Francis T Snyder

45633304, Jan 7, 1986

Sep 30, 1983

6/538026

Francis S. Snyder - Coraopolis PA

Crucible Materials Corporation - Pittsburgh PA

C22C 1907

420435

A magnet alloy which has a combination of high energy product and remanence, which magnet alloy consists essentially of, in weight percent, 10 to 30 samarium, 10 to 20 of an additional rare earth element selected from the group consisting of praseodymium and neodymium and the balance cobalt; iron and tin may also be added to the alloy.

49941097, Feb 19, 1991

May 5, 1989

7/347660

Carol J. Willman - Bethel Park PA
Edward J. Dulis - Pittsburgh PA
Francis S. Snyder - Coraopolis PA

Crucible Materials Corporation - Pittsburgh PA

H01F 1053
H01F 106

75338

A method for producing permanent magnet alloy particles suitable for use in producing bonded permanent magnets. A melt or molten mass of a permanent magnet alloy having at least one rare earth element, at least one transition element, preferably iron, and boron is produced. The melt is inert gas atomized to form spherical particles within the size range of 1 to 1000 microns. The particles are heat treated in a nonoxidizing atmosphere for a time at temperature to significantly increase the intrinsic coercivity of the particles without sintering the particles to substantially full density. Thereafter, the particles are separated to produce a discrete particle mass. The particles during heat treatment may be maintained in motion to prevent sintering thereof.