Magnetic properties and microstructure of NdFeB sintered magnets by the addition of Ag powder

Author

Zhao, T.S. ; Kim, Yoon B. ; Jeung, W.Y.

Author_Institution

Metal Process. Res. Center, Korea Inst. of Sci. & Technol., Seoul, South Korea

Volume

36

Issue

5

fYear

2000

fDate

9/1/2000 12:00:00 AM

Firstpage

3318

Lastpage

3320

Abstract

NdFeB sintered magnets with the addition of Ag were prepared by blending hydrogen decrepitated NdFeB powder with Ag powder during ball milling. It was found that small additions of Ag powder increases the coercivity of the magnets without reducing the remanence. A microstructure study showed that oxygen content in the Nd-rich phase of the Ag-containing magnet is higher than that of the Ag-free magnet. This change in the composition of the Nd-rich phase increases the volume fraction of the Nd-rich phase in the Ag-containing magnet, which may be responsible for the increase of the coercivity

Keywords

alloying additions; boron alloys; coercive force; crystal microstructure; iron alloys; neodymium alloys; permanent magnets; powder metallurgy; remanence; silver alloys; Ag addition; NdFeBAg; ball milling; coercivity; hydrogen decrepitated NdFeB powder; microstructure; remanence; sintered magnets; volume fraction; Ball milling; Coercive force; Hydrogen; Magnetic properties; Magnets; Microstructure; Optical microscopy; Powders; Remanence; Scanning electron microscopy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.908784

Filename

908784