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The Effect of Simultaneous Electron and Kr+ Irradiation on Amorphization of CuTi*

Published online by Cambridge University Press:  25 February 2011

J. Koike ,
P. R. Okamoto ,
L. E. Rehn  and
M. Meshii
J. Koike
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 Dept. of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
P. R. Okamoto
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
L. E. Rehn
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
M. Meshii
Affiliation:
Dept. of Materials Science and Engineering, Northwestern University, Evanston, IL 60208
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Abstract

CuTi was irradiated with 1-MeV electrons and Kr+ ions simultaneously at temperatures from 10 to 423 K. Retardation of Kr+-induced amorphization was observed with simultaneous electron irradiation at 295 and 423 K. The retardation effect increased with increasing irradiation temperature and relative electron-to-Kr dose rate. In contrast, simultaneous irradiation below 100 K showed an additive effect of electron- and Kr+-induced amorphization. The results can be explained by the mobility point defects introduced by electron irradiation interacting with Kr+-induced displacement cascades.

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Footnotes

*

The work is supported by DOE W-31-109-ENG-38 and NSF DMR-8411178.

References

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