Abstract
An alumina (α-Al2O3) bicrystal with a {1over(1, ̄) 0 0}/〈1 1over(2, ̄) 0〉 2° low-angle grain boundary was fabricated by diffusion bonding, and the grain boundary was observed by high-resolution transmission electron microscopy (HRTEM). It was found that 1/3〈1over(1, ̄) 0 0〉 partial-dislocation triplets were periodically arrayed along the boundary. The atomic structure within the {1over(1, ̄) 0 0} stacking faults in between the partial-dislocation triplets was determined by HRTEM combined with first-principles calculations. We discuss the stacking fault structures and their excess energies in detail.
Original language | English |
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Pages (from-to) | 208-215 |
Number of pages | 8 |
Journal | Acta Materialia |
Volume | 58 |
Issue number | 1 |
DOIs | |
Publication status | Published - 2010 Jan |
Externally published | Yes |
Keywords
- Alumina (α-AlO)
- Dislocation
- Grain boundary
- Stacking fault
- Transmission electron microscopy (TEM)
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Polymers and Plastics
- Metals and Alloys