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Periodic {001} Walls of Defects in Proton-Irradiated Cu and Ni

Published online by Cambridge University Press:  26 February 2011

P. Ehrhart ,
W. Jäger ,
W. Schilling ,
F. Dworschak ,
Afaf A. Gadalla  and
N. Tsukuda
P. Ehrhart
Affiliation:
Kernforschungsanlage Jülich, IFF, D-5170 Jülich
W. Jäger
Affiliation:
Kernforschungsanlage Jülich, IFF, D-5170 Jülich
W. Schilling
Affiliation:
Kernforschungsanlage Jülich, IFF, D-5170 Jülich
F. Dworschak
Affiliation:
Kernforschungsanlage Jülich, IFF, D-5170 Jülich
Afaf A. Gadalla
Affiliation:
Assiut University, Assiut, Egypt
N. Tsukuda
Affiliation:
Kyushu University, Fukuoka, Japan
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Abstract

The evolution of the defect structure in 3 MeV-proton irradiated Cu and Ni has been investigated by transmission electron microscopy and by differential dilatometry. The proton irradiations were performed at T≦100°C up to irradiation doses of 2 dpa. An efficient loss of selfinterstitial atoms at dislocations and a consequently high average concentration of vacancies in clusters is observed starting from rather low fluences. In addition an ordering of the defects in the form of periodic {001} walls with a typical periodicity length of ≈ 60 nm is observed for all equivalent {001} planes. The walls consist of high local concentrations of dislocations, dislocation loops and stacking-fault tetrahedra. The observed formation of periodic arraysof defect walls is considered as an example for a possibly general microstructural phenomenon in metals under irradiation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 82: Symposium I – Characterization of Defects in Materials , 1986 , 265
Copyright
Copyright © Materials Research Society 1987

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References

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