摘要
研究了微量合金元素 Nb 的添加对 Fe3B/Nd2Fe14B型纳米复合永磁体微观结构与磁性能的影响规律。结果表明,添加Nb元素可以稳定非晶相,阻碍Fe3B粒子的结晶动力学。Nd5.5Fe70.0Co5Cu0.5Nb0.5B18.5非晶合金在640℃退火处理 30min可获得最佳磁性能:Br=1.05T,jHc=367kA/m,(BH)max=80.2kJ/m3。Nb与Cu的复合添加对Fe3B晶粒的细化效果更显著;Nb元素的添加可以提高合金的磁性能,但添加量必须适中。
The microalloying effect of Niobium on the microstructure and magnetic properties of Fe3B/Nd2Fe14B nanocomposite permanent magnet has been investigated. As a result, Niobium addition stabilizes the amorphous phase and hinders the kinetics of the crystallization of the Fe3B particles. Niobium added in combination with Cu reduces grain size of Fe3B particles more remarkably than that without Niobium; with Niobium addition enhances magnetic properties of the alloy, but the amount must be suitable. Optimum magnetic properties with Br = 1.05T, jHc = 367 kA/m and (BH)max = 80.2 kJ/m3 were obtained by annealing a melt-spun Nd5.5Fe70.0Co5Cu0.5 Nb0.5B18.5 amorphous ribbon at 640°C for 30 min.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2005年第2期184-186,共3页
Journal of Functional Materials
基金
国家"十五"重点攻关资助项目(2002B A315A 6 5)
关键词
ND2FE14B
Fe3B
磁性能
纳米永磁
Crystallization
Differential thermal analysis
Doping (additives)
Grain size and shape
Magnetic properties
Microstructure
Nanostructured materials
Niobium
Niobium metallurgy
X ray diffraction analysis
