快淬速度对Nd9.5Fe76Zr3Co5B6.5纳米晶复合永磁合金磁性能和微观结构的影响

以Nd9.5Fe76Zr3Co5B6.5合金为研究对象,研究了不同快淬速度(8~65 m/s)对合金的磁性能、交换耦合作用和微观结构的影响。结果表明,快淬速度对合金退火后的微观结构和磁性能具有显著地影响,适当的快淬速度将使合金退火后的晶粒细化、分布均匀,提高软、硬磁性相间的交换耦合作用,进而提高合金的磁性能。当淬速为15 m/s时,合金退火后具有最佳的综合磁性能:Br=0.976 T,Hcj=711.57 kA/m,(BH)max=150.61 kJ/m3。

Effect of Wheel Speed on the Magnetic Properties and Microstructure of Nd9.5Fe76Zr3Co5B6.5 Nanocomposite Permanent Magnetic Alloys

The wheel speed is one of the key factors which affect the magnetic properties and microstructure of the nanocomposite permanent magnetic alloys. The effects of wheel speed on the magnetic properties and microstructure of the Nd9.5Fe76Zr3Co5B6.5 alloys were investigated. The results show that the magnetic properties and microstructure of the annealed Nd9.5Fe76Zr3Co5B6.5 alloys are sensitive to the wheel speed. The fine and uniform microstructure can be obtained after optimal annealing treatment at the appropriate wheel speed. The exchange-coupling interaction can also be enhanced, resulting in the improvement of the magnetic properties. The optimal magnetic properties obtained at the wheel speed of 15 m/s are: Br=0.976 T, Hcj=711.57 kA/m and (BH)max=150.61 kJ/m3.