.D. and Schwarz, R.B., Appl. Phys. Lett. 75, 49 (1999).CrossRefGoogle Scholar
8.Koshiba, H., Inoue, A., and Makino, A., J. Appl. Phys. 85, 5136 (1999).CrossRefGoogle Scholar
9.Pang, S.J., Zhang, T., Asami, K., and Inoue, A., J. Mater. Res. 17, 701 (2002).CrossRefGoogle Scholar
10.Inoue, A. and Shen, B.L., Mater. Trans. 43, 766 (2002).CrossRefGoogle Scholar
11.Inoue, A., Mater. Trans. JIM 36, 866 (1995).CrossRefGoogle Scholar
12.Inoue, A., Bulk Amorphous Alloys (Trans Tech Publications, Zurich, Switzerland, 1998), pp. 1–33.Google Scholar
13.Inoue, A., Shen, B.L., and Ohsuna, T., Mater. Trans. 43, 2337 (2002).CrossRefGoogle Scholar
14.Yoshizawa, Y. and Yamauchi, K., Mater. Trans. JIM 31, 307 (1990).CrossRefGoogle Scholar
15.Chen, H.S., Phys. Status Solidi A 17, 561 (1973).CrossRefGoogle Scholar
16.Chen, H.S., Sherwood, R.C., Leamy, H.J., and Gyorgy, E.M., IEEE Trans. Magn. 12, 933 (1976).CrossRefGoogle Scholar
17.Chen, H.S., Scripta Mater. 11, 367 (1977).CrossRefGoogle Scholar
18.Gibbs, H.J. and DiMarzio, E.A., The J. Chem. Phys. 28, 373 (1958).CrossRefGoogle Scholar
19.Ohnuma, M., Hono, K., Onodera, H., Pedersen, J.S., and Linderoth, S., Nano-Struct. Mater. 12, 693 (1999).CrossRefGoogle Scholar
20.Ohnuma, M., Hono, K., Linderoth, S., Pedersen, J.S., Yoshizawa, Y., and Onodera, H., Acta Mater. 48, 4783 (2000).CrossRefGoogle Scholar
21.Suzuki, K., Makino, A., Kataoka, N., Inoue, A., and Masumoto, T., Mater. Trans. JIM 32, 93 (1991).CrossRefGoogle Scholar
22.Makino, A., Hatanai, T., Naitoh, Y., Bitoh, T., Inoue, A., and Masumoto, T., IEEE Trans. Magn. 33, 3793 (1997).CrossRefGoogle Scholar
23.Willard, M.A., Huang, M.Q., Laughlin, D.E., McHenry, M.E., Cross, J.O., Harris, V.G., and Franchrtti, C., J. Appl. Phys. 85, 4421 (1999).CrossRefGoogle Scholar
24.McHenry, M.E. and Laughlin, D.E., Acta Mater. 48, 223 (2000).CrossRefGoogle Scholar
25.Boer, F.R., Boom, R., Mattens, W.C.M., Miedema, A.R., and Niessen, A.K., Cohesion in Metals (North-Holland, Amsterdam, The Netherlands, 1988), pp. 217–258.Google Scholar
26.Hagiwara, M., Inuoe, A., and Masumoto, T., Mater. Sci Eng. 54, 197 (1982).CrossRefGoogle Scholar
27.Chen, H.S., Rep. Prog. Phys. 43, 23 (1980).CrossRefGoogle Scholar