Structure and chemistry of symmetrical tilt grain boundaries in α-Al2O3:: I, bicrystals with "clean" interface

被引：42
作者：
Gemming, T
Nufer, S
Kurtz, W
Rühle, M
机构：
[1] Leibniz Inst Festkorper & Werkstofforsch Dresden, D-01171 Dresden, Germany
[2] Max Planck Inst Met Res, D-70569 Stuttgart, Germany
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2003年 / 86卷 / 04期
关键词：
D O I：
10.1111/j.1151-2916.2003.tb03344.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Several low-index symmetrical tilt grain boundaries in alpha-Al2O3 were investigated by combining high-resolution transmission electron microscopy and spatially resolved energy dispersive X-ray analysis. Bicrystals with a well-defined orientation relation and interface plane were produced by diffusion bonding under ultrahigh vacuum. Grain boundaries like the prismatic and rhombohedral twin develop an atomically sharp and clean interface, whereas higher index grain boundary (GB) planes show a more complex structure and are able to accommodate both Si and Ca in the interface. Additionally, it was found that asymmetric GB planes which occur as facets at rhombohedral and prismatic twins also accommodate impurity atoms.
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收藏
页码：581 / 589
页数：9
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