Magnetostatically-Coupled Anisotropic Composite Magnets with Enhanced Remanence
Abstract
The computer simulation confirmed a magnetostatic coupling between R-Fe-B matrix and thick Fe layers in hot-deformed composite magnets. However, enhancement in the remanence and maximum energy product of the hard-soft composites requires at least a partial inter-phase exchange coupling. The combination of a complete magnetostatic coupling and a partial exchange coupling may facilitate the development of anisotropic composite magnets with superior performance. The experimental studies found that (1) magneto-statically coupled soft magnetic phase increases the temperature dependence of the hard magnetic properties; (2) re-distribution of elements during thermomechanical treatment is a significant factor affecting the properties of anisotropic composite magnets; (3) though the refinement of the precursor powders enables certain control over the morphology and thickness of the soft inclusions, the expected advantages are overcome by the increased oxidation of the R-rich phase and/or increased inter-phase diffusion.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 2007
- Accession Number
- ADA470279
Entities
People
- George C. Hadjipanayis
Organizations
- University of Delaware