Accession Number : ADD007631

Title :   Method of Treating Sm2Co17-Based Permanent Magnet Alloys.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

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

Report Date : 12 May 1980

Pagination or Media Count : 5

Abstract : The reversible temperature coefficient of magnetization of a permanent magnet alloy over the temperature range from -50 degrees C to +150 degrees C is lowered by heat treating the alloy in a noble gas atmosphere or in a vacuum by the steps of (a) heating the alloy at about 1150 degrees C for 1.5 hours (b) quenching the alloy in ice water, (c) heating the alloy at about 940 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 2 hours, and (g) lowering the temperature to about 400 degrees C and heating for 10 hours. (Author)

Descriptors :   *Patent applications, *Permanent magnets, *Cobalt alloys, *Samarium compounds, *Processing, Temperature coefficients, Low temperature, Heat treatment, Quenching, Magnetization, Vacuum, Ice, Atmospheres, Gases, Rare gases, High temperature, Inventions

Subject Categories : Metallurgy and Metallography
      Fabrication Metallurgy
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE