Modelling the Processes of Ceramic Coatings by Surface Laser Treatment

摘要

The paper presents a computation model describing the interaction between a laser beam and the surface of a three layer plate consisting of a nickel base superalloy with a plasma sprayed NiCr AlY alloy layer and a ceramic coating ZrO{sub}2 - Y{sub}2O{sub}3. The mathematical model of heat exchange processes was produced for a plate of finite thickness with the possibility of laser remelting of the ceramic coatings (within a certain depth), and taking into account the changes in physical properties with temperature in the various layers of the plate.