METHODE DE FABRICATION D'UNE BARRIERE THERMIQUE RECOUVRANT UN SUBSTRAT METALLIQUE EN SUPERALLIAGE ET PIECE THERMOMECANIQUE RESULTANT DE CETTE METHODE DE FABRICATION

摘要

A fabrication method of fabricating a thermal barrier covering a superalloy metal substrate, the thermal barrier including at least an underlayer and a ceramic layer, the method including: smoothing a surface state of the underlayer by at least one physicochemical and/or mechanical process prior to depositing the ceramic layer such that a number of defects presenting a peak-to-peak difference lower than or equal to 2μm is at most five over any distance of 50μm, and then depositing the ceramic layer. The method can be applied to turbine blades.