Accession Number : ADD008277

Title :   Method of Treating a Permanent Magnet Alloy.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Rothwarf,Frederick ; Bergner,Robert L ; Leupold,Herbert A ; Tauber,Arthur

Report Date : 22 Jul 1980

Pagination or Media Count : 2

Abstract : The reversible temperature coefficient of magnetization of a permanent magnet alloy is lowered by: (a) heating the alloy at about 1200 degrees C. for 2 hours; (b) quenching the alloy in ice water; (c) heating the alloy at about 850 degrees C. for 2 hours; (d) lowering the temperature to about 700 degrees C. and heating for one hour; (e) lowering the temperature to about 600 degrees C. and heating for one hour; (f) lowering the temperature to about 500 degrees C. and heating for one hour; (g) lowering the temperature to about 400 degrees C. and heating for four hours; and (h) lowering the temperature to about 280 degrees C. and heating for 12 hours. The method is particularly effective in lowering the reversible temperature coefficient of magnetization of the permanent magnet alloy Sm2Cu1.6Zr0.16Fe3.3Co12. (Author)

Descriptors :   *Patents, *Permanent magnets, *Temperature coefficients, *Heat treatment, Reversible, Samarium intermetallics, Copper alloys, Zirconium alloys, Iron alloys, Cobalt alloys, Magnetization, Quenching

Subject Categories : Metallurgy and Metallography
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE