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S.S. Makridis, G. Litsardakis, K.G. Efthimiadis, G. Papathanasiou, I. Panagiotopoulos, S. Höfinger, J. Fidler, G.C. Hadjipanayis, D. Niarchos:
"Nanostructured melt-spun Sm(Co,Fe,Zr,B)_{sub 7.5} alloys for high-temperature magnets";
IEEE Transactions on Magnetics, 39 (2003), No. 5; S. 2869 - 2871.

Nanostructured melt-spun Sm(Co,Fe,Zr,B)/sub 7.5/ alloys for high-temperature magnets
Makridis, S.S. Litsardakis, G. Efthimiadis, K.G. Papathanasiou, G. Panagiotopoulos, I. Hofinger, S. Fidler, J. Hadjipanayis, G.C. Niarchos, D.
Dept. of Electr. & Comput. Eng., Aristotle Univ., Thessaloniki, Greece;
This paper appears in: Magnetics, IEEE Transactions on

Publication Date: Sept. 2003
On page(s): 2869- 2871
Volume: 39, Issue: 5
ISSN: 0018-9464
INSPEC Accession Number: 7782929
Abstract:
High coercivity, the highest for Cu-free 2 : 17 Sm-Co ribbons, has been obtained in as-spun (H/sub c/=21.1 kOe) and short time annealed (H/sub c/=23.2 kOe) samples of Sm(Co/sub bal/Fe/sub z/Zr/sub y/B/sub x/)/sub 7.5/ alloys, with varying B, Zr, and Fe content (x = 0-0.06, y=0-0.16, z = 0.08-0.3) and wheel speed. In as-spun samples, the TbCu/sub 7/ type structure and in annealed samples the Th/sub 2/Zn/sub 17/ and CaCu/sub 5/ type structures is observed, plus fcc Co as minority phase is observed. Reduced remanence (M/sub r//M/sub s/) is higher than 0.7. High-temperature magnetic measurements show very good stability above 300/spl deg/C with coercive field as high as 5.2 kOe at 330/spl deg/C. For annealed Sm(Co/sub bal/Fe/sub 0.3/Zr/sub 0.02/B/sub 0.04/)/sub 7.5/, very good loop squareness and high maximum energy product of 10.7 MGOe have been obtained. Increasing Zr content results in less uniform microstructure of annealed ribbons.

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