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Microscopie photothermique, application à la caractérisation des propriétés thermoélastiques, microscopiques de composites carbone-carbone et de barrières thermiques

Abstract : Two photothermal microScopy techniques are presented, which are devoted to the local material therit~o elastic properties measurement. Here, we focus on thermal barrier coatings for turbine blades and carbon/carbon composites. In the first part, photoreflectance technique is used for local thermal properties characterization of carbon fibres and matrix so as heterogeneous media (thin coating and functionally graded materials). Theoretical development required for experimental results analysis are presented so as results of numerous experimental data. The second part deals with interferometric photothermal microscopy technique. Once th e experimental set up is described, the photothermal signal origin is analysed to point out several experimental artefacts which can be partially experimental removed. This technique is used for thermal diffusivity measurement of an A1PdMn quasicristal so as the elastic anisotropy and crystallographic orientation of AMI single cristal
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Julien Jumel. Microscopie photothermique, application à la caractérisation des propriétés thermoélastiques, microscopiques de composites carbone-carbone et de barrières thermiques. Matériaux. Cachan, Ecole normale supérieure ., 2003. Français. ⟨tel-02113516⟩

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