Breen A J, Day A C, Lim B, Davids W J, Ringer S P
School of Aerospace, Mechanical & Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia; Australian Centre for Microscopy & Microanalysis, The University of Sydney, Sydney, NSW 2006, Australia.
School of Aerospace, Mechanical & Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia; Australian Centre for Microscopy & Microanalysis, The University of Sydney, Sydney, NSW 2006, Australia; Steam Instruments, inc. Madison, WI 53703, USA.
Ultramicroscopy. 2023 Jan;243:113640. doi: 10.1016/j.ultramic.2022.113640. Epub 2022 Oct 31.
Poles and zone lines observed within atom probe field evaporation images are useful for a range of atom probe crystallography studies, including calibration of the reconstruction and crystallographic characterisation of microstructural features such as grain boundaries. However, this information is not always readily apparent. Techniques for plotting crystallographically correlated metrics contained within atom probe data to enhance pole and zone line contrast across the detector space are developed. This includes consideration of the electric field, molecular ions, lattice structure retained within the reconstruction, specific elemental species, the number of pulses between detection events, and the lateral distance between sequential detection events. These approaches are then applied to experimental atom probe tomography datasets on technically pure Al, nanocrystalline Al, highly doped Si, and additively manufactured Inconel 738, Haynes 282, and Ti-6Al-4V. The results facilitate the extension of atom probe crystallography studies to a broader range of crystalline datasets where crystallographic information is not readily apparent from existing methods, as well as a deeper understanding of field evaporation behaviour during an atom probe experiment.
在原子探针场蒸发图像中观察到的极线和晶带线对于一系列原子探针晶体学研究非常有用，包括重建校准以及对诸如晶界等微观结构特征的晶体学表征。然而，这些信息并非总是一目了然。本文开发了用于绘制原子探针数据中包含的晶体学相关度量的技术，以增强探测器空间内极线和晶带线的对比度。这包括考虑电场、分子离子、重建中保留的晶格结构、特定元素种类、检测事件之间的脉冲数以及连续检测事件之间的横向距离。然后将这些方法应用于技术纯铝、纳米晶铝、高掺杂硅以及增材制造的Inconel 738、Haynes 282和Ti-6Al-4V的实验原子探针断层扫描数据集。这些结果有助于将原子探针晶体学研究扩展到更广泛的晶体数据集，在这些数据集中，现有方法难以直接获取晶体学信息，同时也有助于更深入地理解原子探针实验中的场蒸发行为。
