论文标题
使用EBSD和修改的词典索引方法，在四方ZRO2中解析假性对称
Resolving pseudosymmetry in tetragonal ZrO2 using EBSD with a modified dictionary indexing approach
论文作者
论文摘要
伪对称性的分解长期以来对电子反向散射（EBSD）提出了挑战，并且众所周知，在四方ZRO2的情况下，人们一直在挑战。在这项工作中，提出了一种方法来通过构建字典索引方法来解决伪对称性，并通过将全局优化的应用用于拟合准确的模式中心，将霍夫索引方向聚集以将字典聚焦于方向空间中，并插入以提高索引索引解决方案的准确性。提出的方法被证明可以在四方ZRO2的模拟模式中以100％精度解析假性对称性，即使使用高度的嵌入和噪声。然后，该方法用于索引实验数据集，该数据集确认其有效，准确地解决这些材料中的假对称性的能力。目前的方法可以应用于在多种材料中解析假性对称性，甚至比四方ZRO2更具挑战性。此实施的源代码可在线获得。
Resolving pseudosymmetry has long presented a challenge for electron backscatter diffraction (EBSD) and has been notoriously challenging in the case of tetragonal ZrO2 in particular. In this work, a method is proposed to resolve pseudosymmetry by building upon the dictionary indexing method and augmenting it with the application of global optimization to fit accurate pattern centers, clustering of the Hough-indexed orientations to focus the dictionary in orientation space, and interpolation to improve the accuracy of the indexed solution. The proposed method is demonstrated to resolve pseudosymmetry with 100% accuracy in simulated patterns of tetragonal ZrO2, even with high degrees of binning and noise. The method is then used to index an experimental dataset, which confirms its ability to efficiently and accurately resolve pseudosymmetry in these materials. The present method can be applied to resolve pseudosymmetry in a wide range of materials, possibly even some more challenging than tetragonal ZrO2. Source code for this implementation is available online.
