Rapid ceramic matrix composite production method

Patent metadata

Field	Value
Publication number	US-9758436-B2
Application number	US-201615336176-A
Country	US
Kind code	B2
Filing date	Oct 27, 2016
Priority date	Mar 14, 2013
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

Ceramic matrix composite materials and a process for making said composite materials are disclosed.

First claim

What is claimed is:

1. A method of rapidly densifying a ceramic matrix composite, the method comprising:
enclosing a fiber preform within a tool comprising a tool inlet and a tool outlet;
loading the tool into a furnace;
connecting to the tool inlet to a feed line for delivery of a gas or liquid into the tool;
flowing a first gas through the feed line and into the tool, the first gas being evenly distributed through the fiber preform and first gas reactants being deposited on fibers of the fiber preform as a fiber interface coating, thereby forming a coated fiber preform;
flowing a second gas through the feed line and into the tool, the second gas being evenly distributed through the coated fiber preform and second gas reactants being deposited on fibers of the coated fiber preform as a CVI matrix coating, thereby forming a CVI coated fiber preform;
flowing a molten material through the feed line and into the tool for melt infiltration of the CVI coated fiber preform; and
cooling the furnace, the tool dropping below a solidification temperature of the molten material, thereby rapidly densifying a ceramic matrix composite.

2. The method of claim 1 , wherein the fiber interface coating and the CVI matrix coating are formed without removing the tool from the furnace.

3. The method of claim 1 , wherein the CVI matrix coating is formed and the melt infiltration is carried out without removing the tool from the furnace.

4. The method of claim 1 wherein the fiber interface coating and the CVI matrix coating are formed and the melt infiltration is carried out without removing the tool from the furnace.

5. The method of claim 1 , further comprising infiltrating the CVI coated fiber preform with a slurry.

6. The method of claim 5 , wherein infiltration with the slurry takes place without removing the tool from the furnace.

7. The method of claim 5 , wherein infiltration with the slurry takes place during the melt infiltration, the molten material including particles.

8. The method of claim 1 , wherein the tool is heated to a temperature above a melting point of the molten material during the melt infiltration.

9. The method of claim 1 , further comprising, after the cooling, removing the tool from the ceramic matrix composite.

10. The method of claim 1 , wherein the flowing of the first gas is carried out with a pressure gradient of from about 0.001 atm to about 1.5 atm.

11. The method of claim 1 , wherein the fiber interface coating comprises carbon, boron nitride, or silicon doped boron nitride.

12. The method of claim 1 , wherein the flowing of the second gas is carried out with a pressure gradient of from about 0.001 atm to about 1.5 atm.

13. The method of claim 1 , wherein the CVI matrix coating comprises silicon carbide, silicon nitride carbide, boron carbide, or carbon.

14. The method of claim 1 , wherein the tool is a multi-piece tool.

15. The method of claim 1 , wherein the tool is a single piece tool.

16. The method of claim 1 , wherein a valve attached to the feed line separates a gas source from a liquid source.

17. The method of claim 1 , wherein the tool outlet contains a material that allows gas flow but blocks particulate and/or reacts with molten material to create a seal.

18. A method of rapidly densifying a ceramic matrix composite, the method comprising:
enclosing a fiber preform within a tool comprising a tool inlet and a tool outlet;
loading the tool into a furnace;
connecting to the tool inlet to a feed line for delivery of a gas or liquid into the tool;
flowing a first gas through the feed line and into the tool, the first gas being evenly distributed through the fiber preform and first gas reactants being deposited on fibers of the fiber preform as a fiber interface coating, thereby forming a coated fiber preform;
flowing a second gas through the feed line and into the tool, the second gas being evenly distributed through the coated fiber preform and second gas reactants being deposited on fibers of the coated fiber preform as a CVI matrix coating, thereby forming a CVI coated fiber preform;
flowing a molten material through the feed line and into the tool for melt infiltration of the CVI coated fiber preform, the molten material including particles such that infiltration with a slurry takes place during the melt infiltration; and
cooling the furnace, the tool dropping below a solidification temperature of the molten material, thereby rapidly densifying a ceramic matrix composite.

19. A method of rapidly densifying a ceramic matrix composite, the method comprising:
enclosing a fiber preform within a tool comprising a tool inlet and a tool outlet, the tool outlet containing a material that allows gas flow but blocks particulate and/or reacts with molten material to create a seal;
loading the tool into a furnace;
connecting to the tool inlet to a feed line for delivery of a gas or liquid into the tool;
flowing a first gas through the feed line and into the tool, the first gas being evenly distributed through the fiber preform and first gas reactants being deposited on fibers of the fiber preform as a fiber interface coating, thereby forming a coated fiber preform;
flowing a second gas through the feed line and into the tool, the second gas being evenly distributed through the coated fiber preform and second gas reactants being deposited on fibers of the coated fiber preform as a CVI matrix coating, thereby forming a CVI coated fiber preform;
flowing a molten material through the feed line and into the tool for melt infiltration of the CVI coated fiber preform; and
cooling the furnace, the tool dropping below a solidification temperature of the molten material, thereby rapidly densifying a ceramic matrix composite.

Assignees

• Rolls Royce Corp

Inventors

• Lazur Andrew J
• Chamberlain Adam L

Classifications

• C04B35/62894

  with more than one coating layer · CPC title

• C04B35/6286

  Carbides · CPC title

• C04B35/62863

  Silicon carbide · CPC title

• C04B2235/5244

  Silicon carbide · CPC title

• C04B35/62873

  Carbon · CPC title