Title :
A contribution to the study of Alnico 5 thermal treatment in magnetic field
Author :
Marcon, G. ; Peffen, R. ; Lemaire, H.
Author_Institution :
L.T.P.C.M./E.N.S.E.E.G., Saint Martin d´´Hares, France
fDate :
9/1/1978 12:00:00 AM
Abstract :
Hard magnetic properties of Alnico 5 are very sensitive to the applied cooling rate under a magnetic field. A new experimental device has been designed, which allows to cool samples at a constant speed in the gap of an electromagnet. Cooling rates can be varied from 5°C/min. to 170°C/min, and the magnetic field can be turned on/off at any time. Results show that the optimum cooling rate for highest magnetic properties shifts from 22°C/min. before tempering to 50°C/min after tempering. The critical temperature for the effectiveness of the magnetic field is 837 ±5°C.
Keywords :
Alnico; Magnetic thermal factors; Coercive force; Cooling; Copper alloys; Heat treatment; Iron alloys; Magnetic field measurement; Magnetic fields; Magnetic properties; Permanent magnets; Temperature control;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1978.1059952
