Title :
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
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;
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
DOI :
10.1109/INTMAG.2002.1001425
