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

Volume

26

Issue

5

fYear

1990

fDate

9/1/1990 12:00:00 AM

Firstpage

1951

Lastpage

1953

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.104918

Filename

104918