US 11,873,736 B2
Turbine part made of superalloy comprising rhenium and/or ruthenium and associated manufacturing method
Amar Saboundji, Moissy-Cramayel (FR); Alice Agier, Moissy-Cramayel (FR); and Virginie Jaquet, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 17/415,082
Filed by SAFRAN, Paris (FR)
PCT Filed Dec. 20, 2019, PCT No. PCT/FR2019/053254
§ 371(c)(1), (2) Date Jun. 17, 2021,
PCT Pub. No. WO2020/128394, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 1873972 (FR), filed on Dec. 21, 2018.
Prior Publication US 2022/0065111 A1, Mar. 3, 2022
Int. Cl. F01D 5/28 (2006.01); C23C 28/00 (2006.01); C22C 19/05 (2006.01); C23C 10/28 (2006.01)
CPC F01D 5/288 (2013.01) [C22C 19/057 (2013.01); C23C 10/28 (2013.01); C23C 28/3215 (2013.01); C23C 28/3455 (2013.01); F05D 2230/31 (2013.01); F05D 2230/40 (2013.01); F05D 2300/132 (2013.01); F05D 2300/143 (2013.01); F05D 2300/175 (2013.01); F05D 2300/607 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A process for manufacturing a turbine part comprising a single-crystal nickel-base superalloy substrate and a sublayer,
the single-crystal nickel-base superalloy substrate having a γ-γ′ phase, comprising chromium with an average mass fraction of chromium less than or equal to 5%, and comprising at least one element selected from rhenium and ruthenium, with an average mass fraction of rhenium greater than or equal to 4% when there is no ruthenium, with an average mass fraction of ruthenium greater than or equal to 4% when there is no rhenium and with an average mass fraction of the total of rhenium and ruthenium greater than or equal to 4% when there is rhenium and ruthenium
the sublayer covering at least part of a surface of the substrate,
the sublayer having a γ-γ′ phase and an average atomic fraction:
of chromium comprised between 5% and 10%,
of aluminum comprised between 10% and 20%,
of platinum comprised between 15% and 25%,
wherein the process comprises at least the steps of:
depositing an enrichment layer on the substrate, the enrichment layer having at least an average atomic fraction of platinum greater than 90% and an average atomic fraction of chromium comprised between 3% and 10%,
heat treating the assembly formed by the substrate and the enrichment layer so that the enrichment layer diffuses at least partially into the substrate.