快淬速度对Nd_2Fe_(14)B/α-Fe纳米晶双相复合稀土永磁材料相结构和磁性能的影响

Effect of rapid quenching speed on phase structure and magnetic properties of Nd_2Fe_(14)B/α-Fe two-phase composite nanocrystalline rare-earth permanent magnetic alloys

采用熔体快淬法在不同快淬速度下制备了Nd8Fe86B6合金中Nd2Fe14B/α-Fe双相复合纳米晶薄带.用X射线衍射仪(XRD)和振动样品磁强计(VSM)测量了薄带的相结构和磁性能.结果表明:Nd8Fe86B6合金的最佳快淬速度为18 m/s,在此条件下制备的合金薄带平均晶粒尺寸细小,综合磁性能好;合金薄带的平均晶粒尺寸为24.4 nm,磁性能为Br=0.69 T,Br/Bs=0.66,Hc=296.1 kA/m.

Formation of phase structure for Nd8 Fe86 B6 nanocrystalline alloys at different speed of rapid quenching was studied. The X-ray diffractometry（XRD） and vibrating sample magnetometer（VSM） were performed in order to investigate the structure and the magnetic properties. When speed of rapid quenching was at 18 m/s,the average grain size of Nd8Fe86B6 alloy ribbons was uniform,petty and the best magnetic properties were achieved. The average grain size of Nd8Fe86B6 alloy ribbons was 24.4 nm and the best magnetic properties of Br,Br/Bs ,Hc were 0.69 T,0.66 and 296.1 kA/m,respectively.