Nd5Fe64B23Mo4Y4 bulk nanocomposite permanent magnets produced by crystallizing amorphous precursors
Nd5Fe64B23Mo4Y4 bulk nanocomposite permanent magnets produced by crystallizing amorphous precursors
复制标题
DOI：
10.1016/j.jnoncrysol.2012.01.041
复制
发表时间：
2012-04
影响因子：
3.5
通讯作者：
S. Tao;T. Ma;Zubair Ahmad;Hong Jian;M. Yan
中科院分区：
文献类型：
--
作者：
S. Tao;T. Ma;Zubair Ahmad;Hong Jian;M. Yan
研究了用铜模铸造法制备的Nd 5 Fe 68-xB 23 Mo 4 Yx（x=0，2，4，6）合金的非晶形成能力和磁性能。在Nd_5 Fe_（64）B_（23）Mo_（44）Y_（44）合金中获得了直径为2 mm的非晶棒。在1013 K下退火10 min后，Nd 5 Fe 64 B23 Mo 4 Y 4合金表现出最佳的硬磁性能，其矫顽力为764.2kA/m，剩磁为0.6T，最大能积为57.3kJ/m3。磁性增强的主要原因是磁体中的软磁α-Fe（25- 30 nm）、Fe_3B（30- 35 nm）和硬Nd_2Fe_（14）B（40- 50 nm）晶粒之间存在强烈的交换耦合。大尺寸块体纳米复合永磁材料具有良好的磁性能，使Nd-Fe-B-Mo-Y合金系统成为一种有希望的工业应用候选材料。
The glass forming ability and magnetic properties of Nd5Fe68−xB23Mo4Yx(x=0, 2, 4, 6) alloys prepared by copper mold casting technique have been studied. Amorphous rods with a diameter of 2mm were obtained in the Nd5Fe64B23Mo4Y4alloy. After annealing for 10min at 1013K, the Nd5Fe64B23Mo4Y4alloy showed optimal hard magnetic properties with the coercivity of 764.2kA/m, remanence of 0.6T and maximum energy product of 57.3kJ/m3, respectively. The enhanced magnetic properties can be ascribed to the strong exchange coupling among the magnetically soft α-Fe (25–30nm), Fe3B (30–35nm) and hard Nd2Fe14B (40–50nm) grains present in the magnet microstructure. Large size bulk nanocomposite magnets with sound magnetic properties make the Nd–Fe–B–Mo–Y alloy system a promising candidate for industrial applications.