应用于EBSD从头索引的系统缺失分布规律和广义de Wolff优值
Distribution rules of systematic absence and generalized de Wolff figure of merit applied to EBSD ab-initio indexing
摘要：
对于EBSD从头索引，本文提出了一种新的方法，该方法综合了原来用于粉末索引的几种方法。采用系统缺额分布规则和误差稳定的布拉菲格点判定方法，消除了非可见波段的负面影响和可见波段的错误信息。此外，广义版本的德沃尔夫品质因数提出了一个新的排序标准所获得的晶胞参数，它可以用来在取向确定和从头索引从菊池图案。计算结果表明，新的品质因数工作良好，类似于原来的德沃尔夫$M_n$。索引解决方案的模糊性也指出，这发生在特别是低对称细胞，并可能产生多个不同的解决方案，即使非常准确的位置，带中心线和投影中心给出。
英文摘要：
For EBSD ab-initio indexing, a new method that adopts several methods originally invented for powder indexing, is reported. Distribution rules of systematic absence and error-stable Bravais lattice determination are used to eliminate negative influence of non-visible bands and erroneous information from visible bands. In addition, generalized versions of the de Wolff figures of merit are proposed as a new sorting criterion for the obtained unit-cell parameters, which can be used in both orientation determination and ab-initio indexing from Kikuchi patterns. Computational results show that the new figures of merit work well, similarly to the original de Wolff $M_n$. Ambiguity of indexing solutions is also pointed out, which happens in particular for low-symmetric cells, and may generate multiple distinct solutions even if very accurate positions of band center lines and the projection center are given.
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