Method of manufacturing or repairing a coating on a metallic substrate
AssigneeSnecma Moteurs
InventorsCatherine RICHIN, Alain Siccat
Life of this patent
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Abstract
The invention provides a method of manufacturing or repairing a coating on a metallic substrate. Production of said coating comprises forming a pre-layer on the substrate or on a sub-layer of the coating placed on the substrate by applying one or more layers of a paint containing at least one metal selected from the group constituted by platinum class metals (platinoids) and chromium. Application to the formation or localized repair of a thermal barrier on a superalloy turbo engine part.
Claims11
A method of manufacturing or repairing a coating forming a thermal barrier on a superalloy substrate, wherein said coating comprises a binding sub-layer formed by an MCrAlY alloy, M being a metal selected from the group consisting of nickel, cobalt, iron and a mixture of said metals, said binding sub-layer being modified by forming a pre-layer on a surface of said binding sub-layer by:
- first applying one or more layers of a paint including platinum class metals (platinoids) to the binding sub-layer, and
- second, performing diffusion heat treatment of the one or more layers of paint.
Dependencies are inferred from the claim text.