Effect of irradiation damage on the shear strength of Cu–Nb interfaces

The influence of irradiation-induced damage on the interfacial shear strength of Cu–Nb interfaces was characterized via compression of nanolaminate pillars performed in situ in a transmission electron microscope. Chemical mixing and interfacial roughening during MeV Kr ion irradiation leads to incre...

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Bibliographic Details
Published in:Scripta materialia 2014-11, Vol.90-91 (C), p.29-32
Main Authors: Mao, Shimin, Özerinç, Sezer, King, William P., Averback, Robert S., Dillon, Shen J.
Format: Article
Language:English
Subjects:
Copper
Correlation
In situ transmission electron microscopy
Interfacial shear strength
Ion beam mixing
Irradiation
Liquid nitrogen
Nanostructure
Pillars
Roughening
Shear strength
Spectroscopy
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Summary:The influence of irradiation-induced damage on the interfacial shear strength of Cu–Nb interfaces was characterized via compression of nanolaminate pillars performed in situ in a transmission electron microscope. Chemical mixing and interfacial roughening during MeV Kr ion irradiation leads to increased interfacial shear strength by as much as 60%, from 0.6GPa for the as-deposited material to 0.95GPa for samples irradiated at liquid nitrogen temperature. The increase in interfacial shear strength was most pronounced at low temperatures (∼−196°C), but it is still significant at ∼300°C. This observation was correlated with increased chemical mixing at lower temperatures, as determined from compositional profiles characterized by energy-dispersive spectroscopy.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2014.07.009