Study on the Nanostructure and Magnetic Properties of NdFeNbB Permanent Magnets

X.F. Wang; X.Y. Chen; Z.L. Jiang; Y. Chen; H.M. Chen

doi:10.4028/www.scientific.net/MSF.638-642.1749

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HomeMaterials Science ForumMaterials Science Forum Vols. 638-642Study on the Nanostructure and Magnetic Properties...

Study on the Nanostructure and Magnetic Properties of NdFeNbB Permanent Magnets

Abstract:

Nd2Fe14B/-Fe nanocomposite permanent magnet contains the hard and soft magnetic phases, Nd2Fe14B and -Fe respectively. An exchange coupling effect exists between the two magnetic phases. The effect of alloying element Nb on its nanostructure and properties have been studied. Adding Nb to the alloy is effective to refine grains, a relatively small grain size causes a high intrinsic coercivity, remanence and therefore a high maximum energy product, (BH)max. MFM (Magnetic Force Microscope) was used to observe the magnetic micro-domain structure in the nanophase alloys. The length of the magnetic contrast shows a significant dependence on the microstructure and phase constitution, and the longer length is correspond with the larger exchange coupling effect between the soft and hard magnetic phases.

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Materials Science Forum (Volumes 638-642)

Pages:

1749-1754

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.638-642.1749

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Online since:

January 2010

Authors:

X.F. Wang, X.Y. Chen, Z.L. Jiang, Y. Chen, H.M. Chen

Keywords:

Exchange Coupling, Interaction Domain, Nanocomposite, Permanent Magnet

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