Tool and method for manufacturing a composite-material part by means of a liquid process

Patent metadata

Field	Value
Publication number	US-2022016801-A1
Application number	US-201917414765-A
Country	US
Kind code	A1
Filing date	Dec 19, 2019
Priority date	Dec 21, 2018
Publication date	Jan 20, 2022
Grant date	—

Abstract

A tool for manufacturing a ceramic matrix composite part by injecting a slurry, the tool includes an injection chamber intended to receive at least one fibrous preform to be densified, wherein the injection chamber includes first injection ports which are formed in a first side of the injection chamber for injecting the slurry into the injection chamber, the first injection ports being distributed along the first side of the injection chamber; the injection chamber includes first drainage ports which are formed on the first side of the injection chamber for draining a liquid phase of the slurry from the injection chamber, the first drainage ports being distributed along the first side of the injection chamber; and the tool includes a first filtration element which is located on the first side of the injection chamber and which is located opposite the first drainage ports.

First claim

1 . A tool for manufacturing a ceramic matrix composite part by injecting a slurry, said tool comprising an injection chamber adapted to receive at least one fibrous preform to be densified, wherein:
the injection chamber comprises a plurality of first injection ports which are formed in a first side of said injection chamber for injecting the slurry into the injection chamber, said first injection ports being distributed along the first side of the injection chamber; the injection chamber comprises a plurality of first drainage ports which are formed on the first side of said injection chamber for draining a liquid phase of the slurry from the injection chamber, said first drainage ports being distributed along the first side of the injection chamber; and the tool comprises a first filtration element which is located on the first side of said injection chamber and which is located opposite the first drainage ports.

2 . The tool as claimed in claim 1 , wherein between 2% and 30% of a surface area of the first side of the injection chamber is pierced by the first injection ports and the first drainage ports.

3 . The tool as claimed in claim 1 , wherein at least one first injection port is located between two first drainage ports.

4 . The tool as claimed in claim 1 , wherein the injection chamber comprises a first end and a second end opposite the first end, a first drainage port being located at the first end of the injection chamber and a first drainage port located at the second end of the injection chamber.

5 . The tool as claimed in claim 1 , wherein a plurality of second injection ports is located on a second side of the injection chamber which is opposite to the first side of said injection chamber, wherein a plurality of second drainage ports is located on said second side of said injection chamber, and wherein a second filtration element is located on said second side of the injection chamber opposite the second drainage ports.

6 . The tool as claimed in claim 1 , wherein said tool comprises a rigid and fixed mold forming a second side of the injection chamber opposite the first side of said injection chamber, and wherein the tool comprises a rigid and movable counter-mold which forms the first side of the injection chamber.

7 . The tool as claimed in claim 1 , wherein said tool comprises a rigid and fixed mold forming a second side of the injection chamber opposite the first side of said injection chamber, and wherein the tool comprises a flexible membrane which forms the first side of the injection chamber.

8 . The tool as claimed in claim 7 , wherein a draining felt is arranged between the first filtration element and the first drainage ports.

9 . A process for manufacturing a ceramic matrix composite part comprising:
placing a first fibrous preform in an injection chamber formed in a tool as claimed in claim 1 ; injecting a slurry comprising ceramic particles suspended in a liquid phase into the first fibrous preform through a first side of said first fibrous preform through a plurality of first injection ports; draining the liquid phase of the slurry through a plurality of first drainage ports from the first side of the first fibrous preform through a first filtration element configured to retain the ceramic particles in the first fibrous preform.

10 . The process as claimed in claim 9 , further comprising:
placing the first fibrous preform and a second fibrous preform in the injection chamber, the first fibrous preform and the second fibrous preform being located on either side of a central core; injecting through a plurality of second injection ports the slurry into the second fibrous preform through a first side of said second fibrous preform; draining the liquid phase of the slurry through a plurality of second drainage ports from the first side of the second fibrous preform through a second filtration element configured to retain the ceramic particles in the second fibrous preform.

11 . The process as claimed in claim 9 , wherein the first fibrous preform is fixed on a porous support, the process comprising a step of sealing the support with the slurry before the step of injecting the slurry into the first fibrous preform by injecting a fugitive material into the porosities of said support, the process further comprising a step of removing the fugitive material after the liquid phase of the slurry has drained.

12 . The process as claimed in claim 9 , wherein the first fibrous preform has a thickness of 10 mm or less.

13 . The process as claimed in claim 10 , wherein at least one among the first fibrous preform and the second fibrous preform has a thickness of 10 mm or less.

Assignees

• Safran Ceram

Inventors

• Philippe Eric
• Bounia Medhy Damien
• Clerambourg Aurélia

Classifications

• B28B1/261

  Moulds therefor (absorbent moulds in general B28B7/344) · CPC title

• C04B35/80

  Fibres, filaments, whiskers, platelets, or the like · CPC title

• C04B2235/80

  Phases present in the sintered or melt-cast ceramic products other than the main phase · CPC title

• C04B35/185

  Mullite {3Al2O3-2SiO2} · CPC title

• C04B35/573

  obtained by reaction sintering {or recrystallisation} · CPC title