US 11,746,065 B2
Method for manufacturing a part made of composite material using an adhesion promoter comprising a Lewis acid or a Lewis complex
Nicolas Eberling-Fux, Moissy-Cramayel (FR); Marion France Hélène Schmidt, Moissy-Cramayel (FR); and Samuel Jean-Charles Bernard, Saint-Just-le-Martel (FR)
Assigned to CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); SAFRAN CERAMICS, Le Haillan (FR); UNIVERSITE DE BORDEAUX, Bordeaux (FR); UNIVERSITE DE MONTPELLIER, Montpellier (FR); and ECOLE NATIONALE SUPERIEURE DE CHIMIE DE MONTPELLIER, Montpellier (FR)
Appl. No. 18/7,572
Filed by SAFRAN CERAMICS, Le Haillan (FR); CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris (FR); UNIVERSITE DE BORDEAUX, Bordeaux (FR); UNIVERSITE DE MONTPELLIER, Montpellier (FR); and ECOLE NATIONALE SUPERIEURE DE CHIMIE DE MONTPELLIER, Montpellier (FR)
PCT Filed Jun. 2, 2021, PCT No. PCT/FR2021/050998
§ 371(c)(1), (2) Date Dec. 1, 2022,
PCT Pub. No. WO2021/250341, PCT Pub. Date Dec. 16, 2021.
Claims priority of application No. 2005989 (FR), filed on Jun. 9, 2020.
Prior Publication US 2023/0192567 A1, Jun. 22, 2023
Int. Cl. C04B 41/45 (2006.01)
CPC C04B 41/4554 (2013.01) [C04B 41/4552 (2013.01); C04B 2235/483 (2013.01); C04B 2235/616 (2013.01); C04B 2235/65 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for manufacturing a part made of composite material comprising:
a) introducing an adhesion promoter into pores of a fibrous preform formed by yarns coated by a coating having —OH groups at its surface, the adhesion promoter being a Lewis complex or a Lewis acid, the Lewis complex adhesion promoter comprising a reactive structure Si of formula B1-X—H, where B1 is a Lewis base, the Lewis acid adhesion promoter comprising a reactive structure S2 of formula X—H with the atom X having an empty orbital, in these two alternatives, X designates boron or aluminium,
b) grafting the adhesion promoter to the surface of the coating by addition on the —OH groups at the atom X,
c) introducing a ceramic precursor resin into the pores of the fibrous preform, after the step of grafting the adhesion promoter,
d) polymerising the introduced resin and bonding the grafted adhesion promoter to the resin by chemical reaction between these two compounds at the X—H bond of the grafted promoter, the polymerisation and the bonding being carried out by heating the fibrous preform into which the resin has been introduced,
e) forming a ceramic matrix phase in the pores of the fibrous preform by pyrolysis of the polymerised resin.