Skip to main content Accessibility help
×
Home

Quantitative High-Resolution Electron Microscopy of Grain Boundaries in α-Al2O3

  • T Höche (a1), P. R. Kenway (a1), H.-J. Kleebe (a1) and M. Rühle (a1)

Abstract

Detailed structural characterization of a near Σ11 grain boundary in ultra-pure α-A12O3 bi-crystals was performed by means of high-resolution transmission electron microscopy (HRTEM). High-resolution imaging revealed a characteristic periodic pattern along the grain boundary. In addition to HRTEM studies, atomistic simulations based on an ionic model were used to calculate three-dimensional structure models that were compared with the experimentally obtained images of the grain boundary. The comparison between the simulated and experimental HRTEM images showed good agreement for the theoretically proposed grain-boundary structure with the lowest grain-boundary energy of 1.8 Jm−2.

Copyright

References

Hide All
1. Cannon, R.M., Rhodes, W.H. and Heuer, A.H., J. Am. Ceram. Soc. 63,46 (1980).
2. Priester, L. and Lartigue, S., J. Europ. Ceram. Soc. 8,47 (1991).
3. Moya, E. and Moya, F., in Non-stoichiometric Compounds, Surfaces, Grain Boundaries and Structural Defects, edited by Nowotny, J. and Weppner, W. (Kluwer Academic Press, Rottach-Egern, 1988), p.363
4. Kronberg, M. L., Acta Met. 5, 507 (1957).
5. Chan, I.-W., and Xue, L.A., J. Am. Ceram. Soc. 73, 2585 (1990).
6. Morris, P.A., PhD thesis, M.I.T. Cambidge, MA, 1986.
7. Harding, J.H., Report No. R 13127,AERE Harwell Laboratory, 1988.
8. Stadelmann, P.A., Ultramicroscopy 21, 131 (1987).
9. Möbus, G., Necker, G., and Rühle, M., Ultramicroscopy (in press).
10. Fortunée, R.P., M.S. thesis, Case Western Reverse University, 1981.
11. Born, M. and Huang, K., Dynamical Theory of Crystal Lattices, (Oxford University Press, Oxford, 1954).
12. Dick, B.G. and Overhauser, A.W., Phys. Rev., 90, 112, (1958).

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed