VAPOR-PHASE ALUMINIZATION PROCESS FOR METAL PARTS AND DONOR LINER OF TURBOMACHINE, AND TURBOMACHINE VANE INCLUDING SUCH LINER

摘要

PPROBLEM TO BE SOLVED: To provide a method for forming a coating on a wall in an inner cavity, which has sufficient thickness over the entire wall surface. PSOLUTION: This aluminization process is directed at coating metal turbomachine parts with aluminum for protecting the parts from being oxidized at high temperature by a vapor phase deposition technique. The parts (1) include a cavity into which a metal component (9) is introduced from an opening (5) in the parts and assembled. According to this process, a halide is formed by a reaction between a halogen and a metal donor containing aluminum, and then the halide is transported by a carrier gas to come into contact with the metal parts. The metal component (9) is surface-enriched with aluminum in order to serve as an aluminum donor, before the implementation of the process. The process is applied, in particular, to a nozzle guide vane incorporating a liner. PCOPYRIGHT: (C)2009,JPO&INPIT