The studies of directional solidified RE-Co magnets

Author

Fu, Heng-zhi ; Liu, Xin-Cai ; Shi, Zheng-Xing ; Wang, Le-Yi ; Tang, Wei ; Li, Chang-gui ; Song, Hou-Ding

Author_Institution

Northwestern Polytech. Univ., Xi´´an, Shaanxi, China

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3797

Lastpage

3799

Abstract

A new kind of rare-earth-cobalt material, Sm 20-24 wt.%/Ce 5-10 wt.%/Fe 8-15 wt.%/Cu 6-15 wt.%/Zr 1-3 wt.%/Co, has been made by directional solidification technology with liquid metal cooling (DSTLMC). The effects of different states, microstructures, and domains on the intrinsic coercive forces, iH_c, were studied. The best magnetic properties of magnets prepared by the DSTLMC are B _r=9500 Gs, iH_c=5000 Oe, and (BH )_m=18.0 MGOe. The magnets can be cut to 0.02 cm in thickness, turned, and drilled. Fine particles of 1/5 phase and zigzag and narrow domains that develop during aging increase the resistance to motion of remagnetization domains, which increases the intrinsic forces of the magnets 525% above those that exist after the preceding solution treatment

Keywords

cerium alloys; cobalt alloys; coercive force; copper alloys; directional solidification; ferromagnetic properties of substances; iron alloys; magnetic domains; permanent magnets; remanence; samarium alloys; zirconium alloys; Sm-Ce-Fe-Cu-Zr-Co; aging; directional solidification; domains; intrinsic coercive forces; intrinsic forces; liquid metal cooling; magnetic properties; maximum energy product; microstructures; remagnetization domains; remanence; zigzag domains; Aging; Cooling; Copper; Inorganic materials; Magnetic liquids; Magnetic materials; Magnets; Microstructure; Surface treatment; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42436

Filename

42436