The origin of crystallographic texture produced during hot deformation in rapidly-quenched NdFeB permanent magnets

Author

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

Author_Institution

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

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

2130

Lastpage

2132

Abstract

The authors present a model for the development of crystallographic texture by hot deformation in NdFeB magnets produced by rapid solidification. Favourably oriented grains, with their c-axis parallel to the compression axis, grow by mass transport through a Nd-rich liquid grain boundary phase, forming large platelet grains. The driving force is the elastic energy difference between grains with c-axes making different angles with the compression axis. Numerical calculations based on the known properties and conditions of these materials are consistent with a liquid diffusion model

Keywords

boron alloys; diffusion in liquids; ferromagnetic properties of substances; hot working; iron alloys; neodymium alloys; permanent magnets; rapid solidification; texture; Nd-rich liquid grain boundary phase; NdFeB permanent magnets; compression axis; crystallographic texture; elastic energy difference; grain orientation; hot deformation; large platelet grains; liquid diffusion model; mass transport; numerical calculations; rapid solidification; Capacitive sensors; Chemicals; Compressive stress; Crystallography; Grain boundaries; Grain size; Materials science and technology; Permanent magnets; Slabs; Solid modeling;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179419

Filename

179419