Ground powders of Nd2Fe14B sintered magnets (particle size = 46-125 μm in diameter) were coated and alloyed by sorbing Yb metal vapor at 550-850°C. A significant recovery of remanence (B r), coercivity (Hcj and maximum energy product ((BH) max) values was observed in the resulting Yb/Nd2Fe 14B powders. The recovered values of 0.98 T, 712kA/m and 173kJ/m 3 for Br, Hcj and (BH)max, respectively, were obtained by optimizing the sorption and annealing conditions (800°C for 90min and 610°C for 60 min, respectively). The effects of temperature and sorption time on the magnetic properties of the recovered powders are discussed based on their microstructural characteristics.
|ジャーナル||Japanese Journal of Applied Physics, Part 2: Letters|
|出版ステータス||Published - 2003 7月 1|
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