Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1988-03-22
1990-04-03
Rutledge, L. Dewayne
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148104, 148108, 164463, H01F 102
Patent
active
049137450
ABSTRACT:
A method is disclosed for producing a rare earth metal-transition metal-boron (R-T-B) bonded magnet with a magnetic anisotropy. R-T-B alloy ribbons and/or ribbon-like flakes containing R.sub.2 T.sub.14 B fine crystals are prepared with a thickness of 20-1,000 .mu.m by rapidly-quenching method. The ribbons and/or flakes are crushed and ground into a magnetic powder of particle sizes smaller than the value of the ribbon thickness. The magnetic powder is mixed with binder agent and formed into desired bulk-shape body in an aligning magnetic field to produce the bonded magnet with the magnetic anisotropy. In order to improve the magnetic properties, the ribbons and/or flakes can be heat-treated at a temperature of 650.degree.-950.degree. C. The magnetic powder can also be teat-treated at a temperature of 500.degree.-700.degree. C.
REFERENCES:
patent: 4558077 (1985-12-01), Gray
patent: 4743311 (1988-05-01), Schultz et al.
patent: 4810309 (1989-03-01), Coehoorn et al.
Herbst, J. F. et al., "Relationships Between Crystal Structure and Magnetic Properties in Nd.sub.2 Fe.sub.14 B," Physical Review B, 29, 4176, 1984.
Rutledge L. Dewayne
Tokin Corporation
Wyszomierski George
LandOfFree
Method for producing a rare earth metal-iron-boron anisotropic b 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 anisotropic b, 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 anisotropic b will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1355516