Injection coaxiale de poudres sous faisceau laser pour la réalisation de revêtements : problèmes physiques associés

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Abstract
Laser leading is an attractive technique for surface treatment ; by injecting an appropriated powder into the laser beam, various coatings can be achieved : metallic, ceramic or metal matrix composites (MMC), on many substrates. In the present work, a physical analysis of the different phenomena occurring during the powder-laser interaction is reported, especially the energy absorption and the resulting temperature evolution. An experimental agreement is observed with experimental results obtained in MMC coatings, manufactured by using a coaxial nozzle

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