Segmented gadolinia zirconia coatings

• Main Authors: COTTOM, BRENT ALLEN, NARSAVAGE, STEPHEN
• Format: Patent
• Language: Chinese; English
• Published: 01.07.2006
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

Segmented gadolinia zirconia coatings, and methods of making same, are described herein. These segmented gadolinia zirconia coatings are created by plasma spraying a gadolinia zirconia coating onto a bond-coated substrate under predetermined conditions so that segmentation is induced in the gadolinia zirconia coating during plasma spraying thereof. These segmented gadolinia zirconia coatings may comprise a single layer, or may comprise a coating system comprising a base foundation layer; a graded interlayer disposed on the base foundation layer; and an abradable gadolinia zirconia top layer disposed on the graded interlayer, wherein the graded interlayer comprises a compositional blend of the base foundation layer and the abradable gadolinia zirconia top layer. Coated components comprising a metallic substrate; a MCrAlY bond coat disposed on the metallic substrate, wherein M denotes nickel, cobalt, iron, or mixtures thereof; and a segmented gadolinia zirconia coating disposed on the MCrAlY bond coat are also