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Relation entre la structure et les propriétés mécaniques de films minces hybrides organiques-inorganiques préparés par voie sol-gel

Abstract : The sol-gel process allows the easy deposition of hybrid organic-inorganic thin films. Mechanical properties of these hybrids do not depend only on the initial composition but also on the strength of the interactions at the interface between both organic and inorganic
components.

The present work validates nanoindentation measurements to evaluate reproducibly Young modulus and universal hardness on SiO2-PMMA based hybrid thin films by using specific indentation procedures in order to limit the time dependence of the response.

We also studied the influence of the morphology of these nanocomposites on the mechanical properties measured by nanoindentation. At first, we modified the strength of the interactions between organic and inorganic components (weak or strong interactions) ; then, we modified the size of the hybrid interface by changing the inorganic component (sol-gel silica or nanoparticles).
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https://tel.archives-ouvertes.fr/tel-00259329
Contributor : Fayna Mammeri <>
Submitted on : Wednesday, February 27, 2008 - 3:47:42 PM
Last modification on : Tuesday, September 22, 2020 - 3:58:38 AM
Long-term archiving on: : Thursday, May 20, 2010 - 11:40:31 PM

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  • HAL Id : tel-00259329, version 1

Citation

Fayna Mammeri. Relation entre la structure et les propriétés mécaniques de films minces hybrides organiques-inorganiques préparés par voie sol-gel. Matériaux. Université Pierre et Marie Curie - Paris VI, 2003. Français. ⟨tel-00259329⟩

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