Auger electron spectroscopy (AES) study on fractured rapidly-quenched and sintered NdFeB magnets

Author

Li, L. ; Graham, C.D., Jr.

Author_Institution

Dept. of Mater. Sci. & Eng., Pennsylvania Univ., Philadelphia, PA, USA

Volume

29

Issue

6

fYear

1993

fDate

11/1/1993 12:00:00 AM

Firstpage

2776

Lastpage

2778

Abstract

By using Auger electron spectroscopy (AES) to obtain chemical information from the fractured surfaces of rapidly quenched and sintered NdFeB magnets, it is found that the Nd-rich phases in the grain boundaries are different in these two kinds of magnets. In rapidly quenched NdFeB magnets, the Nd-rich phase is mainly Nd-Fe binary (Nd:Fe 2-3:1) without oxygen. In sintered NdFeB magnets, the Nd-rich phase is mainly Nd-Fe binary (Nd:Fe 2-3:1) without oxygen. In sintered NdFeB magnets, the Nd-rich phase is Nd-Fe-O (Nd:Fe:O 2-3:1:1). There are many Nd oxide particles (Nd:O about 1:1-1.5) of 1 μm in diameter in the sintered NdFeB, but not in the rapidly-quenched samples

Keywords

Auger effect; boron alloys; ferromagnetic properties of substances; fracture; grain boundaries; iron alloys; neodymium alloys; permanent magnets; rapid solidification; sintering; 1 micron; AES; Auger electron spectroscopy; Nd oxide particles; Nd-rich phases; NdFeB; fractured surfaces; grain boundaries; rapidly quenched magnets; sintered NdFeB magnets; Annealing; Corrosion; Electrons; Grain boundaries; Magnets; Neodymium; Spectroscopy; Stability; Surface cracks; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.281025

Filename

281025