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Diffuse Scattering of X-Rays in Metals after Low Temperature Fast Neutron Irradiation

Published online by Cambridge University Press:  28 February 2011

G. Wallner ,
H. Franz ,
R. Rauch ,
A. Schmalzbauer  and
J. Peisl
G. Wallner
Affiliation:
Sektion Physik der Ludwig-Maximilians-Universität, D-8000 München 22, FRG
H. Franz
Affiliation:
Sektion Physik der Ludwig-Maximilians-Universität, D-8000 München 22, FRG
R. Rauch
Affiliation:
Sektion Physik der Ludwig-Maximilians-Universität, D-8000 München 22, FRG
A. Schmalzbauer
Affiliation:
Sektion Physik der Ludwig-Maximilians-Universität, D-8000 München 22, FRG
J. Peisl
Affiliation:
Sektion Physik der Ludwig-Maximilians-Universität, D-8000 München 22, FRG
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Abstract

Defects introduced into single crystals of Al,Cu, and Fe by low temperature fast neutron irradiation were examined by diffuse scattering of X-rays. Structure and correlations of interstitials and vacancies were investigated after irradiation and during annealing. The primary defect structure is characterized by the correlation of defects in defect cascades. Size distributions for the arrangement of interstitials and vacancies were obtained. The evolution of the damage structure during recovery was followed and found to depend on the primary damage state. In Al we find large and dilute cascades with a mean radius of R-90Å, whereas in Cu small and dense cascades with R-20Å are produced. During recovery in Cu dislocation loops of interstitial and vacancy type are formed. In Al agglomeration of interstitials does not lead to loop formation. In Fe rather dilute cascades with R=60Å are observed. Here only small agglomerates of interstitials evolve during recovery in stages I and III.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 138: Symposium Q – Characterization of the Structure and Chemistry of Defects in Materials , 1988 , 35
Copyright
Copyright © Materials Research Society 1989

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References

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