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Etude, à l'aide du choc laser, des mécanismes d'adhérence aux interfaces cuivre/aluminium et cuivre/cuivre obtenues par projection thermique

Abstract : Due to their processing, coating /substrate and particle/particle interfaces achieved by thermal spraying are rather intricate. To optimize coating adhesion, relationships between interface microstructure and resistance had to be established. For this purpose, the model system of Cu sprayed onto Al was selected for its high metallurgical reactivity. An original test, namely LASAT (LAser Shock Adhesion Test), was developed to determine the adhesion of coatings (of a few hundreds of microns in thickness typically). This test was shown to be particularly sensitive to interface properties and suitable for their local study. Quantitative and thorough interface analyses combined to adhesion test results led to the identification of the main adhesion mechanisms for plasma spray, HVOF and cold spray. The influence of interface cleanliness and morphology was especially studied. Simulations allowed the study of interfacial bonding by reproducing the phenomena occurring at sprayed interfaces.
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Submitted on : Tuesday, April 15, 2008 - 2:40:15 PM
Last modification on : Friday, March 6, 2020 - 1:15:52 AM
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  • HAL Id : tel-00273506, version 1

Citation

Sophie Barradas. Etude, à l'aide du choc laser, des mécanismes d'adhérence aux interfaces cuivre/aluminium et cuivre/cuivre obtenues par projection thermique. Mécanique [physics.med-ph]. École Nationale Supérieure des Mines de Paris, 2004. Français. ⟨tel-00273506⟩

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