| 摘要 |
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.
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