稀土含量对Nd-Y-Fe-B合金结构及磁性能的影响  

Effect of rare earth content on the structure and magnetic properties of Nd-Y-Fe-B alloys

作　　者：樊思宁 唐少龙 FAN Sining;TANG Shaolong(School of Physics,Nanjing University,Nanjing 210093,Jiangsu,China)

机构地区：[1]南京大学物理学院,江苏南京210093

出　　处：《金属功能材料》2024年第6期98-102,共5页Metallic Functional Materials

基　　金：国家自然科学基金资助项目(11974172)。

摘　　要：采用熔融快淬及晶化退火处理研究了稀土含量对Nd-Y-Fe-B合金结构及磁性能的影响。随着合金中稀土含量的增加,晶化退火后合金中逐渐析出富稀土(RE-rich)晶界相。较高的稀土含量诱导Y元素富集在晶粒中,使富稀土合金中晶粒整体的Y含量提高。RE-rich相对矫顽力的有利作用和Y在晶粒富集对矫顽力的稀释作用共同影响了合金的矫顽力,导致合金矫顽力随稀土含量增加非线性提高。为新型烧结磁体前驱材料的设计制备提供了新的思路。The effect of rare earth(RE)content on the structure and magnetic properties of Nd-Y-Fe-B alloys was studied using rapid quenching and crystallization annealing.With the increase in RE content in the alloy,a RE-rich grain boundary(GB)phase gradually precipitates after crystallization annealing.Higher rare earth content induces the enrichment of Y in the grains,leading to an overall increase in the Y content in the grains of the RE-rich alloy.The combined influence of the beneficial effect of the RE-rich phase on coercivity and the dilution effect of Y enrichment in the grains on coercivity results in a nonlinear increase in the coercivity of the alloy with increasing rare earth content.This study provides new insights for the design and preparation of novel sintered magnet precursor materials.

关 键 词：稀土永磁材料 高丰度稀土Y 微观结构 磁性能 

分 类 号：TG1[金属学及工艺—金属学]