Reaction coatings on metals by laser processing : a study on interface structures and wetting phenomena

At the start of this thesis work, two goals were formulated: apply a ceramic coating on aluminium alloys by laser processing for practical purpose, and subsequently try to understand the physical nature of bonding at the metal-ceramic interfaces. The first aim was realized by means of a reaction coating technique. In the reaction coating processes, the exothermic heat from the chemical reactions plays a predominate role in obtaining a thick and homogeneous ceramic layer on aluminum alloys. The second aim has been approached along two seperate routes: a study of wetting process of liquid metals on ceramic substrate and a microscopic study of metal-ceramic interfaces.

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