Method for injecting a loaded suspension into a fibrous texture and method for manufacturing a part made of composite material

Patent metadata

Field	Value
Publication number	US-2021362368-A1
Application number	US-201816648427-A
Country	US
Kind code	A1
Filing date	Sep 18, 2018
Priority date	Sep 19, 2017
Publication date	Nov 25, 2021
Grant date	—

Abstract

A method for injecting a loaded suspension into a fibrous texture having a three-dimensional or multilayer weaving includes the injection of a suspension containing a powder of solid particles into the volume of the fibrous texture. The injection of the loaded suspension is carried out by at least one hollow needle in communication with a loaded suspension supply device, each needle being movable in at least one direction extending between a first face and a second opposite face of the fibrous texture so as to inject the loaded suspension at one or more determined depths in the fibrous texture.

First claim

1 . A method for injecting a loaded suspension into a fibrous texture having a three-dimensional or multilayer weaving comprising the injection of a suspension containing a powder of solid particles into the volume of the fibrous texture, wherein the injection of the loaded suspension is carried out by means of at least one hollow needle in communication with a loaded suspension supply device, each needle being movable in at least one direction extending between a first face and a second opposite face of the fibrous texture so as to inject the loaded suspension at one or more determined depths in the fibrous texture.

2 . The method according to claim 1 , wherein each hollow needle has an external diameter of between 0.4 mm and 0.8 mm.

3 . The method according to claim 1 , wherein each hollow needle has a beveled end.

4 . The method according to claim 1 , wherein the needle(s) is/are moved sequentially between a first face and a second opposite face of the fibrous texture, the needle(s) being stopped at intermediate positions between these two faces, a determined dose of loaded suspension being injected into the texture at each intermediate position.

5 . The method according to claim 1 , wherein the at least one needle is moved continuously between a first face and a second opposite face of the fibrous texture, the loaded suspension being injected continuously at a determined flow rate into the fibrous texture.

6 . The method according to claim 1 , wherein, during the injection of the loaded suspension, the fibrous texture is placed in a compaction tooling comprising at least on one face one or more through holes for the needle(s).

7 . A method for manufacturing a part made of composite material comprising:
forming a fibrous texture by three-dimensional or multilayer weaving between a plurality of yarns, injecting a loaded suspension into the fibrous texture according to claim 1 , the loaded suspension comprising at least one liquid or solid precursor of a matrix, compacting the injected fibrous texture, transforming said at least one precursor into a matrix.

8 . The method according to claim 7 , wherein the yarns of the fibrous texture are formed of refractory ceramic fibers, the loaded suspension containing refractory ceramic particles as a solid precursor of a ceramic matrix, the method comprising the heat treatment of the refractory ceramic particles present in the fibrous texture in order to form a refractory ceramic matrix in said texture.

9 . The method according to claim 7 , wherein the yarns of the fibrous texture are formed of fibers consisting of one or more of the following materials: the alumina, the mullite, the silica, an aluminosilicate, a borosilicate, silicon carbide and carbon.

10 . The method according to claim 7 , wherein the refractory ceramic particles are made of a material chosen from: the alumina, the mullite, the silica, an aluminosilicate, an aluminophosphate, the zirconia, a carbide, a boride and a nitride.

Assignees

• Safran Ceram

Inventors

• Diss Pascal
• Lavasserie Eric

Classifications

• C04B35/80

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

• C04B35/62886

  by wet chemical techniques · CPC title

• B29C70/085

  the structure being deformed in a three dimensional configuration (B29C53/805 takes precedence) · CPC title

• B29C70/025

  with particular filler · CPC title

• C04B35/117

  Composites · CPC title