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Buckling of Thin Films on Substrates: From Straight-Sided Wrinkles to Both Worm-Like and Varicose Structures

Published online by Cambridge University Press:  11 February 2011

M. George ,
F. Cleymand ,
C. Coupeau ,
J. Colin  and
J.W. Grilhé
M. George
Affiliation:
Dpt of Materials Sciences, LMP-SP2MI, University of Poitiers, FRANCE
F. Cleymand
Affiliation:
Dpt of Materials Sciences, LMP-SP2MI, University of Poitiers, FRANCE
C. Coupeau
Affiliation:
Dpt of Materials Sciences, LMP-SP2MI, University of Poitiers, FRANCE
J. Colin
Affiliation:
Dpt of Materials Sciences, LMP-SP2MI, University of Poitiers, FRANCE
J.W. Grilhé
Affiliation:
Dpt of Materials Sciences, LMP-SP2MI, University of Poitiers, FRANCE
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Abstract

The evolution from straight-sided wrinkles to both worm-like and varicose structures has been investigated mainly by atomic force microscopy. The elastic energy variation related to the formation of these two buckling structures has been computed and discussed. It is shown that both transitions are energetically favourable above a longitudinal (along the initial wrinkle axis) critical stress of few GPa in compression, that is of the order of the internal compressive stresses present in the thin films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 749: Symposium W – Morphological and Compositional Evolution of Thin Films , 2002 , W7.7
Copyright
Copyright © Materials Research Society 2003

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References

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