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Detection of Near-Surface 52Cr Segregation in Irradiated 51V(Cr) By Rbs*

Published online by Cambridge University Press:  26 February 2011

L. E. Rehn  and
P. M. Baldo
L. E. Rehn
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
P. M. Baldo
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
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Abstract

Irradiation at elevated temperatures of V(Cr) alloys is known to create a near-surface layer of nonequilibrium Cr enrichment. Highly reproducible RBS spectra were accumulated from a V-15%Cr alloy irradiated at 750°C, and from unirradiated portions of the same specimen. Differences between these spectra are used to demonstrate the high sensitivity of conventional RBS techniques for determining near-surface segregation behavior. Sensitivities obtained utilizing differences in the acquired spectra are much higher than those typically assumed for RBS measurements. Using 1.8 MeV 4He, and conventional RBS equipment and scattering geometries, segregation of < two atomic layers of 52Cr in 51V- 15at.%Cr over a depth of ∼5 nm has been observed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 82: Symposium I – Characterization of Defects in Materials , 1986 , 499
Copyright
Copyright © Materials Research Society 1987

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Footnotes

*

Work supported by the U. S. Department of Energy, BES-Materials Sciences, under Contract W-31-109-Eng-38.

References

REFERENCES

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