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首页> 外文期刊>Physica, A. Statistical mechanics and its applications >Crystallographic symmetry effect on the nucleation in non-equilibrium aggregation pattern
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Crystallographic symmetry effect on the nucleation in non-equilibrium aggregation pattern

机译：晶体对称性对非平衡聚集模式下成核的影响

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摘要

Some non-equilibrium patterns formed in different systems are composed by crystallites with correlations in their crystallographic orientation. This reflects the fact that crystallographic symmetry controls the successive nucleation in the crystallite aggregating process. Based on the crystallographic symmetry, a new classification to describe the different kinds of anisotropy for non-equilibrium aggregation pattern has been proposed: parallel aggregation, twin aggregation and radial (random) aggregation. This new classification can clarify the different anisotropy related to the crystal point group, which the previous classifications cannot. The nucleation mechanisms for these three kinds of patterns are also discussed based on the symmetric relationship among the crystallites. It is shown that the crystallographic symmetry plays an important role not only on the crystal polyhedral shape formed by growth, but also on the aggregation pattern formed by nucleation. (C) 2008 Elsevier B.V. All rights reserved.
机译：在不同系统中形成的一些非平衡图形是由微晶组成的，这些微晶在其晶体学取向上具有相关性。这反映了晶体对称性控制微晶聚集过程中连续成核的事实。基于晶体学对称性，提出了一种新的分类来描述非平衡聚集模式的不同种类的各向异性：平行聚集，孪生聚集和径向（随机）聚集。此新分类可以阐明与晶点组有关的不同各向异性，而先前的分类则不能。基于微晶之间的对称关系，还讨论了这三种图形的成核机理。结果表明，晶体对称性不仅在通过生长形成的晶体多面体形状上而且在通过成核形成的聚集图案上都起重要作用。 （C）2008 Elsevier B.V.保留所有权利。

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