Publication Date:
2014-02-01
Description:
We report bulk SmCo 3 /α-Fe nanocomposite magnets prepared via high energy ball milling and warm compaction. The evolution of structure and magnetic properties with soft phase fraction have been systematically studied. Microstructural studies revealed that grain size of the nanocomposite magnets can be controlled below 20 nm with a homogeneous distribution of α-Fe phase in the matrix of hard magnetic SmCo 3 phase after severe plastic deformation. The refinement of the hard and soft phases morphology in nanoscale leads to effective inter-phase exchange coupling that gives rise to single-phase-like demagnetization behavior with enhanced remanence and maximum energy product (BH) max . The (BH) max up to 13.5 MGOe in the isotropic SmCo 3 /α-Fe nanocomposites with 25 wt. % of the soft phase has been obtained. Magnetic characterization at elevated temperatures shows that the nanocomposite SmCo 3 /α-Fe magnets have improved energy product compared to the single-phase SmCo 3 magnets.
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics
