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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Structure model for the tau(mu) phase in Al-Cr-Si alloys deduced from the lambda phase by the strong-reflections approach.
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Structure model for the tau(mu) phase in Al-Cr-Si alloys deduced from the lambda phase by the strong-reflections approach.

机译：Al-Cr-Si合金中的tau（mu）相的结构模型，通过强反射法从λ相推导出。

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摘要

There are very obvious common features in the electron diffraction patterns of the lambda and tau(mu) phases in the Al-Cr-Si system. The positions of the strong reflections and their intensity distributions are similar for the two structures. The relation of the reciprocal lattices of the lambda and tau(mu) phases is studied. By applying the strong-reflections approach, the structure factors of tau(mu) are deduced from the corresponding structure factors of the known lambda phase. Rules for selecting reflections for the strong-reflections approach are described. Similar to that of lambda, the structure of tau(mu) contains six layers stacked along the c axis in each unit cell. There are 752 atoms in each unit cell, 53 of them are unique. The corresponding composition of the tau(mu) model is Al(3.82 - x)CrSi(x). Simulated electron diffraction patterns from the structure model are in good agreement with the experimental ones. The arrangement of interpenetrated icosahedral clusters in the tau(mu) phase is discussed.
机译：在Al-Cr-Si系统中，λ和tau（mu）相的电子衍射图具有非常明显的共同特征。对于这两种结构，强反射的位置及其强度分布是相似的。研究了λ相和tau（mu）相的倒易晶格的关系。通过采用强反射方法，从已知的λ相的相应结构因子推导出tau（mu）的结构因子。描述了为强反射方法选择反射的规则。与lambda相似，tau（mu）的结构在每个晶胞中包含沿c轴堆叠的六层。每个晶胞中有752个原子，其中53个是唯一的。 tau（mu）模型的相应组成是Al（3.82-x）CrSi（x）。结构模型模拟的电子衍射图谱与实验结果吻合良好。讨论了互穿的二十面体簇在tau（mu）相中的排列。

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