Title :
Phase composition and magnetic characteristics of inert gas-atomized RE-Fe-B-based powders
Author :
Lewis, L. Henderson ; Sellers, C.H. ; Panchanathan, V.
Author_Institution :
Div. of Mater. Sci., Brookhaven Nat. Lab., Upton, NY, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
Microstructure, phase constitution and temperature-dependent magnetic properties are examined for two size fractions of as-quenched RE-Nd-B-based powder produced by inert gas atomization for possible use as isotropic bonded magnet precursors. The atomized powders consist of the phase (Nd,Dy)2Fe14B with minute amounts of RE 2O3 and γ-Fe2O3. Evidence of compositional segregation with particle size is seen. Room-temperature magnetic properties are Hci=12 kOe and BR=5.4 kG for the 10-20 μm portion, Hci=1.8 kOe and BR=3 kG for the 100-150 μm portion
Keywords :
boron alloys; crystal microstructure; dysprosium alloys; ferromagnetic materials; magnetic particles; neodymium alloys; permanent magnets; segregation; stoichiometry; (Nd,Dy)2Fe14B; (NdDy)2Fe14B; 10 to 20 mum; 100 to 150 mum; 300 K; compositional segregation; inert gas atomization; microstructure; phase composition; powders; temperature-dependent magnetic properties; Bonding; Helium; Laboratories; Magnetic field measurement; Magnetic properties; Materials science and technology; Microstructure; Powders; Saturation magnetization; Scanning electron microscopy;
Journal_Title :
Magnetics, IEEE Transactions on
