Microchemistry and microstructure of SmCo 2:17 permanent magnets with Ni, Pr, and Ti substitutions

Author

Zhang, Yong ; Hadjipanayis, George C.

Author_Institution

Dept. of Phys. & Astron., Univ. of Delaware, Newark, DE, USA

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2925

Lastpage

2927

Abstract

This work is to study the element distribution and microstructure of Sm-Co 2:17 permanent magnets with Ni, Pr, and Ti substitution using TEM/STEM and nanoprobe EDS techniques. Pr substituting for Sm does not affect the microstructure but can prompt the diffusion of Cu into cell walls. Ti is almost uniformly distributed in the cellular structure and does not change the elemental distribution. High solubility of Ti in 2:17 cells may restrain the formation of the lamellar phases in the Ti-substituted sample. Ni substitution for Cu leads to the formation of inhomogeneous cellular-like structure. Ni is found to be concentrated in the cell boundary phases in highly Ni-substituted samples.

Keywords

chemical structure; cobalt alloys; crystal chemistry; nanostructured materials; nickel; nickel alloys; permanent magnets; phase diagrams; praseodymium alloys; samarium alloys; scanning-transmission electron microscopy; titanium; titanium alloys; transmission electron microscopy; EDS techniques; STEM; TEM; cell boundary phases; cellular structure; coercivity; element distribution; elemental distribution; lamellar phases; microchemistry; microstructure; nanoprobe; permanent magnets; Cells (biology); Iron; Magnetic field measurement; Magnetic properties; Microstructure; Permanent magnets; Scanning electron microscopy; Temperature; Transmission electron microscopy; Zirconium; Coercivity; microchemistry; microstructure; permanent magnets;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.832128

Filename

1325687