摘要
采用快淬后真空晶化处理的方法制备出纳米晶复合合金Nd9.5Fe76-xCo5Zr3CuxB6.5(x=0～2),系统地研究了Cu元素对其磁性能的影响。结果表明:适量Cu元素的添加,可以提高磁体的剩磁Br、内禀矫顽力jHc和最大磁能积(BH)max,并且可以有效地提高磁体的剩磁温度系数α,但使磁体的矫顽力温度系数β略有降低。当Cu含量为0.25 at%时,该磁体具有最佳的综合磁性能:(BH)max=79 kJ/m3,jHc=685 kA/m,Br(T)=0.713 T;剩磁温度系数α20～150℃=0.071%/℃;矫顽力温度系数β20～150℃=0.36%/℃。
Nanocomposite Nd9.5Fe76-xCo5Zr3CuxB6.5（x=0～2） magnets were prepared by melt spun and then annealing.The effect of Cu element on magnetic properties of the magnets was investigated.The results showed that the appropriate addition of Cu could improve the remanence,the coercivity and the maximum energy product;and it could also improve the temperature stability of the remanece,but it had little degradation on the temperature stability of the coercivity.The optimum magnetic properties of（BH）max=79 kJ/m3,jHc=685 kA/m,Br（T） =0.713 T,α20～150℃=-0.071 %/℃,β20～150℃=-0.36 %/℃ were obtained when the Cu content was 0.25 at% in Nd9.5Fe75.75Co5Zr3Cu0.25B6.5 bonded magnet.
出处
《上海金属》
CAS
2011年第4期15-18,32,共5页
Shanghai Metals
基金
国家自然科学基金资助(51071099)
上海市重点学科建设项目资助(S30107)
关键词
纳米晶复合
粘结磁体
Cu元素
温度系数
磁性能
Nanocomposite
Bonded Magnet
Cu Element
Temperature Coefficient
Magnetic properties
