COATING FOR GAS TURBINE ENGINE COMPONENTS

• Main Authors: HAZEL, Brian T, LIU, Xuan
• Format: Patent
• Language: English; French; German
• Published: 16.12.2020
• Subjects: BLASTING; 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; ENGINE PLANTS IN GENERAL; HEATING; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; METALLURGY; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; STEAM ENGINES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; WEAPONS

A method of treating a component (90) for a gas turbine engine (20) includes injecting a suspension stream (84) into a plasma gas stream (82), the suspension stream (84) having coating particles moving in the gas stream (82) toward a component (90), and placing the coating particles on the component (90) at a coating location (L2) to form a top coat (90F) that has a columnar microstructure (90G) such that a porosity of the columnar microstructure (90G) is between 4.0-7.0 percent, exclusive of the intersegment gaps (G).