Rare earth magnets and alloy powder for rare earth magnets and t

Details Rare earth magnets and alloy powder for rare earth magnets and t Rare earth magnets and alloy powder for rare earth magnets and t

1994-11-30

1996-08-13

Wyszomierski, George

Metal treatment

Stock

Magnetic

420 83, 420121, 252 6254, H01F 104

Patent

active

055452663

ABSTRACT:
For the purpose of establishing the manufacturing method to obtain the Fe.sub.3 B type Fe--Co--B--R--M system high performance resin bonded magnet which possesses improved iHc and (BH)max and can be reliably mass produced, the specific composition of Fe--Co--B--R (Pr, Nd)--M(Ag, Al, Si, Ga, Cu, Au) type molten alloy was rapidly solidified by the melt-quenching or atomization methods, or a combination of the two methods to obtain more than 90% of the solid in an essentially amorphous structure. After the temperature was raised at the rate of 1.degree..about.15.degree. C./min., the alloy was heat treated at 550.degree..about.730.degree. C. for 5 minutes.about.6 hours to obtain Fe-rich the boron compound phase, which crystallizes the body centered tetragonal Fe.sub.3 P type crystalline structure, and the Nd.sub.2 Fe.sub.14 B type crystalline structure phase both coexisting as fine crystalline clusters of the average crystalline diameter of 5 nm.about.100 nm. The alloy powder which contains the ferromagnetic phase, where the boron compound phase and the Nd.sub.2 Fe.sub.14 B type phase coexist, is combined with resin to produce the high performance resin bonded magnet with iHc.gtoreq.3 kOe, Br.gtoreq.5 kG, and (BH)max.gtoreq.3 MGOe.

REFERENCES:
patent: 4402770 (1983-09-01), Koon
patent: 4881989 (1989-11-01), Yoshizawa et al.
patent: 5250206 (1993-10-01), Nakayama et al.
patent: 5395462 (1995-03-01), Takeshita et al.

Affiliated with

Also associated with

Rating

Rare earth magnets and alloy powder for rare earth magnets and t does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rare earth magnets and alloy powder for rare earth magnets and t, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rare earth magnets and alloy powder for rare earth magnets and t will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1045600