Title :
Upgraded Nd-Fe-B-AD (AD=Al,Ga) magnets: wettability and microstructure
Author :
Knoch, K.G. ; Grieb, B. ; Henig, E. Th ; Kronmüller, H. ; Petzow, G.
Author_Institution :
Max-Planck Inst. fuer Metallforschung, Stuttgart, West Germany
fDate :
9/1/1990 12:00:00 AM
Abstract :
An enhanced coercivity of sintered Nd-Fe-B permanent magnets by Al or Ga additions that is associated with a change in microstructure has been demonstrated. These microstructural modifications were detected by energy dispersive X-ray analysis (EDX)-assisted transmission electron microscopy (TEM). Two new ternary phases have been observed in Al-containing magnets. Improved wettability is given as an explanation for the modified microstructure, since similar results have been obtained for both Al and Ga additions
Keywords :
X-ray chemical analysis; aluminium alloys; boron alloys; coercive force; ferromagnetic properties of substances; gallium alloys; grain boundaries; iron alloys; neodymium alloys; sintering; transmission electron microscope examination of materials; wetting; EDX assisted TEM; NdFeBAl sintered permanent magnets; NdFeBGa magnet; coercivity; energy dispersive X-ray analysis; grain boundaries; microstructure; ternary phases; transmission electron microscopy; wettability; Alloying; Anisotropic magnetoresistance; Coercive force; Magnetic anisotropy; Magnetic properties; Magnetic separation; Microstructure; Permanent magnets; Perpendicular magnetic anisotropy; Solids;
Journal_Title :
Magnetics, IEEE Transactions on
