Preparation of metal thin foils for high resolution TEM characterization

被引：0
|
作者：
Bai H. [1 ]
Wang H. [1 ]
Liang L. [1 ]
Liu Y. [2 ]
Shen X. [3 ]
Wen Y. [1 ]
机构：
[1] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing
[2] School of Materials Science and Engineering, Xiangtan University, Xiangtan
[3] Institute of Physics, Chinese Academy of Sciences, Beijing
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2020年 / 51卷 / 11期
关键词：
Ion milling; Magnetic sample; Preparation of TEM sample; Surface oxide; Twin-jet electropolish;
D O I：
10.11817/j.issn.1672-7207.2020.11.020
中图分类号：
学科分类号：
摘要：
The thin foils of different alloys such as precipitate-hardened steels, Hastelloy alloys and CoCrNi medium-entropy alloys were prepared. The selection principles were analyzed. The best parameters for twin-jet electropolishing and the rules for TEM observation of steels were summarized to minimize their magnetic influence. Furthermore, a two-step ion milling process was used to remove surface oxides. The method to recognize and differentiate surface oxides for TEM observation was proposed. The results show that adopting the selection principles of twin-jet electropolishing and reducing the initial thickness of the sample can get large area and low-magnetic metal thin foils. At different aging time and using different preparation methods, the irregularly changed diffraction spots are from oxides. The method can be used to eliminate the influence of oxide diffraction spots. © 2020, Central South University Press. All right reserved.
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页码：3169 / 3177
页数：8
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