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http://dx.doi.org/10.4313/JKEM.2010.23.12.988

Fabrication of the (Alnico, Sm-Co) Bonded Magnet and its Magnetic Properties  

Kim, Jung-Sik (Department of Materials Science and Engineering, The University of Seoul)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.23, no.12, 2010 , pp. 988-995 More about this Journal
Abstract
In this study the (Alnico, Sm-Co) bonded magnets were fabricated by mixing the Sm-Co added alnico alloy powders with epoxy resin and binder, appropriately. Also, the hybrid ring magnets of (Alnico, Sm-Co)/Sr-ferrite were fabricated by coupling the Sr-ferrite composite layer with an (Alnico, Sm-Co) magnet. The magnetic properties of (Alnico, Sm-Co) ring magnets were varied with the amount of Sm-Co powders. The addition of Sm-Co powders increased a remanent induction($B_r$) and coercive force($_BH_C$), while decreasing a surface flux density and repulsive distance. The surface flux density and repulsive distance for the (Alnico, Sm-Co) ring magnet increased with a magnetizing voltage up to about 160 V and reached an apparent saturation point. Also, the measurements of temperature and moisture characteristics showed that the surface flux densities of N-S poles and repulsive distance decreased a little within 4% after 10 days passed.
Keywords
Alnico alloy; Sm-Co alloy; Bonded magnet; Magnetic properties; Magnetic materials processing;
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