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
樊思宁 1唐少龙1
作者信息
- 1. 南京大学物理学院,江苏南京 210093
- 折叠
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.
Abstract
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 enrich-ment 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 materi-als.
关键词
稀土永磁材料/高丰度稀土Y/微观结构/磁性能Key words
rare earth permanent magnet material/high abundance rare earth Y/microstructure/magnetic proper-ties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据