摘要:
The invention relates to a method for producing a ceramic material containing metal oxide, including the following consecutive steps consisting in: (a) supplying a flash-sintering device with a nanocrystalline powder comprising crystallites and crystallite agglomerates of a material having formula Zr 1-X M x O 2 , wherein M is selected from yttrium, scandium and cerium, or Ce 1-X M' X O 2 wherein M' is selected from gadolinium, scandium, samarium and yttrium, in which x is between 0 and 0.2, said powder having an average crystallite size of between 5 and 50 nm, an average crystallite-agglomerate size of between 0.5 and 20 μm, and a specific surface area of between 20 and 100 m2/g; and (b) flash-sintering said powder by applying a pressure of between 50 to 150 MPa at a temperature of between 850° C and 1400° C for a period of 5 to 30 minutes.
摘要:
Disclosed are a method for manufacturing an abradable coating having variable densities and an abradable coating of said type having variable densities. According to the invention, the method involves the following steps: providing a substrate (32) that has a first portion, the surface of which is at a first level (A), and a second portion, the surface of which is at a second level (B) that is different from the first level; applying a precursor material to the first and second portions of the substrate (32); compressing the precursor material between the substrate and a support surface; and sintering the compressed precursor material so as to obtain an abradable coating (36) comprising a first area (36a) which faces the first portion of the substrate and has a first density, and a second area (36b) which faces the second portion of the substrate and has a second density that differs from the first density.