Coexistence of two different atomic structures in the σ13 pyramidal twin boundary in α-Al2O3

被引：4
作者：
Ishihara, Saki [1 ]
Tochigi, Eita [1 ,2 ]
Ishikawa, Ryo [1 ,2 ]
Shibata, Naoya [1 ,3 ]
Ikuhara, Yuichi [1 ,3 ,4 ]
机构：
[1] Univ Tokyo, Sch Engn, Inst Engn Innovat, Bunkyo Ku, Tokyo 1138656, Japan
[2] Precursory Res Embryon Sci & Technol, Japan Sci & Technol Agcy, Kawaguchi, Saitama, Japan
[3] Japan Fine Ceram Ctr, Nanostruct Res Lab, Nagoya, Aichi 4568587, Japan
[4] Kyoto Univ, Ctr Elements Strategy Initiat Struct Mat, Sakyo Ku, Kyoto 6068501, Japan
来源：
PHILOSOPHICAL MAGAZINE LETTERS | 2019年 / 99卷 / 12期
基金：
日本学术振兴会;
关键词：
Alumina; alpha-Al2O3; grain boundary; STEM; bicrystal; TILT GRAIN-BOUNDARIES; VACANCY FORMATION; BICRYSTALS; CHEMISTRY; ENERGIES; ALUMINA; DOPANT;
D O I：
10.1080/09500839.2019.1698780
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An alpha-Al2O3 bicrystal with a (104)/[110] sigma 13 grain boundary was fabricated by joining two pieces of single crystal at 1500 degrees C in an Ar-H-2 mixture gas. The resultant grain boundary was characterised by scanning transmission electron microscopy (STEM) at the atomic level. STEM observations revealed that the grain boundary consists of two regions with different atomic structures. These two structures were identified to be the most and second-most stable structures by theoretical calculations and STEM image simulation. The coexistence of two different structures in the sigma 13 grain boundary is discussed.
引用
收藏
页码：435 / 443
页数：9
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