Metal treatment – Stock – Magnetic
Patent
1989-11-17
1991-04-30
Sheehan, John P.
Metal treatment
Stock
Magnetic
420 83, 420121, H01F 1053
Patent
active
050115529
ABSTRACT:
A rare earth metal-iron-boron permanent magnet is produced by a sintering method using a magnetic powder prepared from an ingot of R.sub.2 Fe.sub.14 B and another powder prepared from a rapidly-quenched alloy ribbon of R-T-B. R is least one element selected from the group consisting of yttrium and rare earth metals and T is at least one element selected from the group consisting of transition metals. During sintering almost all the rapidly-quenched alloy powder melts to form a liquidus phase which cements the magnetic particles at a sintering temperature. The liquidus phase generates a magnetic crystalline phase and a solid solution phase upon cooling from the sintering temperature. A comparatively large amount of rapidly-quenched alloy powder is used to produce a magnet having a reduced amount of solid solution phase. In addition to this, the rapidly-quenched alloy can readily be finely ground and the rapidly-quenched alloy powder can therefore be uniformly mixed with the magnetic alloy powder so that a magnet having excellent magnetic properties can be produced wherein the magnetic particles are uniformly dispersed in the small amount of the solid solution phase. The magnet also has a reduced oxygen content.
Otsuka Tsutomu
Otsuki Etsuo
Sheehan John P.
Tokin Corporation
LandOfFree
Method for producing a rare earth metal-iron-boron permanent mag 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 producing a rare earth metal-iron-boron permanent mag, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing a rare earth metal-iron-boron permanent mag will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-638575