Hostname: page-component-76fb5796d-22dnz Total loading time: 0 Render date: 2024-04-26T13:47:48.499Z Has data issue: false hasContentIssue false
  • English
  • Français

Dislocation Dissociation in MgQnAl2O3 Spinels

Published online by Cambridge University Press:  21 February 2011

H. Wendt ,
K. M. Ostyn  and
C. B. Carter
H. Wendt
Affiliation:
Department of Materials Science and Engineering Cornell University, Ithaca, NY 14853
K. M. Ostyn
Affiliation:
Department of Materials Science and Engineering Cornell University, Ithaca, NY 14853
C. B. Carter
Affiliation:
Department of Materials Science and Engineering Cornell University, Ithaca, NY 14853
Get access

Abstract

The structure of low-angle tilt boundaries in magnesium-aluminate spinel has been studied by transmission electron microscopy. Special low-angle boundaries have been prepared from bicrystals but also boundaries in polycrystalline spinels were studied. The dislocations were all dissociated into partials. Their dissociation widths were found to increase with deviation from stoichiometry. Observations at lattice dislocations indicate that the composition at the boundaries may be different from the nominal composition.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 24: Symposium B – Defect Properties and Processing of High-Technology Nonmetallic Materials , 1983 , 87
Copyright
Copyright © Materials Research Society 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Hornstra, J., J. Phys. Chem. Sol., 15, 311 (1960).CrossRefGoogle Scholar
2. Lewis, M. H., Phil. Mag. 17, 481 (1968).Google Scholar
3. Lewis, M. H., Phil. Mag. 20, 985 (1969).Google Scholar
4. Bansal, G. K., Heuer, A. H., Phil. Mag. 29, 709 (1973).CrossRefGoogle Scholar
5. Veyssiere, P., Rabier, J., Garem, H. and Grilhe, J., Phil. Mag. 38A, 61 (1978).Google Scholar
6. Hirth, J. P. and Lothe, J., Theory of Dislocations, McGraw-Hill (1968).Google Scholar
7. Doukhan, N., Duclos, R. and Escaig, B., J. De Physique, 34, 379 (1973).Google Scholar
8. Welsch, G., Hwang, L., Heuer, A. H. and Mitchell, T. E., Phil. Mag. 29, 1371 (1974).Google Scholar
9. Doukhan, N., Duclos, R. and Escaig, B., J. De Physique 40, 381 (1979).Google Scholar
10. Doukhan, N., Duclos, R. and Escaig, B., J. De Physique 35, 181 (1974).Google Scholar
11. Lewis, M. H., Phil. Mag. 17, 481 (1968).Google Scholar
12. Donlon, W. T., Mitchell, T. E. and Heuer, A. H., Phil. Mag. A40, 351 (1979).Google Scholar
13. Mitchell, T. E., Hwang, L. and Heuer, A. H., J. Mat. Science 11, 264 (1976).Google Scholar
14. Veyssiere, P., Rabier, J. and Grilhe, J., J. Mat. Science Letters 12, 620 (1977).Google Scholar