Crystallization Behavior and Curie Temperature Properties of Al Doped Nd-Fe-B Based Nanocomposite Permanent Magnet

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The work is primarily concerned with the development of nanocrystalline Nd-Fe-B, based permanent magnet with high Curie temperature. An alloy of composition Fe81Nd7Al2B10 has been prepared using vacuum arc furnace and subjected to using Melt-Spinning process for preparation of amorphous flakes. Differential scanning calorimetry (DSC) has been performed to determine the crystallization temperature and activation energy of the melt spun amorphous ribbons. Subsequently the melt spun ribbon was subjected to annealing at below and above the crystallization temperatures to identify effect of Al on the Curie temperature. It was noteworthy for the effect of alloying Al above crystallization temperature. The Curie temperature increases to by almost 1.3 times with increase in annealing temperature.

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Edited by:

B.S.S. Daniel and G.P. Chaudhari

Pages:

149-153

Citation:

S. Halder et al., "Crystallization Behavior and Curie Temperature Properties of Al Doped Nd-Fe-B Based Nanocomposite Permanent Magnet", Advanced Materials Research, Vol. 585, pp. 149-153, 2012

Online since:

November 2012

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$38.00

[1] K. Müller, G. Krabbes, J Fink, S. Gruß, A. Kirchner, G. Fuchs, New permanent magnets, J. Magn. Magn. Mater. 226-230 (2001) 1370-1376.

DOI: https://doi.org/10.1016/s0304-8853(00)00913-6

[2] G.C. Hadjipanayis, Nanophase hard magnets, J. Magn. Magn. Mater. 200 (1999) 373-91.

[3] J. Zhang, K. Lim, Y. Feng, Y. Li, Fe–Nd–B-based hard magnets from bulk amorphous precursor, Scripta. Mater. 56 (2007) 943-946.

DOI: https://doi.org/10.1016/j.scriptamat.2007.02.016

[4] W.S. Sun, S.D. Li, M.X. Quan, The effect of phase constituent on the magnetic properties for melt-spun Nd15Fe77B8 ribbons, J. Magn. Magn. Mater. 176 (2-3) (1997) 307-312.

DOI: https://doi.org/10.1016/s0304-8853(97)00429-0

[5] Q. Xiao, T. Zhao, Z. Zhang, E. Bruck, K. Buschow, F.D. Boer, Effect of grain size and magnetocrystalline anisotropy on exchange coupling in nanocomposite two-phase Nd-Fe-B magnets, J. Magn. Magn. Mater. 223 (2001) 215-220.

DOI: https://doi.org/10.1016/s0304-8853(00)01267-1

[6] A. Yan, X. Song and X. Wang, Effect of minor intergranular additives on microstructure and magnetic properties of Nd-Fe-B based magnets, J. Magn. Magn. Mater. 169 (1997) 193-198.

[7] A. Mitra, H.Y. Kin, B. Shen, N. Nishiyama and A. Inoue, Crystallization and Magnetic Properties of Fe40Co40Cu0. 5Al2Zr9Si4B4. 5 and Fe62Co9. 5Gd3. 5Si10B15 Amorphous Alloys, Mater. T. JIM. 44 (2003) 1562-1565.