Phase composition and magnetic characteristics of inert gas-atomized RE-Fe-B-based powders

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)/sub 2/F...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1995-11, Vol.31 (6), p.3641-3643
Main Authors: Henderson Lewis, L., Sellers, C.H., Panchanathan, V.
Format: Article
Language:English
Subjects:
Bonding
Laboratories
Magnetic field measurement
Magnetic properties
Materials science and technology
Microstructure
Powders
Saturation magnetization
Scanning electron microscopy
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Summary: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)/sub 2/Fe/sub 14/B with minute amounts of RE/sub 2/O/sub 3/ and /spl gamma/-Fe/sub 2/O/sub 3/. Evidence of compositional segregation with particle size is seen. Room-temperature magnetic properties are H/sub ci/=12 kOe and B/sub R/=5.4 kG for the 10-20 /spl mu/m portion, H/sub ci/=1.8 kOe and B/sub R/=3 kG for the 100-150 /spl mu/m portion.
ISSN:0018-9464
1941-0069
DOI:10.1109/20.489595