纳米金属沉积层对NdFeB磁粉及其磁体性能的影响

Effect of Nanometal Deposited Layers on Properties of NdFeB Powders and Magnets

摘要:

采用电化学方法在NdFeB磁粉表面沉积6种组合的单层或双层纳米厚度的金属层．测试了包覆磁粉的电极电位和磁性能，包覆磁粉制备的粘结磁体的电阻率。磁粉电极电位表现为NdFeB和沉积金属的混合电位。磁粉的磁性能变化与沉积金属的性质有关。磁体电阻率三月现为NdFeB和沉积金属的混合电阻率，沉积Zn/Ni双金属层的样品电阻率异常地增加．其矫顽力和最大磁能积均有不同程度的降低。

Abstract:

Six kinds of cladding combination of nanometal with one or two layers were electrodeposited on the surface of NdFeB powders. The electrode potential of those powders were measured to be a mixed potential combined NdFeB and deposited metals. It was shown that the properties of magnetic powder were related to the property of deposited metals. The resistivity of magnets showed the mixed resistivity of NdFeB and deposited metals. It was found that the resistivity of the sample deposited by the nano-Zn/Ni film increased abnormally, and its (BH)m and Hc decreased in various degrees.