Sm.sub.2co in17 xx alloys suitable for use as permanent magnets

Details Sm.sub.2co in17 xx alloys suitable for use as permanent magnets Sm.sub.2co in17 xx alloys suitable for use as permanent magnets

C - Chemistry, Metallurgy

22

C

75/106

C22C 19/07 (2006.01) H01F 1/04 (2006.01)

Patent

CA 1252310

ABSTRACT OF THE DISCLOSURE An Sm2Co17 alloy contains by weight 22.5 to 23.5% Sm as an effective amount, 20.0 to 25.0% Fe, 3.0 to 5.0% Cu, 1.4 to 2.0% Zr as an effective amount, minor amounts of oxygen and carbon, an additional amount of Sm in the range of from about 4 to about 9 times the oxygen content of the alloy, an additional amount of Zr in the range of from about 5 to about 10 times the carbon con- tent of the alloy, the balance being cobalt. The alloy has a crystallographic structure comprising cells of 2-17 Sm-Co rhombohedral phase surrounded by a continuous network of the 1-5 Sm-Co nexagonal phase.

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