US 12,313,140 B2
Tooling of multi-pile plates for semi-forced flow
Eric Bouchard, Moissy-Cramayel (FR)
Assigned to SAFRAN LANDING SYSTEMS, Velizy-Villacoublay (FR)
Appl. No. 18/838,783
Filed by SAFRAN LANDING SYSTEMS, Velizy-Villacoublay (FR)
PCT Filed Feb. 16, 2023, PCT No. PCT/FR2023/050206
§ 371(c)(1), (2) Date Aug. 15, 2024,
PCT Pub. No. WO2023/156737, PCT Pub. Date Aug. 24, 2023.
Claims priority of application No. 2201359 (FR), filed on Feb. 16, 2022.
Prior Publication US 2025/0109775 A1, Apr. 3, 2025
Int. Cl. C04B 35/52 (2006.01); C04B 38/00 (2006.01); F16D 69/02 (2006.01)
CPC F16D 69/023 (2013.01) [C04B 35/52 (2013.01); C04B 38/0093 (2013.01); C04B 2235/614 (2013.01); C04B 2235/94 (2013.01); F16D 2250/0092 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for densification by pressure gradient chemical vapor infiltration of porous annular substrates having a central passage, the method comprising:
providing a plurality of stacks of porous annular substrates, each stack comprising an internal volume formed by the central passages of the stacked substrates,
providing a plurality of individual modules, each individual module comprising a support plate and stacks of porous annular substrates disposed on the support plate, the support plate comprising, for each stack, a gas inlet opening emerging into the internal volume,
forming, in a chamber of a densification furnace, a stack of individual modules, each gas inlet opening of the support plate of a first individual module mounted on a second individual module communicating with the internal volume of one of the stacks of the second individual module so as to allow a gas to flow between the individual modules, and
injecting into the internal volume of each stack of porous annular substrates a gas phase comprising a gaseous precursor of a matrix material to be deposited within porosities of the substrates,
wherein, for each second individual module surmounted by a first individual module, each stack comprises at least one cover ring supported on a top of the stack of porous annular substrates via an annular spacer and a sealing ring disposed around the annular spacer in a plane perpendicular to a direction in which the porous annular substrates are stacked, and a deformable annular seal is disposed between the at least one cover ring and the support plate of said first individual module.