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Study on Nd-Fe-B Alloy Ingot Preparation and Its Microstructure
Corresponding Author(s) : Zi-Quan Liu
Asian Journal of Chemistry,
Vol. 26 No. 19 (2014): Vol 26 Issue 19
Abstract
The thick cast ingot, the thin cast ingot and the strip cast ingot were prepared separately with vacuum medium frequency induction melting furnace and band preparing furnace. The samples of Nd-Fe-B ingots were characterized by scanning electron microscopy and the features of organizational structure of type of ingot were also analyzed. The results show that, in thin sheet alloy ingot, grains are smaller and evenly distributed dispersion and its shape is columnar and Nd-rich phase is very thin. And there is no a-Fe segregation in the strip cast and so it is suitable for the manufacture of high performance sintered Nd-Fe-B magnets.
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References
A.S. Kim and F.E. Camp, J. Appl. Phys., 79, 5035 (1996); doi:10.1063/1.361566.
J. Fidler and T. Schrefl, J. Appl. Phys., 79, 5029 (1996); doi:10.1063/1.361565.
Y.K. Zhang, J. Gao, H. Yasuda, D.M. Herlach and J.C. He, J. Alloys Comp., 493, L8 (2010); doi:10.1016/j.jallcom.2009.12.067.
J. Pan, X. Liu and F. Tu, Rare Met., 25, 498 (2006); doi:10.1016/S1001-0521(07)60133-8.
K. Kuribayashi and S. Ozawa, J. Alloys Comp., 408-412, 266 (2006); doi:10.1016/j.jallcom.2005.04.058.
Y. Kawashita, N. Waki, T. Tayu, T. Sugiyama, H. Ono, H. Koyama, H. Kanno and T. Uchida, J. Magn. Magn. Mater., 269, 293 (2004); doi:10.1016/S0304-8853(03)00595-X.
M. Takahashi, K. Uchida, F. Taniguchi and T. Mikamoto, J. Appl. Phys., 83, 6402 (1998); doi:10.1063/1.367524.
M. Tokunaga, H. Kogure, M. Endoh and H. Harada, IEEE Trans. Magn., 23, 2287 (1987); doi:10.1109/TMAG.1987.1065287.
A.S. Kim and F.E. Camp, IEEE Trans. Magn., 31, 3620 (1995).
L.Q. Yu, Y.H. Wen and M. Yan, J. Magn. Magn. Mater., 283, 355 (2004).
X.X. Sun, X.Q. Bao, X.X. Gao, M.C. Zhang, Q.F. Dong and S.Z. Zhou, Rare Metal Mater. Eng., 1865 (2008) (in Chinese).
J. Bernardi, J. Fidler, M. Sagawa and Y. Hirose, J. Appl. Phys., 83, 6396 (1998); doi:10.1063/1.367557.