Mechanically alloyed Sm-Fe-N magnets with addition of Ga

Author

Vasilyeva, E. ; Januszewski, D. ; Leonowicz, M.

Author_Institution

Fac. of Mater. Sci. & Eng., Warsaw Univ. of Technol., Poland

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3853

Lastpage

3855

Abstract

The magnetic properties and microstructure of Sm-Fe-N magnets with addition of Ga were studied. It was found that the coercivity initially increased and than decreased when Ga content exceeded 0.5 at%. Ga substituted Fe in the lattice of Sm₂Fe₁₇ phase and formed a (Sm,Ga)-rich phase at grain boundaries. Deterioration of the magnetic properties, for Ga contents above 0.5 at%, we attribute to a reduced nitrogen solubility in the lattice of the Sm₂(Fe,Ga) ₁₇N_x phase and towering of its anisotropy constants

Keywords

X-ray diffraction; alloying additions; coercive force; ferromagnetic materials; gallium alloys; grain boundaries; iron alloys; lattice constants; magnetic anisotropy; mechanical alloying; permanent magnets; powder metallurgy; remanence; samarium alloys; solid solubility; (Sm,Ga)-rich phase; Curie temperature; Ga addition effect; Sm₂(FeGa)₁₇N; Sm₂Fe₁₇ phase; anisotropy constants; coercivity; grain boundaries; lattice parameters; magnetic properties; mechanically alloyed Sm-Fe-N magnets; microstructure; reduced N solubility; remanence; Anisotropic magnetoresistance; Coercive force; Gallium alloys; Grain boundaries; Iron; Lattices; Magnetic properties; Magnets; Microstructure; Nitrogen;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.619593

Filename

619593