Preferences help
enabled [disable] Abstract
Number of results
2014 | 125 | 5 | 1172-1175
Article title

Effect of Al and Cu Additions on Microstructure and Magnetic Properties of NdTb-FeCo-B Magnets

Title variants
Languages of publication
With the addition of Al and/or Cu into the NdFeB based magnet, the soft free iron phase was not observed in the cast alloys while it exists in the microstructure of the undoped NdFeB ingots. For the undoped sample, free iron disappeared after hot deformation process. Grain orientation is not good and there are deviations in the growth direction of the lamellar grains which are not perpendicular to the pressing direction. On the other hand, there is a striking change that the intergranular chemistry of Al added ingot separated into Nd-rich phase and a ternary FeNdAl composition most probably formed at the pressing temperature of 750°C. The highest remanent magnetization of 7.47 kG obtained for this sample, it might be due to the hard magnetic properties of this ternary composition. For the Al-Cu added sample, the high H_{c} and B_{r} values of 7.71 kOe and 7.33 kG, respectively, can be attributed to the homogeneous distribution of the intergranular composition and good orientation of the magnetic grains by hot deformation process.

Physical description
  • Bulent Ecevit University, Department of Metallurgical and Materials Engineering 67100 Incivez, Zonguldak, Turkey
  • Istanbul Technical University, Department of Physics Engineering, 34469 Maslak, Istanbul, Turkey
  • Istanbul Technical University, Department of Metallurgical and Materials Engineering 34469 Maslak, Istanbul, Turkey
  • [1] J.P. Nozieres, R. Perrier De La Bathe, J. Magn. Magn. Mater. 80, 88 (1989), doi: 10.1016/0304-8853(89)90330-2
  • [2] V. Sinka, T. Kvackaj, O.B.G. Assis, M. Ferrante, J. Alloys Comp. 230, 42 (1995), doi: 10.1016/0925-8388(95)01902-2
  • [3] J.P. Yang, K.S. An, C.Y. Song, M. Kwon, T.S. Jeoung, S.C. Yang, IEEE Trans. Magn. 33, 3820 (1997), doi: 10.1109/20.619582
  • [4] P.J. McGuiness, G. Drazic, S. Kobe, D.N. Brown, B.M. Ma, IEEE Trans. Magn. 40, 2892 (2004), doi: 10.1109/TMAG.2004.832281
  • [5] A.M. Gabay, Y. Zhang, G.C. Hadjipanayis, J. Magn. Magn. Mater. 302, 244 (2006), doi: 10.1016/j.jmmm.2005.09.013
  • [6] J.P. Nozieres, R. Perrier De La Bathe, IEEE Trans. Magn. 25, 4117 (1989), doi: 10.1109/20.42540
  • [7] Y. Li, Y.B. Kim, T.S. Yoon, D.S. Suhr, T.K. Kim, C.O. Kim, J. Magn. Magn. Mater. 242-245, 1369 (2002), doi: 10.1016/S0304-8853(01)01285-9
  • [8] T. Shimoda, K. Akioka, O. Kobayashi, T. Yamagami, T. Ohki, M. Miyagawa, T. Yuri, IEEE Trans. Magn. 25, 4099 (1989), doi: 10.1109/20.42535
  • [9] M. Tokunaga, Y. Nozawa, K. Iwasaki, M. Endoh, S. Tanigawa, H. Harada, IEEE Trans. Magn. 25, 3561 (1989), doi: 10.1109/20.42365
  • [10] O.M. Ragg, I.R. Harris, J. Alloys Comp. 256, 252 (1997), doi: 10.1016/S0925-8388(96)02962-3
  • [11] Y. Liu, Y. Ma, J. Li, C. Li, F. Xie, L. Chu, IEEE Trans. Magn. 46, 2566 (2010), doi: 10.1109/TMAG.2010.2041554
  • [12] J. Fidler, J. Bernardi, J. Appl. Phys. 70, 6456 (1991), doi: 10.1063/1.349929
  • [13] B. Grieb, E.-Th. Henig, G. Martinek, H.H. Stadelmaier, G. Petzow, IEEE Trans. Magn. 26, 1367 (1990), doi: 10.1109/20.104380
  • [14] H. Okamoto, P.R. Subramanian, L. Kacprzak, in: ASM, Binary Alloy Phase Diagrams, Ed. T.B. Massalski, Materials Park (OH) 1990, p. 1734
  • [15] H. Okamoto, P.R. Subramanian, L. Kacprzak, in Ref. [14], p. 1213
  • [16] K.H.J. Buschow, Handbook of Magnetic Materials, Vol. 10, Elsevier Sci., Amsterdam 1997, doi: 10.1016/S1567-2719(97)10001-4
  • [17] H. Kronmüller, Phys. Status Solidi B 144, 385 (1987)
  • [18] B. Grieb, E.-Th. Henig, Z. Metallkd. 82, 560 (1991)
  • [19] G. Sadullahoğlu, B. Altuncevahir, O. Addemir, Acta Phys. Pol. A 123, 233 (2013), doi: 10.12693/APhysPolA.123.233
Document Type
Publication order reference
YADDA identifier
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.