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An Examination of the Factors Which Determine the Thermal Spike Lifetime of a Displacement Cascade

Published online by Cambridge University Press:  16 February 2011

D.K. Tappin ,
I.M. Robertson  and
M.A. Kirk
D.K. Tappin
Affiliation:
Now at: School of Metallurgy and Materials, University of Birmingham, Birmingham, U.K.
I.M. Robertson
Affiliation:
Department of Materials Science and Engineering, University of Illinois, Urbana, IL, USA
M.A. Kirk
Affiliation:
Argonne National Laboratory, Argonne, IL., USA
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Abstract

The thermal spike phase of a displacement cascade is thought to be of fundamental importance to a number of issues in radiation effects. For example, the formation of stable vacancy clusters and the efficiency of ion mixing are thought to be directly controlled by the duration of the liquid-like state during the thermal spike. A number of factors have been proposed to be of significance to the lifetime of the thermal spike. For example, materials which have a high melting temperature, or which exhibit strong electron-phonon coupling, which provides an efficient method of energy transport to the surrounding material, are expected to have short lifetimes. We have examined these factors in detail and demonstrated that, in both elemental metals and alloys, electron-phonon coupling provides the most consistent explanation for variations in the thermal spike lifetime and, hence, the efficiency of ion mixing and the number of stable vacancy defect clusters formed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 373: Symposium Y – Microstructure of Irradiated Materials , 1994 , 41
Copyright
Copyright © Materials Research Society 1995

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References

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