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Effect of Cu On Microstructural Evolution of Nanocrystalline Soft and Hard Magnetic Materials

Published online by Cambridge University Press:  21 February 2011

K. Hono ,
D. H. Ping  and
S. Hirosawa
K. Hono
Affiliation:
National Research Institute for Metals, 1-2-1 Sengen, Tsukuba 305-0047, Japan
D. H. Ping
Affiliation:
National Research Institute for Metals, 1-2-1 Sengen, Tsukuba 305-0047, Japan
S. Hirosawa
Affiliation:
Sumitomo Special Metals Co., Ltd., 2-15-17 Egawa, Osaka 618-0013, Japan
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Abstract

The nanocrystallization processes in Fe-Si-B-Nb-Cu and Fe-Nd-B(-Cu-Nb) amorphous alloys have been studied by transmission electron microscopy (TEM) and a three dimensional atom probe (3DAP). Cu additions are effective in refining the nanocrystalline microstructures of both alloys, because Cu atom clusters formed prior to the crystallization reaction serve as heterogeneous nucleation sites for the primary crystals. However, the clustering behaviors of Cu atoms in these two alloy systems are different, i.e., Cu completely dissolves in the Nd2Fe1 4B phase in the final microstructure of the Nd4.5Fe75.8B18.5Cu0.2Nb1 alloy, whereas CL' clusters grow to fcc-Cu particles in the Fe73.5Si13.5B9Nb3Cu1 alloy. The nanocrystallization processes in these two alloys clarified by the 3DAP results are compared.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 577: Symposium H – Advanced Hard and Soft Magnetic Materials , 1999 , 507
Copyright
Copyright © Materials Research Society 1999

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References

REFERENCES

1. Yoshizawa, Y., Oguma, S., and Yamauchi, K., J. Appl. Phys. 64, p. 6044 (1988).Google Scholar
2. Yoshizawa, Y. and Yamauchi, K., Mater. Trans. JIM, 31, p. 307 (1990).Google Scholar
3. Herzer, G., IEEE Trans. Magn. 25, p. 3327 (1989).Google Scholar
4. Hono, K., Hiraga, K., Wang, Q., Inoue, A., and Sakurai, T., Acta metall. mater. 40, p. 2137 (1992).Google Scholar
5. Hono, K., Li, J-L., Ueki, Y., Inoue, A., and Sakurai, T., Appl. Surf. Sci. 67, p. 398 (1993).Google Scholar
6. Coehoorn, R., Mooji, D. B. De, and Waard, C. De, J. Magn. Magn. Mater. 80, p. 101 (1989).Google Scholar
7. Kneller, H. E. and Hawig, R., IEEE Trans. Magn. MAG–27, p. 3588 (1991).Google Scholar
8. Hirosawa, S., Kanekiyo, H., and Uehara, M., J. Appl. Phys. 73, p. 6488 (1993).Google Scholar
9. Kanekiyo, H., Uehara, M., and Hirosawa, S., IEEE Trans. Magn. 29, p. 2863 (1993).Google Scholar
10. Hirosawa, S. and Kanekiyo, H., Mater. Sci. Eng. A 217, p. 367 (1996).Google Scholar
11. Ping, D. H., Hono, K. and Hirosawa, S., J. Appl. Phys. 83, p. 7769 (1998).Google Scholar
12. Hono, K., Ping, D. H., Ohnuma, M. and Onodera, H., Acta mater. 47, p. 997 (1999).Google Scholar
13. Blavette, D., Deconihout, B., Bostel, A., Sarrau, J. M., Bouet, M., and Menand, A., Rev. Sci. Instrum. 64, p. 2911 (1993).Google Scholar
14. Ayers, J. D., Harris, V. G., Sprague, J. A., Elam, W. T., and Jones, H. N., Acta mater. 46, p. 1861 (1998).Google Scholar
15. Suzuki, K., Kataoka, N., Inoue, A., Makino, A. and Masumoto, T., Mater. Trans. JIM, 31, p. 743 (1990).Google Scholar
16. Zhang, Y., Hono, K., Inoue, A. and Sakurai, T., Scripta metall. mater. 34, p. 1705 (1996).Google Scholar
17. Zhang, Y., Hono, K., Inoue, A., Makino, A. and Sakurai, T., Acta mater. 44, p. 1497 (1996).Google Scholar
18. Ping, D. H., Hono, K., Kanekiyo, H. and Hirosawa, S., J. Appl. Phys. 85, p. 2448 (1999).Google Scholar
19. Ping, D. H., Hono, K., Kanekiyo, H. and Hirosawa, S., IEEE Trans. Mag, in press.Google Scholar
20. Hamano, M., Yamasaki, M., Mizuguchi, H., Yamamoto, H. and Inoue, A. in Rare-Earth Magnets and their Applications, vol. 1, Proc. 5th Inter. Workshop on Rare-Earth Magnets and their applications, eds by Schultz, L. and Muller, K. H., Werkstoff-Informationsgesellschaft, Germany, 1998, pp. 199.Google Scholar
21. Wu, Y. Q., Ping, D. H. and Hono, K., IEEE Trans. Mag. in press.Google Scholar