US 12,441,659 B2
Fused sand-resistant turbine part
Aurélien Joulia, Moissy-Cramayel (FR); Luc Patrice Bianchi, Moissy-Cramayel (FR); and Benjamin Dominique Roger Joseph Bernard, Joue-les-Tours (FR)
Assigned to SAFRAN, Paris (FR)
Appl. No. 17/416,916
Filed by SAFRAN, Paris (FR)
PCT Filed Dec. 20, 2019, PCT No. PCT/FR2019/053269
§ 371(c)(1), (2) Date Jun. 21, 2021,
PCT Pub. No. WO2020/128402, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 1873666 (FR), filed on Dec. 20, 2018.
Prior Publication US 2022/0064072 A1, Mar. 3, 2022
Int. Cl. C04B 35/22 (2006.01); C04B 35/622 (2006.01); C04B 35/657 (2006.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); F01D 5/18 (2006.01)
CPC C04B 35/22 (2013.01) [C04B 35/62222 (2013.01); C04B 35/657 (2013.01); C23C 4/11 (2016.01); C23C 4/134 (2016.01); F01D 5/18 (2013.01); C04B 2235/3234 (2013.01); C04B 2235/3454 (2013.01); C04B 2235/767 (2013.01); C04B 2235/9669 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A turbine part, comprising a substrate, an environmental barrier and at least one reactive layer,
the environmental barrier comprising a thermal insulation layer, a sublayer suitable for promoting adhesion between the substrate and the thermal insulation layer, and a protective layer suitable for protecting the substrate from oxidation and/or corrosion,
the environmental barrier at least partially covering the substrate,
the at least one reactive layer being suitable for reacting with at least one CMAS compound selected from a calcium oxide, a magnesium oxide, an aluminum oxide and a silicon oxide,
the at least one reactive layer covering at least a portion of the environmental barrier,
wherein a material of the at least one reactive layer comprises an oxide of formula A′A″BO5+δ, A′ being selected from a rare-earth element and yttrium, A″ being selected from a rare-earth element, yttrium and aluminum, B being selected from zirconium, hafnium, tantalum and niobium, δ being a real number comprised between 0 and 0.5,
wherein the oxide of formula A′A″BO5+δ has a rare-earth element atomic fraction comprised between 18% and 25%.