Title :
Bulk isotropic and anisotropic nanocomposite rare-Earth magnets
Author :
Lee, D. ; Hilton, J.S. ; Chen, C.H. ; Huang, M.Q. ; Zhang, Y. ; Hadjipanayis, G.C. ; Liu, S.
Author_Institution :
Univ. of Dayton, OH, USA
fDate :
7/1/2004 12:00:00 AM
Abstract :
Bulk, isotropic and anisotropic nanocomposite magnets of (Nd,Pr,Dy)xFe100-x-y-z-u-vCoyAlzGauBv with x= 8-11.6, y= 6-6.3, z= 0-0.2, u= 0-0.2, and v= 5.6-10.0 were prepared and their magnetic properties as functions of rare-earth content, hot press temperature, and hot-deformation amount were investigated. For isotropic nanocomposite magnets, the best (BH)max of 16.2 MGOe was obtained when hot pressing Nd9.3Pr0.5Dy0.2Fe77.7Co6.3Al0.2Ga0. 2B5.6 at 660°C. The magnetic performance of anisotropic nanocomposite magnets is strongly dependent on the rare-earth content and the hot deformation amount. The best (BH)max of 42 MGOe was achieved in a hot-deformed Nd10.8Pr0.6Dy0.2Fe76.1Co6.3Al0.2Ga0 .2B5.6 magnet with 70% height reduction.
Keywords :
anisotropic media; ferromagnetic materials; hot pressing; magnetic anisotropy; nanostructured materials; rare earth alloys; anisotropic nanocomposite magnets; bulk magnets; hot press temperature; hot-deformation amount; isotropic magnets; magnetic performance; rare earth magnets; rare-earth content; Anisotropic magnetoresistance; Iron; Magnetic anisotropy; Magnetic materials; Magnetic properties; Magnets; Neodymium; Perpendicular magnetic anisotropy; Saturation magnetization; Soft magnetic materials; Anisotropic; full density; hot deformation; hot press; nanocomposite magnets; rare-earth magnets;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.829246
