CAJ | 학술논문

对Nd33.0Fe65.9-xNbxB1.1(wt%,x=0,0.3,0.6,1.0,1.5,2.0)系列烧结永磁体的磁性能、组织形貌以及磁性能与组织形貌间的关系进行了系统研究.研究发现，不含Nb的NdFeB磁体晶粒的大小、形状差异非常大.这种结构使NdFeB磁体的磁性能恶化.添加一定量的Nb元素后，磁体的组织结构变得均匀一致.当Nb含量小于1.0时磁体矫顽力、剩磁、磁能积均比相应不含Nb的磁体高.其原因是Nb使NdFeB磁体的晶粒变得均匀一致，密度提高.Nb对NdFeB磁体的绝大部分磁性能的影响均与Nb使NdFeB磁体的晶粒得到均匀化有关.
대Nd33.0Fe65.9-xNbxB1.1(wt%,x=0,0.3,0.6,1.0,1.5,2.0)계렬소결영자체적자성능、조직형모이급자성능여조직형모간적관계진행료계통연구.연구발현，불함Nb적NdFeB자체정립적대소、형상차이비상대.저충결구사NdFeB자체적자성능악화.첨가일정량적Nb원소후，자체적조직결구변득균균일치.당Nb함량소우1.0시자체교완력、잉자、자능적균비상응불함Nb적자체고.기원인시Nb사NdFeB자체적정립변득균균일치，밀도제고.Nb대NdFeB자체적절대부분자성능적영향균여Nb사NdFeB자체적정립득도균균화유관.
The magnetic properties and microstructures of a series of sintered magnets Nd33.0Fe65.9-xNbxB1.1(wt%,x=0,0.3,0.6,1.0,1.5,2.0) as well as their relations were investigated in detail. It was found that the grain size of NdFeB magnet without Nb addition was quiet different from each other and the shape of the grains was very irregular, which led to the deterioration of the magnetic properties. The microstructures of the magnets with proper Nb addition became homogeneous and the final size of the grain after annealing was very fine, and, correspondingly, the density of the final magnet was increased to a higher level. Magnetic measurements showed that the coercivity iHc, magnetic remanence Br and energy product (BH)max of the magnet with Nb additions below 1.0wt% were generally higher than those of their Nb-free counterparts. The effect of Nb on the magnetic properties originated mainly from the homogenization of the microstructure due to Nb addition.