Oxydation des alliages d'aluminium aéronautiques par plasma électrolytique : caractérisation optique du procédé et étude des cinétiques de croissance des couches

Abstract : Plasma electrolytic oxidation (PEO) or micro-arc oxidation (MAO) is a process through which aluminium oxide layer may be grown onto aluminium substrate. Optical characterization of discharges is carried out using fast video imaging and optical emission spectroscopy, allowing us to distinguish between two different kinds of treatment, depending on the current waveform zand especially on the ratio of positive to negative charge quantity applied to the systeme. The characteristics (morphology, thickness, corrosion resistance) and growth kinetics of the coatings are studied. Growth mechanisms for the different sublayers are proposed for each type of treatment. Electric measurements are carried out allowing us to propose an electric modelling of the system. From these studies, criteria are established that enable coatings with the required properties (in terms of thickness and corrosion resistance) to be grown
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Flore Jaspard. Oxydation des alliages d'aluminium aéronautiques par plasma électrolytique : caractérisation optique du procédé et étude des cinétiques de croissance des couches. Autre. Institut National Polytechnique de Lorraine, 2005. Français. ⟨NNT : 2005INPL112N⟩. ⟨tel-01752926⟩

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