Phase Structure and Magnetic Properties of Fe-Nb-B-Nd Type of Bulk Nanocrystalline Alloys

Abstract:

In this work we present phase structure and magnetic properties of the (Fe₈₀Nb₆B₁₄)_1-x Nd_x (x=0.08, 0.12, 0.16) bulk nanocrystalline alloys prepared by making use of mould casting technique. The applied mould allows obtaining bulk rods of 1.5 mm in diameter and about 3 cm in length. Phase structure and magnetic properties were carefully examined. It was shown that the applied preparation technique is favorable to nanocrystallization of the alloys, which was confirmed by the XRD diffraction. For all studied alloys, one can observe a formation of mainly Nd₂Fe₁₄B (hard magnetic) and Fe phases with different contributions dependently on the x parameter. It was also shown that the alloy of (Fe₈₀Nb₆B₁₄)_0.92Nd_0.08 has the best hard magnetic properties with the coercive field, magnetic saturation and maximum energy product equal to 0.2 T, 117 emu/g and 13.4 kJ/m3, respectively (at room temperature). Moreover, the coercive field and maximum energy product are gradually deteriorating with increasing of rare earth addition.

• Periodical: Solid State Phenomena (Volumes 203-204)
• Pages: 302-305
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.203-204.302
• Online since: June 2013
• Authors: Grzegorz Ziółkowski, Artur Chrobak, Joanna Klimontko
• Keywords: Bulk Nanocrystalline Alloys, Hard Magnets, Mould Casting Technique

References

[1] M. E. McHenry, E. Laughlin, Progress in Mater. Sci. 44 (1999), p.291.

[2] A Chrobak, D. Chrobak, G. Haneczok, P. Kwapuliński, Z. Kwolek and M. Karolus, Mater. Sci. Eng. A 382 (2004), p.401

DOI: 10.1016/j.msea.2004.05.013

[3] H. Chiriac, N. Lupu, J. Non-Crystall. Solids 250-252 (1999), p.751

[4] M. Stoica, S. Roth, J. Eckert, L. Schultz, M.D. Baro, J. Magnet. Magnet. Mater. 290–291 (2005), p.1480

[5] K. Biswas, S. Ram, S. Roth, L. Schultz, J. Eckert, J. Mater. Sci. 41 (2006), p.3445

[6] Q. Wang, C. L. Zhu, C. Dong, J. B. Qiang, W. Zhang and A. Inoue, J. Phys. Conference Series 98 (2008), p.012017.

[7] A. Inoue, Mat. Sci. Eng. A 226-228 (1997), p.357

[8] A. Chrobak, M. Karolus, G. Haneczok, Solid State Phenomena 163 (2010), p.233.

[9] G. Ziółkowski, N. Randrianantoandro, A. Chrobak, J. Klimontko, M. Kądziołka-Gaweł, G. Haneczok, Acta Physica Polonica A 121 (2012), p.1266.

DOI: 10.12693/aphyspola.121.1266

[10] Chrobak, G. Ziołkowski, N. Randrianantoandro, J.Klimontko, G. Haneczok, J. Alloys Compd 537 (2012), p.154