Title :
Magnetic properties of the BCC phase at grain boundaries in the Nd-Fe-B permanent magnet
Author :
Sagawa, M. ; Hirosawa, S. ; Yamamoto, H. ; Matsuura, H. ; Fujimura, S. ; Tokuhara, H. ; Hiraga, K.
Author_Institution :
Sumitomo Special Metals Company, Ltd., Osaka, Japan
fDate :
9/1/1986 12:00:00 AM
Abstract :
Structural and magnetic studies have been carried out on a bcc phase that appears in melt-spun rare earth-iron based alloys during a heat treatment at temperatures ranging from 700K to 770K. It has been found that the bcc phase has a lattice constant very close to that for α-Fe and that it is a soft magnet with Curie temperatures in a 400-450K range. Relation of this phase to a bcc boundary phase in sintered Nd-Fe-B magnet and its role in the magnetic hardening mechanism in the Nd-Fe-B magnets is discussed.
Keywords :
Magnetic thermal factors; Permanent magnets; Annealing; Electrons; Grain boundaries; Heat treatment; Iron alloys; Magnetic properties; Neodymium; Permanent magnets; Phase detection; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1986.1064430
