Hostname: page-component-76fb5796d-dfsvx Total loading time: 0 Render date: 2024-04-25T07:00:52.951Z Has data issue: false hasContentIssue false
  • English
  • Français

Role of Chemical Disordering In Eleci3O Irradiation Induced Amorphisation

Published online by Cambridge University Press:  26 February 2011

D.E. Luzzi ,
H. Mori ,
H. Fujita  and
M. Meshii
D.E. Luzzi
Affiliation:
Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, Yamada-oka, Suita, Osaka 565 JAPAN Materials Research Center and Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60201
H. Mori
Affiliation:
Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, Yamada-oka, Suita, Osaka 565 JAPAN
H. Fujita
Affiliation:
Research Center for Ultra-High Voltage Electron Microscopy, Osaka University, Yamada-oka, Suita, Osaka 565 JAPAN
M. Meshii
Affiliation:
Materials Research Center and Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60201
Get access

Abstract

The electron irradiation induced crystalline to amorphous (C-A) transition was investigated in the Cu-Ti alloy system. As the transition is found to be dose dependent, the energy accumulated during the irradiation must make the crystal lattice unstable with respect to the amorphous state. In this paper, two possibilities for this energy accumulation, chemical disordering and the accumulation of point defects, is examined using the intermetallic compound CuTi2. Also, the effect of deviations from stoichiometry on the C-A transition is investigated in the compound CuTi. The Bragg-Williams long-rang order parameter, S, was found to decrease with electron dose. The rate of this decrease decreased with increasing temperature. At a critical temperature, the maximum obtainable degree of chemical disordering critically decreased. This critical temperature coincided with the critical temperature for the C-A transition, favoring the chemical disordering as the primary driving force. In CuTi, the C-A transition was hindered when there existed a Cu-rich deviation from stoichiometry.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 51: Symposium A – Beam-Solid Interactions and Phase Transformations , 1985 , 479
Copyright
Copyright © Materials Research Society 1985

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. Thomas, G., Mori, H., Fujita, H. and Sinclair, R., Scripta Metall. 16, 489 (1982).Google Scholar
2. Mogro-Campero, A., Hall, E. L., Walter, J. L. and Ratkowski, A. J., in Metastable Materials Formation by Ion Implantation, edited by Picraux, S. T. and Choyke, W. J. (North-Holland, N.Y., 1982) p. 203.Google Scholar
3. Luzzi, D. E., Mori, H., Fujita, H. and Meshii, M. (unpublished).Google Scholar
4. Luzzi, D. E., Mori, H., Fujita, H. and Meshii, M., Scripta Metall. 18, 957 (1984).Google Scholar
5. Luzzi, D. E., Mori, H., Fujita, H. and Meshii, M., Scripta Metall. 19, 897 (1985).Google Scholar
6. Luzzi, D. E., Mori, H., Fujita, H. and Meshii, M., Acta Metall. (in press).Google Scholar
7. Carpenter, G. J. C. and Schulson, E. M., Scripta Metal. 15, 549 (1981).Google Scholar
8. Hameed, M. Z., Smallman, R. E. and Loretto, M. H., Phil. Mag. A 46, 237 (1982).Google Scholar
9. Liu, H. C. and Mitchell, T. E., Acta Metall. 31, 863 (1983).Google Scholar
10. Banerjee, S., Urban, K. and Wilkens, M., Acta Metall. 32, 299 (1984).Google Scholar
11. Carpenter, G. J. C. and Schulson, E. M., J. Nucl. Mater. 23, 180 (1978).Google Scholar
12. Oen, O. S., ORNL Report No. 4897, 1973).Google Scholar
13. Jung, P., Chaplin, R. L., Fenzl, H. J., Reichelt, K. and Wombacher, P., Phys. Rev. B 8, 553 (1973).Google Scholar