Sm(Co,Fe,Cu,Zr)/sub z/ magnets for high temperature applications: microstructural and micromagnetic analysis

Author

Matthias, T. ; Scholz, W. ; Fidler, Josef ; Schrefl, T. ; Rong, T.S. ; Jones, I.P. ; Harris, I.R.

Author_Institution

Inst. of Appl. & Tech. Phys., Vienna Univ. of Technol., Austria

fYear

2002

Abstract

Summary form only given. Sm(Co,Fe,Cu,Zr)/sub z/ permanent magnets are the best choice for operating temperatures above 300/spl deg/C. A complex production process, which involves sintering, homogenizing, annealing and isothermal aging results in a cellular precipitation structure which acts as a pinning center for magnetic domain walls. The microstructure mainly develops during the annealing. A numerical micromagnetic model based on the finite element method was developed in order to analyze the influence of variations of the microstructure as well as the microchemistry on the coercive field.

Keywords

annealing; cobalt alloys; coercive force; copper alloys; finite element analysis; iron alloys; magnetic anisotropy; magnetic domains; micromagnetics; permanent magnets; samarium alloys; zirconium alloys; 300 degC; Sm(Co,Fe,Cu,Zr)/sub z/ magnets; SmCoFeCuZr; annealing; coercive field; finite element method; high temperature applications; magnetic domain walls; magnetocrystalline anisotropy; microchemistry; micromagnetic analysis; microstructural analysis; microstructure; Aging; Annealing; Isothermal processes; Magnetic domain walls; Micromagnetics; Microstructure; Numerical models; Permanent magnets; Production; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International

Conference_Location

Amsterdam, The Netherlands

Print_ISBN

0-7803-7365-0

Type

conf

DOI

10.1109/INTMAG.2002.1001425

Filename

1001425