| abstract |
The invention relates to a thermal barrier (20) on a metal substrate (10) for applications at temperatures higher than an elevated temperature T, which comprises a first ceramic coating (30) which is located on said substrate (10) and which is constituted of several chemical elements. The thermal barrier (20) further comprises, directly on the outer face (35) of the first coating (30), a second coating (40) which is porous with a specific surface area greater than 10 m 2 / g and which comprises at least one chemical elements of the first coating (30), the second coating (40) completely covering the outer face (35). |