| abstract |
The invention concerns a rotor-stator assembly for a gas-turbine engine, comprising a rotor (2) at the apex of which a layer (8) made from a ceramic material forming an abrasive coating is deposited, said layer consisting mainly of zirconia and having a level of porosity equal to or lower than 15%, and a stator (4) disposed around the rotor and provided, opposite the rotor apex, with a layer (6) made from a ceramic material forming an abradable coating, said layer consisting mainly of zirconia and having a level of porosity of between 20% and 50%, with pores smaller than or equal to 50 μm. |