Effect of minor grain boundary additives on the magnetic properties of NdFeB magnets

Author

Kim, A.S. ; Camp, F.E.

Author_Institution

Crucible Res. Centre, Crucible Mater. Corp., Pittsburgh, PA, USA

Volume

31

Issue

6

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

3620

Lastpage

3622

Abstract

Cobalt has been known as an element to increase the Curie temperature but to decrease the coercivity of (Nd,Dy)FeB magnets. Because of this negative effect, various elements have been added to increase the coercivity but at the expense of remanence and/or Curie temperature. The combined addition of cobalt and small amounts of copper to (Nd,Dy)FeB alloy was found to substantially increase the coercivity without B_r and T_c reduction. As a result, the temperature stability and corrosion resistance have substantially improved without sacrificing any magnetic performance

Keywords

Curie temperature; alloying additions; boron alloys; coercive force; corrosion protection; dysprosium alloys; ferromagnetic materials; grain boundaries; iron alloys; neodymium alloys; permanent magnets; remanence; (Nd,Dy)FeB magnets; Curie temperatur; NdFeB magnets; coercivity; corrosion resistance; magnetic properties; minor grain boundary additives; remanence; temperature stability; Additives; Cobalt alloys; Coercive force; Copper alloys; Grain boundaries; Magnetic properties; Magnets; Remanence; Stability; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.489588

Filename

489588