Tweed microstructures: experimental observations and some theoretical models
Tweed microstructures: experimental observations and some theoretical models
复制标题
花呢微观结构：实验观察和一些理论模型
DOI：
10.1080/01411599408200355
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发表时间：
1994
影响因子：
1.6
通讯作者：
E. Salje
中科院分区：
文献类型：
--
作者：
A. Putnis;E. Salje
本文综述了矿物（钾长石和堇青石）、高温超导体（掺钴YBCO）和金属中粗花呢显微结构的实验观察，主要是用透射电子显微镜观察。粗花呢内的局部结构的结构模型进行了比较和评价，在一些系统的光谱测量。得出的结论是，在斜纹软呢微结构，这是由于对称性的变化驱动的阳离子有序，局部的有序度本身并不调制。一个模型的基础上孪生相关领域的低对称性形式是一致的实验观察。粗化的粗花呢显微组织形成的层状孪晶观察到的完全有序结构的机制进行了简要的评论。
Abstract Experimental observations, mainly by transmission electron microscopy, of tweed microstructures in minerals (K-feldspar and cordierite), high-T c superconductors (Co-doped YBCO) and metals are reviewed. Structural models of the local structure within the tweed are compared and evaluated with respect to spectroscopic measurements in a number of systems. It is concluded that in tweed microstructures which result from symmetry changes driven by cation-ordering, the local degree of order is not itself modulated. A model based on twin-related domains of the low symmetry form is consistent with experimental observations. Mechanisms of coarsening of the tweed microstructure to form the lamellar twinning observed in the fully ordered structure are briefly reviewed.