Auswahl der wissenschaftlichen Literatur zum Thema „Résistance à l'adhérence“
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Zeitschriftenartikel zum Thema "Résistance à l'adhérence"
Adrouche, K., und M. Lorraine. „Influence des paramètres constitutifs de l'association acier-béton sur la résistance de l'adhérence aux chargements cycliques lents“. Materials and Structures 20, Nr. 4 (Juli 1987): 315–20. http://dx.doi.org/10.1007/bf02485928.
Der volle Inhalt der QuelleDissertationen zum Thema "Résistance à l'adhérence"
Bégué, Geoffrey. „Etude de l'adhérence de barrière thermique EB-PVD par choc laser (LASAT) pour le développement d'un contrôle non-destructif sur aube de turbine aéronautique“. Thesis, Paris, ENMP, 2015. http://www.theses.fr/2015ENMP0093.
Der volle Inhalt der QuelleThe assessment of the interface strength of EB-PVD thermal barrier coating (TBC) is a key issue to control the production and better understand the ceramic spallation that will occur during life duration of coated turbine blades. The Laser Shock Adhesion Test (LASAT) involving bi-dimensional shock wave propagation, namely the LASAT-2D, consists in measuring the interfacial crack diameter when implementing a set of laser shocks with increased laser power densities. Applying the LASAT onto an industrial blade requires implementing the laser shock onto the ceramic side. A protective vinylic adhesive tape and a confinement by transparent adhesive tape are used to generate the shock on the ceramic. Shock wave propagation is studied through specific experiments and a numerical simulation. The interfacial crack is revealed by the presence of a spot that could be measured on a top-view optical image of the ceramic. Reproductibility of the LASAT applied on the coated side of the TBC is thereby established. Harmfulness of a loaded area with and without cracks is investigated thanks to thermal cycling in order to validate a non-destructive protocol. The presence of cracks at the interface between alumina and zirconia does not reduce the life duration of coated turbine blades in thermal cycling. Initial adhesion strength is compared both qualitatively and quantitatively for different samples and qualitatively for some turbine blades. Evolution of the interface strength with thermal cycling is presented. A correlation between initial adhesion and time of spallation of the ceramic is demonstrated on different samples
Nejmeh, Kassem. „Enhancing adhesion and Water Resistance in Clayey adhesives Mixtures : Strategies for Vertical and Horizontal Applications“. Electronic Thesis or Diss., Université Gustave Eiffel, 2024. http://www.theses.fr/2024UEFL2012.
Der volle Inhalt der QuelleEarthen material has long been favored in building construction for its eco-friendly characteristics. Fine clay particles play a crucial role in enhancing the cohesion of such materials. This research focuses on exploring clay-based mixtures as potential substitutes for traditional tile adhesives used on concrete slabs. The objective is to develop a material that exhibits strong adhesion resistance and maintains its integrity even when submerged in water. Considering the porous nature of the clay mixture, adherence to specific drying conditions and immersion periods becomes crucial.The initial stage of the investigation involves conducting a mechanical test to measure the adhesive stress of the material before and after water immersion. A reference soil sample serves as the baseline for evaluating this stress. To influence the mechanical properties, we introduce a proportional amount of polymers or fibers into the reference soil, aiming to alter its cohesive attributes. The selection of polymers or fibers is strategic, intended to induce changes in the material's mechanical properties and its resistance to water.In the subsequent phase, the study focuses on understanding the drying process and imbibition kinetics following the addition of polymers. Additionally, we provide evidence that the choice of polymer significantly affects the kinetics of immersion and the degree of water absorption.The research approach unfolds in three distinctive scenarios: firstly, we enhance the strength of the mortar by incorporating diverse polymers and fibers; secondly, we aim to impede water absorption into the adhesive; and finally, we endeavor to develop a reversible adhesive capable of reclaiming its mechanical strength after experiencing loss due to immersion, solely through a drying process. Moreover, we devise strategies specific to different application methods, addressing both vertical and horizontal applications
Quach, Thi Hai Yen. „Etude de la durabilité d'un primaire epoxy anticorrosion : rôle de l'interphase polymère/métal et conséquence sur l'adhérence“. Toulon, 2010. https://theses.hal.science/tel-00647580/fr/.
Der volle Inhalt der QuelleThe organic coatings durability is an important industrial and scientific topic. The life time of an anticorrosion coating depends mainly on its adhesion on the metallic substrate. The aim of this work consists in indentifying the interphase area and understanding its influence on adhesion between an anticorrosion coating and a metallic substrate. We try also to validate experimental parameters for following coating deterioration, as well as the development of corrosion or delamination at the metallic interface during immersion. These protocols may be use to predict the coatings durability. A no filled coating with different stoichiometries and a commercial primer are studied. Both are based on the same polymer binder DGEBA-Polyamidoamide. The anticorrosion coating is formulated with a vinyl terpolymer, ferrous oxide and zinc phosphate as anticorrosion pigments and talc as main filler. Different methods are used to characterize the interphase area in the DGEBA / Polyamidoamine systems applied onto steel: the Fourier Transformed Infra Red spectroscopy (FTIR), the Micro Thermal Analysis (µTA) and a method based on deflexion measurements. We have observed differences of behaviour between the properties of the interphase and those of the bulk one. The inherent limits of the characterization by deflexion measurements drive to overestimate the thickness of the interphase. The characterizations by IR and µTA have allowed observing the interphase to a smaller scale. We have then observed by IR a strong presence of amine in an interphase are a which thickness is about 40 µm. This strong concentration of amine is also confirmed by µTA results, that drive to a reduction of Tg from the bulk to the metallic interface. Different samples have suffered a hygrothermal artificial ageing test, which involved modifications of the interphase. Moreover, a study by Electrochemical Impedance Spectroscopy (EIS) is performed in order to characterize evolutions of protection properties. For that, measurements of pore and charge transfer resistances as coating capacitance have been carried out as a function of immersion and hygrothermal ageing times. Their evolutions have shown 3 stages for loss of protection properties, and also the control of phenomena at the metallic interface by barrier properties. Finally, adhesion measurements of the coatings on the metallic substrate complete and confirm previous results. They precise the beneficial effect of the amine on the adhesion and also on the reversibility of that adhesion after drying
Bressy, Christine. „Synthèse de revêtements à base de PVDF et de dérivés phosphonés. Application à l'adhérence sur acier et à l'anticorrosion“. Montpellier 2, 1996. http://www.theses.fr/1996MON20204.
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