Crystallographic alignment evolution and magnetic properties of Nd-Fe-B nanoflakes prepared by surfactant-assisted ball milling
Crystallographic alignment evolution and magnetic properties of Nd-Fe-B nanoflakes prepared by surfactant-assisted ball milling
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DOI：
10.1063/1.3679414
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发表时间：
2012-03
影响因子：
3.2
通讯作者：
M. Yue;R. Pan;R. M. Liu;W. Liu;Dongtao Zhang;J. Zhang;Xuefeng Zhang;Zhanhu Guo;Wei Li
中科院分区：
文献类型：
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作者：
M. Yue;R. Pan;R. M. Liu;W. Liu;Dongtao Zhang;J. Zhang;Xuefeng Zhang;Zhanhu Guo;Wei Li
以正庚烷和油酸为球磨介质，采用表面活性剂辅助高能球磨法（HEBM）制备了Nd-Fe-B纳米片，并对其微观结构、晶体结构和磁性能进行了研究。用扫描电子显微镜、x射线衍射仪和振动样品磁强计分别对纳米片的微观结构、晶体结构和磁性能进行了研究。系统研究了球磨时间对Nd-Fe-B纳米片的c轴取向和矫顽力的影响。显微结构观察表明，Nd-Fe-B纳米片的平均厚度为几十纳米，平均直径在500 ~ 1000 nm之间，长径比高达100。随着球磨时间从2 h增加到12 h，表征Nd 2Fe 14 B相c轴晶体织构程度的（006）和（105）反射峰的强度比逐渐下降，表明长时间球磨破坏了Nd 2Fe 14 B相的织构。
The microstructure, crystal structure, and magnetic properties were studied for Nd-Fe-B nanoflakes prepared by surfactant-assisted high-energy ball milling (HEBM) with heptane and oleic acid as the milling medium. The microstructure, crystal structure, and magnetic properties of the nanoflakes were examined with scanning electronic microscopy, x ray diffraction, and vibrating sample magnetometer, respectively. Effect of ball-milling time on the c-axis crystallographic alignment and coercivity of Nd-Fe-B nanoflakes were systematically investigated. Microstructure observation shows that the Nd-Fe-B nanoflakes have an average thickness of tens of nanometers, an average diameter in the range of 500 ∼ 1000 nm, and an aspect ratio as high as 100. As the ball-milling time increases from 2 h to 12 h, the intensity ratio between (006) and (105) reflection peaks, which indicates the degree of c-axis crystal texture of the Nd2Fe14B phase, drops gradually, indicating that the long time-milling process undermines the ...