EP 0542529 B1 19960731 - Method of making alloy powders of the RE-Fe/Co-B-M-type and bonded magnets containing this alloy powder
Title (en)
Method of making alloy powders of the RE-Fe/Co-B-M-type and bonded magnets containing this alloy powder
Title (de)
Verfahren zur Herstellung von Legierungspulvern des SE-Fe/Co-B-M-Typs und gebundene Magnete mit diesem Legierungspulver
Title (fr)
Procédé de fabrication de poudre en alliage à TR-Fe/Co-B-M et aimants liés à poudre en ce alliage
Publication
Application
Priority
- JP 32377991 A 19911111
- JP 9378092 A 19920319
- JP 12418092 A 19920416
- JP 17476792 A 19920608
- JP 17619992 A 19920609
Abstract (en)
[origin: EP0542529A1] For the purpose of establishing the manufacturing method to obtain the Fe3B 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 SIMILAR 15 DEG C/min., the alloy was heat treated at 550-730 DEG C for 5 minutes SIMILAR 6hours to obtain Fe-rich the boron compound phase, which crystallizes the body centered tetragonal Fe3P type crystalline structure, and the Nd2Fe14B type crystalline structure phase both coexisting as fine crystalline clusters of the average crystalline diameter of 5nm SIMILAR 100nm. The alloy powder which contains the ferromagnetic phase, where the boron compound phase and the Nd2Fe14B type phase coexist, is combined with resin to produce the high performance resin bonded magnet with iHc>/=3kOe,Br>/=5kG, and (BH)max>/=3MGOe.
IPC 1-7
IPC 8 full level
C22C 1/04 (2006.01); H01F 1/057 (2006.01)
CPC (source: EP)
C22C 1/0441 (2013.01); H01F 1/0571 (2013.01); H01F 1/0578 (2013.01)
Designated contracting state (EPC)
BE DE GB IT NL
DOCDB simple family (publication)
EP 0542529 A1 19930519; EP 0542529 B1 19960731; CN 1053988 C 20000628; CN 1085007 A 19940406; DE 69212569 D1 19960905; DE 69212569 T2 19970206
DOCDB simple family (application)
EP 92310299 A 19921111; CN 92114394 A 19921110; DE 69212569 T 19921111