US 11,897,816 B2
Method for manufacturing a CMC part
Michaël Podgorski, Moissy-Cramayel (FR); Bruno Jacques Gérard Dambrine, Moissy-Cramayel (FR); Emilie Chantal Gisèle Mendez, Moissy-Cramayel (FR); Wen Zhang, Moissy-Cramayel (FR); Yvan Rappart, Moissy-Cramayel (FR); and Charles Leleu, Moissy-Cramayel (FR)
Assigned to SAFRAN, Paris (FR); SAFRAN CERAMICS, Le Haillan (FR); and SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/054,676
Filed by SAFRAN, Paris (FR); SAFRAN CERAMICS, Le Haillan (FR); and SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed May 15, 2019, PCT No. PCT/FR2019/051102
§ 371(c)(1), (2) Date Nov. 11, 2020,
PCT Pub. No. WO2019/220057, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 1854047 (FR), filed on May 15, 2018; and application No. 1854053 (FR), filed on May 15, 2018.
Prior Publication US 2021/0078913 A1, Mar. 18, 2021
Int. Cl. C04B 35/78 (2006.01); C04B 41/00 (2006.01); C04B 41/45 (2006.01); C04B 41/47 (2006.01); C04B 41/50 (2006.01); C04B 41/52 (2006.01); C04B 35/80 (2006.01); C04B 35/565 (2006.01); C04B 35/185 (2006.01); C04B 35/583 (2006.01); C04B 35/584 (2006.01); F01D 5/28 (2006.01); C04B 35/573 (2006.01)
CPC C04B 35/565 (2013.01) [C04B 35/185 (2013.01); C04B 35/573 (2013.01); C04B 35/583 (2013.01); C04B 35/584 (2013.01); C04B 35/78 (2013.01); C04B 35/80 (2013.01); C04B 41/009 (2013.01); C04B 41/459 (2013.01); C04B 41/47 (2013.01); C04B 41/5096 (2013.01); C04B 41/52 (2013.01); F01D 5/288 (2013.01); C04B 2235/422 (2013.01); C04B 2235/5244 (2013.01); C04B 2235/5248 (2013.01); C04B 2235/5252 (2013.01); C04B 2235/6028 (2013.01); F05D 2260/95 (2013.01); F05D 2300/6033 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A process for manufacturing a part made of a ceramic matrix composite material, comprising:
coating an outer surface of a porous preform with a layer of a fugitive material to form a model of the part to be obtained, the fugitive material being a wax or a resin, the fugitive material layer in the model not exceeding a highest peak of surface undulations of the porous preform, and ceramic and/or carbon particles being present in the porosity of the porous preform,
coating the model formed with a ceramic powder composition,
heat treating the coated model to remove the fugitive material and form a ceramic shell mold by sintering of the ceramic powder composition,
introducing a molten composition comprising silicon into the shell mold to obtain the part in the shell mold, the molten composition infiltrating the porosity of the porous preform to form the ceramic matrix, and
separating the shell mold from the part obtained.