SHROUD ABRADABLE COATINGS AND METHODS OF MANUFACTURING

• Main Author: LEBLANC, LUC STEPHANE
• Format: Patent
• Language: English; French; German
• Published: 06.07.2016
• 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

Methods 200,300 of manufacturing turbine shrouds 10 with an abradable coating 14 that balance the apparently contradictory requirements of high flowpath solidity, low blade tip wear, and good durability in service may include forming an abradable coating on a surface of a coating system to form a substantially smooth flowpath surface. Forming the abradable coating 14 includes forming a relatively porous, smooth abradable coating. The methods may also include machining the abradable coating 14 so as to achieve a substantially smooth flowpath surface. Corresponding turbine shroud (10).