Hostname: page-component-8448b6f56d-mp689 Total loading time: 0 Render date: 2024-04-24T15:52:21.586Z Has data issue: false hasContentIssue false
  • English
  • Français

Mechanisms of Cascade Collapse

Published online by Cambridge University Press:  28 February 2011

T. Diaz de la Rubia ,
K. Smalinskas ,
R.S. Averback ,
I.M. Robertson ,
H. Hseih  and
R. Benedek
T. Diaz de la Rubia
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign
K. Smalinskas
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign
R.S. Averback
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign
I.M. Robertson
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign
H. Hseih
Affiliation:
Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign
R. Benedek
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, I1. 60439
Get access

Abstract

The spontaneous collapse of energetic displacement cascades in metals into vacancy dislocation loops has been investigated by molecular dynamics (MD) computer simulation and transmission electron microscopy (TEM). Simulations of 5 keV recoil events in Cu and Ni provide the following scenario of cascade collapse: (i) atoms are ejected from the central region of the cascade by replacement collision sequences; (ii) the central region subsequently melts; (iii) vacancies are driven to the center of the cascade during resolidification where they may collapse into loops. Whether or not collapse occurs depends critically on the melting temperature of the metal and the energy density and total energy in the cascade. Results of TEM are presented in support of this mechanism.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 138: Symposium Q – Characterization of the Structure and Chemistry of Defects in Materials , 1988 , 29
Copyright
Copyright © Materials Research Society 1989

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

1.see, e.g., English, C.A. and Jenkins, M.L., Mats. Science Forum, 15–18, 1003 (1987).Google Scholar
2. Averback, R.S. and Seidman, D.N., Mats. Science Forum, 15–18, 963 (1987)CrossRefGoogle Scholar
3. SUPERGLOB was originally developed by Prof. Beeler, J.R. Jr at North Carolina State University.Google Scholar
4. King, W.E. and Benedek, R., J. Nucl. Mater. 117, 26 (1983).Google Scholar
5. Gibson, J.B., Goland, A.N., Milgram, M. and Vineyard, G.H., Phys. Rev. 120, 1229 (1960).Google Scholar
6. Erginsoy, C., Vineyard, G.H. and Englert, A., Phys. Rev. 120, 1229 (1960).Google Scholar
7. Johnson, R.A., Phys. Rev. 145, 423 (1966).CrossRefGoogle Scholar
8. Daw, M.S. and Baskes, M.I., Phys. Rev. B29, 6443 (1984).Google Scholar
9. Rubia, T. Diaz de la, Averback, R.S., Benedek, R. and King, W.E., Phys. Rev. Lett. 59, 1930 (1987).Google Scholar
10. Foiles, S., Phys. Rev. B32, 3409 (1985).Google Scholar
11. Protasov, V.I. and Chudinov, V.G., Radiat. Effs. 66, 1 (1982).Google Scholar
12. Hsieh, H., Averback, R.S. and Benedek, R., unpublished result.Google Scholar
13. Adams, J., private communicationGoogle Scholar
14. Saldin, D.K., Stathopoulos, A.Y. and Whelan, M.J., Phil. Trans. Roy. Soc. 292, 513 (1979).Google Scholar