论文部分内容阅读
构造了立方和不规则形状晶粒的各向异性纳米晶单相Pr2Fe14B磁体.利用微磁学的有限元法,模拟计算了样品的磁滞回线.计算结果表明,随着磁体晶粒易轴取向度的变差,磁体的剩磁、矫顽力均随之下降.不同晶粒尺寸的纳米晶单相Pr2Fe14B磁体,其磁性能随取向度的变化快慢不同,原因在于磁体中的晶间交换作用(IGEC)的强弱不同.随着晶粒取向度的提高,纳米晶单相磁体的矫顽力逐渐增加,这完全不同于烧结磁体.
The anisotropic nanocrystalline single phase Pr2Fe14B magnets with cubic and irregular shaped grains were constructed.The hysteresis loops of the samples were simulated by means of the micromagnetic finite element method.The calculated results show that with the easy axis The degree of orientation decreases and the remanence and coercivity of the magnets decrease.Different grain sizes of nanocrystalline single phase Pr2Fe14B magnets have different magnetic properties with different degrees of orientation due to the intergranular exchange (IGEC) is different.The coercivity of single-phase nanocrystalline magnets gradually increases with the increase of the degree of grain orientation, which is completely different from that of sintered magnets.