Powder mixture for use in compaction to produce rare earth iron

Details Powder mixture for use in compaction to produce rare earth iron Powder mixture for use in compaction to produce rare earth iron

1994-12-27

1996-01-23

Sheehan, John

Specialized metallurgical processes, compositions for use therei

Compositions

Loose particulate mixture containing metal particles

252 6255, 428403, B22F 100

Patent

active

054862248

ABSTRACT:
To a fine R--Fe--B alloy powder comprised predominantly of 10-30 atomic % of R (wherein R stands for at least one element selected from rare earth elements including yttrium), 2-28 atomic % of B, and 65-82 atomic % of Fe in which up to 50 atomic % of Fe may be replaced by Co, at least one boric acid ester compound such as tributyl borate is added as a lubricant in a proportion of 0.01%-2% by weight and mixed uniformly before, during, or after fine grinding of the alloy powder. The resulting powder mixture is compacted by compression molding in a magnetic field and the green compacts are sintered and aged. Compression molding can be performed continuously without need of mold lubrication, and the resulting magnets have improved magnet properties with respect to residual flux density, maximum energy product, and intrinsic coercive force.

REFERENCES:
patent: 4597938 (1986-07-01), Matsuura et al.

Affiliated with

Also associated with

Rating

Powder mixture for use in compaction to produce rare earth iron does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Powder mixture for use in compaction to produce rare earth iron , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Powder mixture for use in compaction to produce rare earth iron will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1502398