Method of desizing fiber

Patent metadata

Field	Value
Publication number	US-9765455-B2
Application number	US-201514595294-A
Country	US
Kind code	B2
Filing date	Jan 13, 2015
Priority date	Jan 31, 2014
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

Abstract

A method of preparing a fiber for use in forming a ceramic matrix composite material comprises the steps of removing a polymer coating from an outer surface of glass or ceramic fibers by providing heated and humidified gas across the glass or ceramic fibers for a period of time.

First claim

The invention claimed is:

1. A method of preparing a fiber for use in forming a ceramic matrix composite material comprising the steps of:
removing a polymer coating from an outer surface of glass or ceramic fibers by providing heated and humidified gas across said glass or ceramic fibers for a period of time; and
wherein said gas is initially heated, and then passed through a source of water prior to being passed across said glass or ceramic fibers.

2. The method as set forth in claim 1 , wherein said glass or ceramic fibers have a diameter of greater than or equal to 5 micron and less than or equal to 150 micron.

3. The method as set forth in claim 2 , wherein said gas is heated to a temperature between 20 and 900° C.

4. The method as set forth in claim 3 , wherein said gas is heated to between 300 and 500° C.

5. The method as set forth in claim 4 , wherein said gas is air.

6. The method as set forth in claim 4 , wherein said glass or ceramic fibers include bundled fibers provided with polymer coating on the outer surface.

7. The method as set forth in claim 6 , wherein said bundled fibers are provided with a subsequent interface coating after having the polymer coating removed.

8. The method as set forth in claim 7 , wherein said subsequent interface coating is provided by a chemical vapor deposition process.

9. The method as set forth in claim 7 , wherein said subsequent interface coating includes at least one inner layer and an outer layer.

10. The method as set forth in claim 9 , wherein said at least one inner layer of the interface coating is boron nitride.

11. The method as set forth in claim 9 , wherein said outer layer of the interface coating is one of silicon nitride, silicon carbide, boron carbide, carbon, and combinations thereof.

12. The method as set forth in claim 1 , wherein the glass or ceramic fibers are woven into fabric prior to the polymer coating removal step.

13. The method as set forth in claim 1 , wherein said gas is heated to between 300 and 500° C.

14. The method as set forth in claim 13 , wherein said gas is air.

15. The method as set forth in claim 1 , wherein said gas is air.

16. The method as set forth in claim 1 , wherein said glass or ceramic fibers include bundled fibers provided with the polymer coating on the outer surface.

17. The method as set forth in claim 16 , wherein said bundled fibers are provided with a subsequent interface coating after having the polymer coating removed.

18. The method as set forth in claim 17 , wherein said subsequent interface coating is provided by a chemical vapor deposition process.

19. The method as set forth in claim 17 , wherein said subsequent interface coating includes at least one inner layer and an outer layer.

20. The method as set forth in claim 1 , wherein said coated fibers are utilized to form a component for a gas turbine engine.

Assignees

• United Technologies Corp

Inventors

• Magdefrau Neal
• Sheedy Paul
• Kashyap Tania Bhatia

Classifications

• C04B2235/5244

  Silicon carbide · CPC title

• C04B2235/5224

  Alumina or aluminates · CPC title

• C04B35/62863

  Silicon carbide · CPC title

• C23C16/00

  Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes (reactive sputtering or vacuum evaporation C23C14/00) · CPC title

• D02J13/00

  Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass (heating, cooling or drying during spinning or twisting D01H; drying of yarns or the like, in general F26B) · CPC title