Advertisement

Inorganic Materials: Applied Research

, Volume 4, Issue 3, pp 256–259 | Cite as

Role of terbium hydride additions in the formation of microstructure and magnetic properties of sintered Nd-Pr-Dy-Fe-B magnets

  • A. A. LukinEmail author
  • N. B. Kol’chugina
  • G. S. Burkhanov
  • N. E. Klyueva
  • K. Skotnitseva
Joining of Materials

Abstract

Peculiarities of the formation of the high-coercivity state of sintered magnets prepared from a rare-earth-metal-depleted Nd-Pr-Dy-Fe-B composition alloyed with terbium hydride were studied. Terbium hydride additions were shown to increase substantially the magnetization coercive force and to decrease slightly the residual inductance. An inhomogeneous distribution of Nd(Pr) and Tb(Dy) within hard-magnetic Nd2Fe14B phase grains was found; the size of regions of inhomogeneity was 30–150 nm.

Keywords

coercive force microstructure of permanent magnets Nd2Fe14terbium hydride 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Glebov, V.A. and Lukin, A.A., Nanokristallicheskie redkozemel’nye magnitotverdye materialy (Nanocrystalline rare-earth magneto-solid materials), Moscow: VNIINM, 2007.Google Scholar
  2. 2.
    Guo, S., Chen, R.J., Ding, Y., Yan, G.H., Lee, D., and Yan, A.R., Effect of DyHx addition on the magnetic properties and microstructure of Nd14.1Co1.34Cu0.04Febal.B5.84 magnets, J. Phys.: Conf. Ser., 2011, vol. 266, p. 012030.CrossRefGoogle Scholar
  3. 3.
    Li, W.F., Sepehri-Amin, H., Ohkubo, T., Hase, N., and Hono, K., Distribution of Dy in high-coercivity (Nd, Dy)-Fe-B sintered magnet, Acta Mater., 2011, vol. 59, pp. 3061–3069.CrossRefGoogle Scholar
  4. 4.
    Sepehri-Amin, H., Ohkubo, T., and Hono, K., Grain boundary structure and chemistry of Dy-diffusion processed Nd-Fe-B sintered magnets, J. Appl. Phys., 2010, vol. 107, pp. 745–747.CrossRefGoogle Scholar
  5. 5.
    Glebov, V.A., Glebov, A.V., Bakulina, A.S., et al., Study of first russian magnetic alloys prepared by “Strip-casting” technique, Fiz. Chim. Obrab. Mater., 2011, no. 3, pp. 16–20.Google Scholar
  6. 6.
    Ustinovshchikov, Yu.I. and Pushkarev, B.U., Ordering, phase separation, and phase transformations in Fe-M alloys, Phys.-Usp., 2006, vol. 49, pp. 593–603.CrossRefGoogle Scholar
  7. 7.
    Vial, F., Joly, F., Nevalainen, E., Sagawa, M., Hiraga, K., and Park, K.T., Improvement of coercivity of sintered NdFeB permanent magnets by heat treatment, J. Magn. Magn. Mater., 2002, vol. 242–245, pp. 1329–1334.CrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2013

Authors and Affiliations

  • A. A. Lukin
    • 1
    Email author
  • N. B. Kol’chugina
    • 2
  • G. S. Burkhanov
    • 2
  • N. E. Klyueva
    • 2
  • K. Skotnitseva
    • 3
  1. 1.SPA Magnets and Magnetic Systems, Co., Ltd.MoscowRussia
  2. 2.Baikov Institute of Metallurgy and Materials ScienceRussian Academy of SciencesMoscowRussia
  3. 3.Vysoka Skola Banska-Technical University of OstravaOstravaCzech Republic

Personalised recommendations