Process for the vapor phase aluminization of a turbomachine metal part and donor liner and turbomachine vane comprising such a liner

摘要

An aluminization process by vapor phase deposition for high-temperature oxidation protection of a metal turbomachine part. The part including a cavity into which a metal component is introduced and assembled from an opening in the part. A halide is formed by reaction between a halogen and a metal donor containing aluminum, then the halide is transported by a carrier gas in order to come into contact with the metal part, wherein the metal component has first, before the implementation of the process, been surface-enriched with aluminum in order to serve as an aluminum donor.

主权项

1. A hollow turbomachine vane including a liner for distributing cooling air,
the liner being cylindrical, the liner including a first end which is welded or brazed to a coolant supplying opening of the vane and a second end which is introduced into and not welded to a housing which communicates with an outlet of the vane, and a surface of the liner being coated, at least partially, with a layer of at least 15 weight percent of aluminum, wherein a thickness of the layer of aluminum is determined so as to have a sufficient amount of aluminum to react with a halogen to form a vapor-phase halide during an aluminization operation of an internal surface of the vane, and wherein the internal surface of the vane is free of a coating comprising aluminum.