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Size effects on the Mechanical Behavior of Nanometric W/Cu Multilayers

Published online by Cambridge University Press:  01 February 2011

Baptiste Girault ,
Guillaume Geandier ,
Dominique Eyidi ,
Pierre-Olivier Renault ,
Eric Le Bourhis  and
Philippe Goudeau
Baptiste Girault
Affiliation:
[email protected], University of Poitiers, Physics, PhyMat UMR 6630, Boulevard Marie et Pierre Curie, Téléport 2, Poitiers, 86962, France, (+33) 5 49 49 66 55, (+33) 5 49 49 66 92
Guillaume Geandier
Affiliation:
[email protected], University of Poitiers, PhyMat - UMR 6630, Boulevard Marie et Pierre Curie, Téléport 2, Poitiers, 86962, France
Dominique Eyidi
Affiliation:
[email protected], University of Poitiers, PhyMat - UMR 6630, Boulevard Marie et Pierre Curie, Téléport 2, Poitiers, 86962, France
Pierre-Olivier Renault
Affiliation:
[email protected], University of Poitiers, PhyMat - UMR 6630, Boulevard Marie et Pierre Curie, Téléport 2, Poitiers, 86962, France
Eric Le Bourhis
Affiliation:
[email protected], University of Poitiers, PhyMat - UMR 6630, Boulevard Marie et Pierre Curie, Téléport 2, Poitiers, 86962, France
Philippe Goudeau
Affiliation:
[email protected], University of Poitiers, PhyMat - UMR 6630, Boulevard Marie et Pierre Curie, Téléport 2, Poitiers, 86962, France
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Abstract

The mechanical behavior of nanostructured stratified W/Cu composites prepared by ion beam sputtering has been investigated using a method combining X-ray diffraction and tensile testing. Tests were performed on a synchrotron light source to analyze the elastic response of the tungsten phase. Three different microstructures have been analyzed: the specimen composed of the thinner tungsten layers reveals an elastic behavior different from the one expected assuming bulk elastic constants. However, Transmission Electron Microscopy (TEM) and Grazing-Incidence Small-Angle X-ray Scattering (GISAXS) measurements reveal discontinuities in the copper layers. As the strain in the related copper clusters as well grains boundary contributions are not experimentally accessible, atomistic calculation are of utmost importance. Polycrystalline materials have already been constructed through the Voronoï method and thanks to TEM observations. Atomistic simulation and calculation are underway to validation.

Keywords

grain sizeelastic propertiesx-ray diffraction (XRD)
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1086: Symposium U – Mechanics of Nanoscale Materials , 2008 , 1086-U04-04
Copyright
Copyright © Materials Research Society 2008

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