Annular part for stator of e.g. high-pressure turbine of turboshaft engine of aircraft, has porous abradable material coating covered with additional layer of non-porous refractory material, where additional layer includes lower thickness

摘要

The part has a porous abradable material coating (14) covered with a additional fine machined layer (16) e.g. nickel-aluminum metal alloy layer, ceramic layer and super alloy layer of metal-chromium-aluminum-yttrium type, of a non-porous refractory material. The fine machined layer has thickness lower than 0.3 mm. A structural support (10) is provided on an internal side of an attachment sub-layer (12). Peaks of blades (18) partially penetrate in the abradable material coating without subjecting to wear.