Grain boundary faceting-roughening in Zn

被引:0
|
作者
B. B. Straumal
A. S. Gornakova
V. G. Sursaeva
机构
[1] Russian Academy of Sciences,Institute of Solid State Physics
来源
Crystallography Reports | 2009年 / 54卷
关键词
Grain Boundary; Crystallography Report; Twin Boundary; Misorientation Angle; Coincidence Site Lattice;
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中图分类号
学科分类号
摘要
The change in the grain-boundary (GB) shape with an increase in temperature near the GB faceting-roughening phase transition has been studied. The GB facet length decreases with an increase in temperature to complete facet disappearance. The facet orientation is determined by the constrained coincidence site lattice (CCSL). Facets are located along close-packed CCSL planes. Above the roughening temperature TR, the tangents to the faceted and rough GB portions at the point of emergence of the first-order ridge are located along the close-packed CCSL planes (as facets below TR). The faceting-roughening phase transition is reversible. The presence of temperature hysteresis is indicative of first-order phase transition.
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页码:1070 / 1078
页数:8
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