Method for manufacturing permanent magnets

Details Method for manufacturing permanent magnets Method for manufacturing permanent magnets

1987-06-11

1989-01-31

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148104, 148302, 419 12, 419 23, H01F 102

Patent

active

048013404

ABSTRACT:
A method for manufacturing a permanent magnet using alloys of the formula R(T.sub.1-y M.sub.y).sub.z, wherein R denotes one or two species of rare earth metals, including Y, T denotes transition metals, principally Fe or Fe and Co, M denotes metalloid elements, principally B, and wherein 0.02<y<0.15, and 5<z<9), to obtain permanent magnets with high orientation properties through the formation of 50-1000 .mu.m crude grains by spraying the alloys in a hot melt state using an inert gas atomization process, forming grains of less than 30 .mu.m by a mechanical pulverizing process after crystal texture in the crude grains has grown to over 30 .mu.m granules by a heat-treatment of the crude grains in a vacuum or in an inert atmosphere below 1000.degree. C., whereupon the grain powder is compression molded and heat treated at 500.degree.-900.degree. C. under a magnetic field to yield a compacted powder permanent magnet.

REFERENCES:
patent: 4585473 (1986-04-01), Narasimhan et al.

Affiliated with

Also associated with

Rating

Method for manufacturing permanent 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 for manufacturing permanent magnets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing permanent magnets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-176117