Rotor-stator assembly for a gas turbine engine
AssigneeSafran Helicopter Engines
InventorsJulien Gurt Santanach, Fabrice Crabos
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Abstract
A rotor-stator assembly for a gas turbine engine, the assembly including a rotor having a layer of ceramic material forming an abrasive coating deposited on its tip, the layer being constituted mainly by zirconia and possessing a void ratio less than or equal to 15%, and a stator arranged around the rotor and provided facing the tip of the rotor with a layer of ceramic material forming an abradable coating, the layer being constituted mainly by zirconia possessing a void ratio lying in the range 20% to 50% with pores having size less than or equal to 50 μm.
Claims13
A rotor-stator assembly for a gas turbine engine, the assembly comprising:
- a rotor including a layer of ceramic material forming an abrasive coating deposited on its tip, said abrasive coating layer being constituted mainly by zirconia and possessing a void ratio less than or equal to 15%;
- and
- a stator arranged around the rotor and provided facing the tip of the rotor with a layer of ceramic material forming an abradable coating, said abradable coating layer being constituted mainly by zirconia possessing a void ratio lying in a range 20% to 50% with pores including size less than or equal to 50 μm to control a porosity of the abradable coating layer so as to provide the abradable coating with an erosion resistance, and wherein
- the porosity of the abradable coating layer presents a distribution that is bimodal with fine pores of a size less than or equal to 5 μm and medium pores of a size lying in a range 15 μm to 50 μm.
Dependencies are inferred from the claim text.