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Comportement à la corrosion galvanique de matériaux composites à matrice d'alliage d'aluminium renforcée par des fibres de carbone haut-module

Abstract : The service behaviour analysis of aluminium matrix composite material reinforced with carbon fibre involves evaluating the corrosion evaluation in a saline environment. The galvanic coupling between the carbon fibres and the aluminium alloy matrix plays a main part in the degradation of these composite materials. A local analysis by an in-situ experimental approach and a semi-analytical modelling are proposed to study the corrosion initiation and propagation at the fibre/matrix interfaces. The galvanic coupling and the aluminium carbide dissolution are involved and in competition in the localized degradation process. Thus the corrosion initiates perpendicularly to the fibre axis and then propagates along the fibre/matrix interface. These local mechanisms are compared to the global degradation of the material in which the fibre structure of the composite material has to be taken into account. A boundary element method simulation is used so that solutions can be proposed to reduce the galvanic corrosion kinetics between fibres and matrix and then improve the service behaviour of the composite materials.
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https://tel.archives-ouvertes.fr/tel-00003521
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Submitted on : Thursday, October 9, 2003 - 7:03:25 PM
Last modification on : Thursday, January 11, 2018 - 6:15:07 AM
Long-term archiving on: : Friday, April 2, 2010 - 7:36:58 PM

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  • HAL Id : tel-00003521, version 1

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Sandrine Payan. Comportement à la corrosion galvanique de matériaux composites à matrice d'alliage d'aluminium renforcée par des fibres de carbone haut-module. Autre. Université Sciences et Technologies - Bordeaux I, 2001. Français. ⟨tel-00003521⟩

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