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ISRN Nanotechnology
Volume 2012 (2012), Article ID 438436, 6 pages
http://dx.doi.org/10.5402/2012/438436
Research Article

Nanocrystalline Nd-Fe-B Alloys for Polymer-Bonded Magnets Production

1Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoseva 12, 11000 Belgrade, Serbia
2Institute for Technology of Nuclear and Other Mineral Raw Materials, Franse d’ Eperea 86, 11000 Belgrade, Serbia

Received 30 April 2012; Accepted 21 May 2012

Academic Editors: J. Ding and J. J. Suñol

Copyright © 2012 Aleksandar Grujić et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study presents how different nanostructures of starting Nd-Fe-B particles have influence on magnetic properties of polymer-bonded Nd-Fe-B materials. Two types of nanocrystalline Nd-Fe-B alloys were used for polymer composite production by compression molding technique. The particles with low neodymium content (Nd-low) have nanocomposite structure with small exchange coupling effect between hard and soft magnetic phase. In other hand, practically monophase hard magnetic structure of Nd-Fe-B particles with stoichiometric neodymium content (Nd-stoich) shows improved magnetic properties. With increasing concentration of polymer matrix, the coercivity (Hcb), remanence (Br), and maximum energy product ((BH)max) decrease more prominenty for composites with stoichiometric Nd-Fe-B content.