Nanostructured melt-spun Sm(Co-Fe-Zr-B)/sub 7.5/ alloys for high temperature magnets

Author

Makridis, S.S. ; Litsardakis, G. ; Efthimiadis, K.G. ; Papathanasiou, G. ; Panagiotopoulos, I. ; Niarchos, D. ; Hadjipanayis, G.C.

Author_Institution

Dept. of Electr. & Comput. Eng., Aristotle Univ., Aristotelian, Greece

fYear

2003

fDate

March 30 2003-April 3 2003

Abstract

In this paper, we report high coercivity in as spun and annealed ribbons of Cu free Sm(Co/sub bal/Fe/sub z/Zr/sub y/B/sub x/)/sub 7.5/ samples, with varying B, Zr and Fe content (x-0.005-0.06, y=0.02-0.16, z=0.08-0.3) were studied. Also TEM studies have been used to investigate microstructure and grain size distribution. Average grain size is 30-50 nm is as spun ribbons and 70 to 100 nm for annealed ribbons. The grain distribution is very uniform in the scale of nanometers for the samples with square loop. Very good loop squareness and a maximum energy product of (BH)/sub max/=10.7 MGOe has been obtained at RT for sample with composition Sm(Co/sub bal/Fe/sub 0.3/Zr/sub 0.02/B/sub 0.04/)/sub 7.5/ after annealing at 600/spl deg/C for 75 min.

Keywords

annealing; boron alloys; cobalt alloys; coercive force; grain size; iron alloys; magnetic fluids; magnetic hysteresis; nanostructured materials; samarium alloys; transmission electron microscopy; zirconium alloys; 600 degC; 75 min; SmCoFeZrB; annealed ribbons; coercivity; grain size; high temperature magnets; loop squareness; microstructure; nanostructured melt-spun Sm(Co-Fe-Zr-B)/sub 7.5/ alloys; Conferences; Magnets; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2003. INTERMAG 2003. IEEE International

Conference_Location

Boston, MA, USA

Print_ISBN

0-7803-7647-1

Type

conf

DOI

10.1109/INTMAG.2003.1230389

Filename

1230389