Method for fabricating a ceramic material

Patent metadata

Field	Value
Publication number	US-9701591-B2
Application number	US-201313859093-A
Country	US
Kind code	B2
Filing date	Apr 9, 2013
Priority date	Oct 12, 2011
Publication date	Jul 11, 2017
Grant date	Jul 11, 2017

Abstract

A method for fabricating a ceramic material includes providing a mobilized filler material capable of infiltrating a porous ceramic matrix composite. The mobilized filler material includes at least one of a ceramic material and a free metal. The mobilized filler material is infiltrated into pores of the porous ceramic matrix composite. The mobilized filler material is then immobilized within the pores of the porous ceramic matrix composite.

First claim

What is claimed is:

1. A method for fabricating a ceramic material, the method comprising:
using multiple iterations of polymer infiltration and pyrolysis (PIP) to produce a ceramic matrix composite, the multiple iterations including:
at least one iteration of infiltrating a preceramic polymer into an interior of a porous reinforcement structure, curing the infiltrated preceramic polymer and then pyrolyzing the infiltrated preceramic polymer to form the porous ceramic matrix composite with a porous surface zone, and
a final iteration of infiltrating the porous surface zone of the porous ceramic matrix composite with a mobilized glaze material such that pores in the surface zone of the porous ceramic matrix composite, exclusive of the interior of the porous ceramic matrix composite, include the mobilized glaze material and there is a layer of the mobilized glaze material on an exterior side of the porous ceramic matrix composite, wherein the mobilized glaze includes an elemental metal selected from the group consisting of ruthenium, rhodium, hafnium, tantalum, rhenium, osmium, iridium and combinations thereof, and wherein the preceramic polymer of the at least one iteration prior to the final iteration excludes the elemental metal; and

immobilizing the mobilized glaze material, the immobilized glaze material sealing the surface zone and providing an exterior glaze layer on the ceramic matrix composite.

2. The method as recited in claim 1 , including, prior to the final iteration, applying the glaze material, mobilized or prior to mobilizing, onto one or more of the exterior sides of the porous ceramic matrix composite.

3. The method as recited in claim 1 , including, prior to the final iteration, applying the mobilized glaze material onto one or more of the exterior sides of the porous ceramic matrix composite, followed by infiltrating the mobilized glaze material into the porous surface zone.

4. The method as recited in claim 1 , including, prior to the final iteration, applying the glaze material, prior to mobilizing, onto one or more of the exterior sides of the porous ceramic matrix composite, followed by mobilizing the glaze material and then infiltrating the mobilized glaze material into the porous surface zone.

5. The method as recited in claim 1 , wherein the mobilized glaze material is in a preceramic polymer carrier material.

6. The method as recited in claim 1 , wherein the mobilized glaze material is a heated melt.

7. The method as recited in claim 1 , wherein the mobilized glaze includes elemental silicon.

8. The method as recited in claim 1 , wherein the mobilized glaze material includes a ceramic material.

9. The method as recited in claim 8 , wherein the ceramic material is at least partially amorphous.

10. The method as recited in claim 8 , wherein the ceramic material includes a vitreous material.

11. The method as recited in claim 8 , wherein the ceramic material is a silicate-based glass or glass-ceramic, including an element selected from the group consisting of, barium, calcium, magnesium, lithium, sodium, potassium, aluminum, phosphorus, strontium, zinc, the rare earth metals (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, including Sc, Y, and Hf), and combinations thereof.

12. The method as recited in claim 11 , wherein the ceramic material is a silicate-based glass or glass-ceramic, including an element selected from the group consisting of phosphorus, strontium, zinc, the rare earth metals (La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, including Sc, Y, and Hf), and combinations thereof.

13. The method as recited in claim 1 , wherein the immobilized glaze material is a discontinuous layer along the exterior side of the porous ceramic matrix composite.

14. The method as recited in claim 1 , wherein the preceramic polymer that is infiltrated into the interior of the porous reinforcement structure includes an preceramic polymer elemental metal, which is different than elemental metal of the glaze material, and that is selected from the group consisting of ruthenium, rhodium, tantalum, rhenium, osmium, iridium and combinations thereof.

Assignees

• United Technologies Corp

Inventors

• Sheedy Paul
• Schmidt Wayde R
• Kashyap Tania Bhatia

Classifications

• C04B2235/616

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

• C04B2235/408

  Noble metals · CPC title

• C04B2235/522

  Oxidic · CPC title

• C04B2235/483

  Si-containing organic compounds, e.g. silicone resins, (poly)silanes, (poly)siloxanes or (poly)silazanes · CPC title

• C04B2235/5268

  Orientation of the fibers · CPC title