US 12,312,282 B2
Environmental barrier for a substrate comprising free silicon
Thibault Mouret, Bordeaux (FR); Francis Rebillat, Pessac (FR); Laurence Maille, Bordeaux (FR); Simon Arnal, Moissy-Cramayel (FR); and Eric Bouillon, Moissy-Cramayel (FR)
Assigned to SAFRAN CERAMICS, Le Haillan (FR); UNIVERSITE DE BORDEAUX, Bordeaux (FR); and CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR)
Appl. No. 18/576,024
Filed by SAFRAN CERAMICS, Le Haillan (FR); UNIVERSITE DE BORDEAUX, Bordeaux (FR); and CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR)
PCT Filed Jun. 30, 2022, PCT No. PCT/FR2022/051305
§ 371(c)(1), (2) Date Jan. 2, 2024,
PCT Pub. No. WO2023/281186, PCT Pub. Date Jan. 12, 2023.
Claims priority of application No. 2107337 (FR), filed on Jul. 7, 2021.
Prior Publication US 2024/0262759 A1, Aug. 8, 2024
Int. Cl. C04B 41/87 (2006.01); C04B 35/16 (2006.01); C04B 35/565 (2006.01); C04B 35/64 (2006.01); C04B 41/50 (2006.01)
CPC C04B 41/87 (2013.01) [C04B 35/16 (2013.01); C04B 35/565 (2013.01); C04B 35/64 (2013.01); C04B 41/5024 (2013.01); C04B 2235/3217 (2013.01); C04B 2235/3224 (2013.01); C04B 2235/3418 (2013.01); C04B 2235/3826 (2013.01); C04B 2235/428 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A part comprising a substrate of ceramic matrix composite material, the substrate comprising silicon, the part further comprising an environmental barrier formed on at least one surface of the substrate,
wherein the environmental barrier comprises at least one compound selected from Yb2-2γGd2γSiO5 and Yb2-2γGd2γSi2O7, where γ is between 0.05 and 0.15,
and wherein the environmental barrier further comprises alumina Al2O3, a molar alumina content being between 5% and 15% relative to a total environmental barrier composition.