DICKER MIT LASER SEGMENTIERTER KERAMISCHER HITZESCHILD FÜR DEN ANSTREIFRING VON TURBINEN

摘要

A turbine shroud having a coating comprising a bond layer covering the shroud substrate, and a thick ceramic stabilized zirconia layer with a segmented morphology covering the bond coat. The segmented morphology is defined by an array of slots or grooves which extend from the outer surface of the ceramic layer inwards through almost the entire thickness of the coating but without piercing the underlying substrate. The segmented morphology comprises a plurality of grooves that are laser drilled into the ceramic layer. Each groove is formed by laser drilling a series of holes that are spaced from each other so that the groove has a fully segmented portion and a partially segmented portion.