稀土含量对快淬(Nd,Pr)_x(FeCoZr)_(94-x)B_6粘结磁体磁性能的影响Effect of Rare Earths Content on Magnetic Properties of (Nd,Pr)_x(FeCoZr)_(94-x)B_6 Bonded Magnets
刘颖,查五生,高升吉,连利仙,涂铭旌
摘要(Abstract)：
采用工艺参数范围较宽的部分过快淬加晶化退火工艺,制备了快淬(Nd0.8Pr0.2)x(FeCoZr)94-xB6(x=12 0,10.5,10 0,9.0)粘结磁体,研究了稀土含量对磁体磁性能的影响规律。部分过快淬获得的由非晶和微晶共同组成的条屑,在实验优化的退火条件下晶化处理后,可获得最佳磁性能。稀土含量直接决定磁体的磁性能,随稀土含量的减少,磁体的剩磁Br增加,而内禀矫顽力Hci和最大磁能积(BH)m下降,10%是磁体磁性能发生较大变化的临界稀土含量。低于这一含量,合金中软磁相体积分数超出软磁相被完全耦合的临界值,Br增加缓慢,Hci和(BH)m迅速下降。这一实验结果与本文提出的完全耦合软磁相体积分数示意模型的计算结果相一致。
关键词(KeyWords)： 金属材料;Pr基永磁材料;纳米晶复合磁体;稀土含量;磁性能;耦合模型;稀土
基金项目(Foundation): 国家863计划资助项目(2001AA324030)
作者(Author): 刘颖,查五生,高升吉,连利仙,涂铭旌
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