US 12,285,884 B2
Method for densifying a fibrous texture by injecting a slip
Nicolas Eberling-Fux, Moissy-Cramayel (FR); Clément Marie Benoît Roussille, Moissy-Cramayel (FR); Mélissa Bazerque, Moissy-Cramayel (FR); and Paul Carminati, Moissy-Cramayel (FR)
Assigned to SAFRAN CERAMICS, Le Haillan (FR)
Appl. No. 18/852,931
Filed by SAFRAN CERAMICS, Le Haillan (FR)
PCT Filed Mar. 28, 2023, PCT No. PCT/FR2023/050442
§ 371(c)(1), (2) Date Sep. 30, 2024,
PCT Pub. No. WO2023/194673, PCT Pub. Date Oct. 12, 2023.
Claims priority of application No. 2203041 (FR), filed on Apr. 4, 2022.
Prior Publication US 2025/0100183 A1, Mar. 27, 2025
Int. Cl. B28B 1/00 (2006.01); B28B 1/26 (2006.01); B28B 23/00 (2006.01); C04B 35/565 (2006.01)
CPC B28B 1/265 (2013.01) [B28B 23/0006 (2013.01); C04B 35/565 (2013.01); C04B 2235/6027 (2013.01); C04B 2235/606 (2013.01); C04B 2235/616 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for densifying a fibrous texture made of ceramic material with a ceramic matrix used in injection equipment comprising:
a mold cavity defined between a mold and a counter-mold, the mold cavity defining an internal space, and
a membrane comprising a stiffened zone, the membrane being intended to be placed between a fibrous texture present in the mold cavity and the counter-mold, and the stiffened zone of the membrane having a Young's modulus greater than 200 GPa, the method comprising:
placing a predensified fibrous texture in the mold cavity, the predensified fibrous texture having corrugations on the surface and placing the stiffened zone of the membrane on the predensified fibrous texture in such a way that the stiffened zone of the membrane is in contact with the peaks of the corrugations of the predensified fibrous texture;
closing the injection equipment by placing the counter-mold on the membrane and applying a compaction pressure to the membrane so as to keep the stiffened zone of the membrane in contact with the peaks of the corrugations of the predensified fibrous texture; and
densifying the predensified fibrous texture by infiltrating a slip into the porosity of the predensified fibrous texture, the slip being injected into the mold chamber laterally to the stiffened zone of the membrane at an injection pressure such that a difference in pressure between the compaction pressure and the injection pressure is between 0.5×105 Pa and 6×105 Pa.