1. Enhanced energy product in Y-Co-Fe magnets intermediate between Nd-Fe-B and ferrite.
- Author
-
Tozman, P., Venkatesan, M., Zickler, G. A., Fidler, J., and Coey, J. M. D.
- Subjects
NEODYMIUM compounds ,DOPED semiconductors ,FERRITES ,HYSTERESIS ,ANNEALING of semiconductors ,YTTRIUM compounds - Abstract
The hysteresis of ball-milled Fe-doped YCo5 powder has been optimized by controlling the temperature and time for rapid annealing under vacuum and argon. The crystallite size is only 25 nm; yet, it has been possible to field align Y(Co,Fe) powder with a 5-20 μm grain size in a 5 T field to obtain a remanence ratio of 0.65, due to texture in the ball-milled powder. The nominal energy product of the powder is 140 kJ/m³. A pressed magnet with 78% of theoretical density has an energy product of 65 kJ/m³. This magnet could fill the gap between oriented ferrite (34 kJ/m³) and oriented Nd-Fe-B (350 kJ/m³). [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF