Crystal structure and magnetic properties of SmCo6.6Nb0.4 nanoflakes prepared by surfactant-assisted ball milling

稀土学报(英文版), 2013, (10): 975-978. doi: 10.1016/S1002-0721(12)60388-3

潘蕊 ^1, , 岳明 ^2, , 张东涛 ^3, , 高学绪 ^4, , 刘卫强 ^5, , 张久兴 ^6, , 郭朝辉 ^7, , 李卫 ^8,

1.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

2.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

3.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

4.State Key Lab of Advanced Metals and Materials, Univer-sity of Science and Technology Beijing, Beijing 100083, China

5.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

6.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

7.Division of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China

8.Division of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China

基金项目: the National Major Fundamental Research Program of China, Ministry of Science and Technology China(2010CB934600) the National High Technology Research and Development Program of China(2010AA03A402) the State Key Lab of Advanced Metals and Materials(2011-ZD02)

Crystal structure and magnetic properties of SmCo6.6Nb0.4 nanoflakes prepared by surfactant-assisted ball milling

PAN Rui ^1, , YUE Ming ^2, , ZHANG Dongtao ^3, , GAO Xuexu ^4, , LIU Weiqiang ^5, , ZHANG Jiuxing ^6, , GUO Zhaohui ^7, , LI Wei ^8,

1.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

2.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

3.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

4.State Key Lab of Advanced Metals and Materials, Univer-sity of Science and Technology Beijing, Beijing 100083, China

5.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

6.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China

7.Division of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China

8.Division of Functional Materials, Central Iron and Steel Research Institute, Beijing 100081, China

Keywords： SmCo6.6Nb0.4

SmCo6.6Nb0.4 nanoflakes with TbCu7 structure were successfully prepared by surfactant-assisted high energy ball milling (SA-HEBM) with heptane and oleic acid as milling medium. The microstructure, crystal structure and magnetic properties were stud-ied by scanning electron microscopy, X-ray diffraction, and vibrating sample magnetometer, respectively. The effects of ball milling time on the c-axis crystallographic alignment and coercivity of the nanoflakes were systematically investigated. The research showed that the nanoflakes had an average thickness of 100 nm, an average diameter of 1 μm, with an aspect ratio as high as 100. As the ball milling time increased from 2 to 8 h, the reflection peaks intensity ratio I(002)/I(101), which indicated the degree of c-axis crystal texture of the SmCo6.6Nb0.4 phase, increased first, reached a peak at 4 h, and then decreased. Meanwhile, the coercivity of the nanoflakes also increased first, reached a peak at 13.86 kOe for 4 h, and then decreased.

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