论文标题
晶体方向和检测器距离对电子反向散射解决假性对称的影响
Crystal orientation and detector distance effects on resolving pseudosymmetry by electron backscatter diffraction
论文作者
论文摘要
精确的索引假对称材料长期以来对电子反向散射衍射具有挑战性。与传统的基于Hough的索引方法相比，基于强度的索引方法的最新出现有望增强解决伪对称的能力。但是，几乎没有做过了解样品位置和方向对解决假性对称能力的影响的工作，尤其是对于基于强度的索引方法。因此，在这项工作中，我们定量研究了晶体方向和检测器距离在模型四方ZRO2（C/A = 1.0185）材料中的影响。我们确定最简单，最难正确索引的方向，表征探测器距离对索引置信的影响，并根据衍射模式中特定区域轴的外观分析这些趋势。我们的发现还表明，使用基于强度的索引方法解决伪对称的检测器距离较短的距离具有明显的好处。
Accurately indexing pseudosymmetric materials has long proven challenging for electron backscatter diffraction. The recent emergence of intensity-based indexing approaches promises an enhanced ability to resolve pseudosymmetry compared to traditional Hough-based indexing approaches. However, little work has been done to understand the effects of sample position and orientation on the ability to resolve pseudosymmetry, especially for intensity-based indexing approaches. Thus, in this work we quantitatively investigate the effects of crystal orientation and detector distance in a model tetragonal ZrO2 (c/a=1.0185) material. We identify orientations that are easiest and most difficult to correctly index, characterize the effect of detector distance on indexing confidence, and analyze these trends based on the appearance of specific zone axes in the diffraction patterns. Our findings also point to the clear benefit of shorter detector distances for resolving pseudosymmetry using intensity-based indexing approaches.
