Takahashi Jun, Kawakami Kazuto, Yamaguchi Yukiko, Sugiyama Masaaki
Advanced Technology Research Labs., Nippon Steel Corporation, 20-1 Shintomi, Futtsu-city, Chiba 293-8511, Japan.
Ultramicroscopy. 2007 Sep;107(9):744-9. doi: 10.1016/j.ultramic.2007.02.008. Epub 2007 Feb 24.
More elaborated specimen preparation techniques for atom probe analysis were developed using a focused ion beam with a sample lift-out system so as to expand the application field in steel materials. The techniques enable atom probe analysis of sample steel at site-specific regions of interest. The preferable form of the needle specimen was provided by electrostatic field calculation using a finite element method. The new techniques were applied to the observation of a bainite-ferrite interface in a low carbon steel, and atomic-scale partitioning and segregation of alloying elements at the phase interface were directly observed in three dimensions.
利用带有样品取出系统的聚焦离子束，开发了更精细的用于原子探针分析的样品制备技术，以扩大其在钢铁材料中的应用领域。这些技术能够对感兴趣的特定部位的样品钢进行原子探针分析。通过使用有限元方法进行静电场计算，得到了理想的针状样品形式。将这些新技术应用于低碳钢贝氏体-铁素体界面的观察，直接在三维空间中观察到了合金元素在相界面处的原子尺度的分配和偏析。
