| 摘要 |
A permanent magnet alloy of a Nd-Fe-B composition having a major Nd2Fe14B permanent magnet phase, with alloying additions of cobalt, aluminum and zirconium, in combination. The permanent magnet alloy may be produced as prealloyed particles by inert gas atomization. The particles are magnetically aligned and consolidated, as by cold isostatic pressing, and then sintered within the temperature range of 950-1100 DEG C to produce a fully dense alloy article. After heating at a temperature within the range of 850 to 950 DEG C for 30 to 120 minutes, the article is cooled at a cooling rate of 5-50 DEG C/min. to a temperature of 400-550 DEG C and thereafter aged at a temperature within the range of 500-750 DEG C, preferably 550 to 700 DEG C. Prior to consolidating, the particles may be blended with zinc stearate and comminuted to reduce the size thereof.
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