Zr segregation in alumina S31 grain boundary
-
- Mizoguchi Teruyasu
- The University of Tokyo
-
- Abe Eiji
- The University of Tokyo
-
- J.P. Buban
- The University of Tokyo
-
- Shibata Naoya
- The University of Tokyo
-
- Matsunaga Katsuyuki
- Kyoto University
-
- Yamamoto Takahisa
- The University of Tokyo JFCC NSRC
-
- Ikuhara Yuichi
- The University of Tokyo JFCC NSRC
Bibliographic Information
- Other Title
-
- Σ31アルミナ粒界におけるZrの偏析とAl空孔の影響
Abstract
Segregated dopants at grain boundary dramatically change the mechanical and electrical properties in materials. The knowledge of the behavior of these dopants is therefore a key for further material developments. Here, a Zr doped alumina (Al2O3) bicrystal was fabricated and the atomic structure of the grain boundary was characterized using scanning transmission electron microscopy (STEM). Zr was found to segregate to specific sites along the grain boundary, which were neighbored by Al columns of weak image intensity. First principles calculations and static lattice calculations revealed that the charge compensating Al vacancies are most stable in Al columns neighboring the location of the Zr sites. Multi-slice simulations of STEM images confirmed that Al columns containing vacancies exhibit a reduction in image intensity. These results give strong evidence that the associated Al vacancies are strongly influenced by the atomic site of Zr segregation.
Journal
-
- Preprints of Annual Meeting of The Ceramic Society of Japan<br> Preprints of Fall Meeting of The Ceramic Society of Japan
-
Preprints of Annual Meeting of The Ceramic Society of Japan<br> Preprints of Fall Meeting of The Ceramic Society of Japan 2008S (0), 1L23-1L23, 2008
The Ceramic Society of Japan
- Tweet
Keywords
Details 詳細情報について
-
- CRID
- 1390001205619620736
-
- NII Article ID
- 130006978840
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- CiNii Articles
-
- Abstract License Flag
- Disallowed