Method of making magnets

Details Method of making magnets Method of making magnets

1975-04-07

1976-08-31

Satterfield, Walter R.

Metal treatment

Compositions

Heat treating

148103, 148105, 148108, 264 65, H01F 104

Patent

active

039779181

ABSTRACT:
A method of making an integral toroidal magnet comprising the steps of compacting suitable magnetic powder material into a toroidal shape while subjecting it to a particle aligning magnetic field, hot pressing the compacted powder toroid in a confining die at a temperature and pressure sufficient to cause shrinkage of the toroid in the axial direction and provide a packing density greater than 93% of the theoretical maximum value and substantially unidimensional shrinkage, heat treating the toroid at a temperature sufficiently higher than the hot pressing temperature to achieve an enhanced crystallographic alignment equivalent to the alignment obtained by sintering, annealing the toroid at a temperature sufficiently lower than the heat treating temperature to provide a magnetic coercivity similar to the coercivity achieved by annealing after sintering, and magnetizing the heat treated toroid in the direction of crystallographic alignment.

REFERENCES:
patent: 3540945 (1970-11-01), Strnat et al.
patent: 3684593 (1972-08-01), Benz et al.
patent: 3695945 (1972-10-01), Benz
patent: 3821034 (1974-06-01), Westendorp et al.

Affiliated with

Also associated with

Rating

Method of making magnets does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of making magnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of making magnets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1813703