PIECE COMPORTANT UN REVETEMENT SUR UN SUBSTRAT METALLIQUE EN SUPERALLIAGE, LE REVETEMENT COMPRENANT UNE SOUS-COUCHE METALLIQUE

摘要

The invention relates to a part comprising a coating on a superalloy metal substrate, the coating comprising a metal underlayer covering said substrate, the part being characterized in that said metal underlayer contains a base of nickel aluminide and also contains 0.5 at % to 0.95 at % of one or more stabilizer elements M from the group formed by Cu and Ag for stabilizing the gamma and gamma prime phases.