A method of fabricating a part out of ceramic matrix composite material

Patent metadata

Field	Value
Publication number	US-2020181029-A1
Application number	US-201716312545-A
Country	US
Kind code	A1
Filing date	Jun 28, 2017
Priority date	Jun 29, 2016
Publication date	Jun 11, 2020
Grant date	—

Abstract

A method of fabricating a composite material part including fiber reinforcement and a ceramic matrix present in the pores of the fiber reinforcement, the method including a) forming the fiber reinforcement by three-dimensionally weaving ceramic yarns, the fiber reinforcement as formed in this way presenting an interlock weave; b) forming a first ceramic matrix phase in the pores of the fiber reinforcement; c) after performing step b), introducing into the pores of the fiber reinforcement a powder that includes a mixture of SiC particles and of carbon particles; and d) infiltrating the fiber reinforcement obtained after performing step c), with an infiltration composition in the molten state including at least silicon so as to form a second ceramic matrix phase in the pores of the fiber reinforcement, thereby obtaining the composite material part.

First claim

1 . A method of fabricating a composite material part comprising fiber reinforcement and a ceramic matrix present in pores of the fiber reinforcement, the method comprising:
a) forming the fiber reinforcement by three-dimensionally weaving ceramic yarns, the fiber reinforcement as formed in this way presenting an interlock weave; b) forming a first ceramic matrix phase in the pores of the fiber reinforcement; c) after performing step b), introducing into the pores of the fiber reinforcement a powder that comprises a mixture of SiC particles and of carbon particles; and d) after performing step c), infiltrating the fiber reinforcement with an infiltration composition in the molten state comprising at least silicon so as to form a second ceramic matrix phase in the pores of the fiber reinforcement, thereby obtaining the composite material part.

2 . A method according to claim 1 , wherein the first ceramic matrix phase comprises silicon carbide.

3 . A method according to claim 1 , wherein a mean size of the particles introduced during step c) is less than or equal to 5 μm.

4 . A method according to claim 1 , wherein, after performing step b), a residual porosity by volume in the fiber reinforcement lies in the range 30% to 35%.

5 . A method according to claim 1 , wherein an interphase is formed on the ceramic yarns prior to step b).

6 . A method according to claim 1 , wherein the fiber reinforcement comprises silicon carbide yarns presenting an oxygen content less than or equal to 1 atomic percent.

7 . A method according to claim 1 , wherein the fabricated part is a turbine engine part.

8 . A method according to claim 3 , wherein the mean size of the particles introduced during step c) is less than or equal to 1 μm.

Assignees

• Safran Ceram

Inventors

• Clerambourg Aurélia
• Lefebvre Marie
• Denneulin Sébastien
• Philippe Eric
• Bouillon Eric

Classifications

• D03D25/005 Primary

  Three-dimensional woven fabrics · CPC title

• C04B35/80

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

• C04B2235/614

  Gas infiltration of green bodies or pre-forms · CPC title

• C04B35/573 Primary

  obtained by reaction sintering {or recrystallisation} · CPC title

• C04B2235/3826

  Silicon carbides · CPC title