US 12,110,581 B2
Aircraft part made of superalloy comprising rhenium and/or ruthenium and associated manufacturing method
Amar Saboundji, Moissy-Cramayel (FR); and Fabrice Crabos, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 17/766,764
Filed by SAFRAN, Paris (FR)
PCT Filed Oct. 8, 2020, PCT No. PCT/FR2020/051775
§ 371(c)(1), (2) Date Apr. 6, 2022,
PCT Pub. No. WO2021/069842, PCT Pub. Date Apr. 15, 2021.
Claims priority of application No. 1911122 (FR), filed on Oct. 8, 2019.
Prior Publication US 2024/0093343 A1, Mar. 21, 2024
Int. Cl. C23C 14/02 (2006.01); B32B 15/01 (2006.01); C22C 19/05 (2006.01); C23C 14/16 (2006.01)
CPC C23C 14/021 (2013.01) [B32B 15/01 (2013.01); C22C 19/058 (2013.01); C23C 14/16 (2013.01); B32B 2311/22 (2013.01); B32B 2605/18 (2013.01)] 18 Claims
OG exemplary drawing
 
7. A part, comprising:
a substrate made of a monocrystalline superalloy, comprising at least one element chosen from rhenium and ruthenium, the substrate having a γ-γ′ phase, an average mass fraction of rhenium and/or ruthenium greater than or equal to 3%,
a protective coating covering at least a portion of a surface of the substrate,
wherein
the average mass fraction of rhenium and/or ruthenium on the portion of the surface of the substrate is less than 2%, and
the protective coating has a γ-γ′ phase and an average mass fraction of rhenium and/or ruthenium of less than 1%, and wherein the at least a portion of the surface of the substrate has an arithmetic average roughness Ra between 0.5 μm and 5 μm, the arithmetic average roughness Ra being measured over an area greater than 1 mm2 and being obtained by chemical attack in a wet acid medium of the at least a portion of the surface of the substrate.