Method for manufacturing an abradable layer
AssigneesSafran Aircraft Engines, Centre National De La Recherche Scientifique, Universite Paul Sabatier Toulouse III, Institut National Polytechnique De Toulouse
InventorsMélanie Rousselle, Florence Ansart, Claude Gilbert Jean-Pierre Estournes, Guillaume Fradet, Arnaud Louis Gabriel Fregeac, Serge Georges Vladimir Selezneff
Life of this patent
Estimating the term…
Abstract
A method for manufacturing an abradable layer and a substrate coated with this layer, may include: preparing a powder composition including at least ceramic particles and an inorganic filler having a lamellar crystallographic structure, the volume content of the inorganic filler in the powder composition being in a range of from 1 to 75%; compressing the powder composition; and sintering the powder composition thus compressed in order to obtain the abradable layer.
Claims19
A method for manufacturing an abradable layer, the method comprising:
- thermally pretreating an inorganic filler having a lamellar crystallographic structure, at least 80 vol. % of the inorganic filler being in a dehydrated phase at an end of the thermally pretreating;
- preparing a powder composition comprising ceramic particles and the inorganic filler, a content of the inorganic filler in the powder composition being in a range of from 1 to 75 vol. %, the inorganic filler being a lanthanum oxide and comprising LaPO4;
- compressing the powder composition;
- and
- sintering the powder composition thus compressed, to obtain the abradable layer,
- wherein the thermally pretreating is performed at a temperature of 1100° C. for a duration in a range of from 30 to 120 minutes,
- wherein, during the sintering, the powder composition is subject to a uniaxial pressure in a range of from 25 to 100 MPa,
- wherein, during the sintering, the temperature is in a range of from 900 to 1200° C.,
- wherein a duration of the sintering is in a range of from 1 to 30 minutes, and
- wherein a pressure, temperature, and duration of the sintering are applied so as to obtain a volumetric porosity ratio of the abradable layer in a range of from 0.1 to 50%.
Dependencies are inferred from the claim text.