High temperature refractory coatings for ceramic substrates

Patent metadata

Field	Value
Publication number	US-9315674-B2
Application number	US-201213662647-A
Country	US
Kind code	B2
Filing date	Oct 29, 2012
Priority date	Jul 17, 2007
Publication date	Apr 19, 2016
Grant date	Apr 19, 2016

Abstract

A composition for manufacturing a composite of a non-oxide ceramic matrix and a refractory phase within the non-oxide ceramic matrix includes a preceramic polymer for forming a non-oxide ceramic matrix and a refractory material dispersed within the preceramic polymer.

First claim

What is claimed is:

1. A composition for manufacturing a composite of a non-oxide ceramic matrix and a refractory phase within the non-oxide ceramic matrix, comprising:
a preceramic polymer for forming a non-oxide ceramic matrix, the preceramic polymer including at least one of polysilane, polysilazane, polycarbosilane, or polyborosilazane; and
a refractory material dispersed within the preceramic polymer, and the refractory material is a silicide of hafnium.

2. The composition as recited in claim 1 , comprising about 5-95 wt % of the preceramic polymer and about 5-95 wt % of the refractory material, totaling 100 wt %.

3. The composition as recited in claim 2 , comprising about 50-95 wt % of the preceramic polymer and about 5-50 wt % of the refractory material, totaling 100%.

4. The composition as recited in claim 1 , wherein the preceramic polymer is a non-stoichiometric composition such that upon pyrolysis the preceramic polymer forms the non-oxide ceramic matrix and a reactive byproduct.

5. The composition as recited in claim 4 , wherein the reactive byproduct is carbon.

6. The composition as recited in claim 1 , where the refractory material includes an additional material selected from the group consisting of elemental forms of molybdenum, niobium, and combinations thereof.

7. The composition as recited in claim 1 , wherein the refractory material additionally includes an elemental form of molybdenum.

8. The composition as recited in claim 1 , wherein the refractory material includes an additional material selected from the group consisting of silicides of titanium, molybdenum, zirconium, niobium, tantalum, tungsten, and combinations thereof.

9. The composition as recited in claim 1 , wherein the refractory material additionally includes a silicide of molybdenum.

10. The composition as recited in claim 1 , wherein the refractory material includes an additional material selected from the group consisting of oxides of molybdenum, niobium, tantalum, tungsten, and combinations thereof.

11. A composition for manufacturing a composite of a non-oxide ceramic matrix and a refractory phase within the non-oxide ceramic matrix, comprising:
a preceramic polymer for forming a non-oxide ceramic matrix, the preceramic polymer including at least one of polysilane, polysilazane, polycarbosilane, or polyborosilazane; and
a refractory material dispersed within the preceramic polymer, and the refractory material is hafnium-containing borosilicate.

12. The composition as recited in claim 11 , comprising about 5-95 wt % of the preceramic polymer and about 5-95 wt % of the refractory material, totaling 100 wt %.

13. The composition as recited in claim 11 , comprising about 50-95 wt % of the preceramic polymer and about 5-50 wt % of the refractory material, totaling 100%.

14. The composition as recited in claim 11 , wherein the preceramic polymer is a non-stoichiometric composition such that upon pyrolysis the preceramic polymer forms the non-oxide ceramic matrix and a reactive byproduct.

15. The composition as recited in claim 14 , wherein the reactive byproduct is carbon.

16. The composition as recited in claim 11 , wherein the refractory material includes an additional material selected from the group consisting of elemental forms of molybdenum, niobium, and combinations thereof.

17. The composition as recited in claim 11 , wherein the refractory material additionally includes an elemental form of molybdenum.

18. The composition as recited in claim 11 , wherein the refractory material includes an additional material selected from the group consisting of silicides of titanium, molybdenum, zirconium, niobium, tantalum, tungsten, and combinations thereof.

19. The composition as recited in claim 11 , wherein the refractory material additionally includes a silicide of molybdenum.

20. The composition as recited in claim 11 , wherein the refractory material includes an additional material selected from the group consisting of oxides of molybdenum, niobium, tantalum, tungsten, and combinations thereof.

Assignees

• Schmidt Wayde R
• Kashyap Tania Bhatia
• Tang Xia
• Jarmon David C
• Donahue Jr Owen B
• United Technologies Corp

Inventors

• Schmidt Wayde R
• Kashyap Tania Bhatia
• Tang Xia
• Jarmon David C
• Donahue Jr Owen B

Classifications

• C04B41/87

  Ceramics · CPC title

• C04B41/89

  for obtaining at least two superposed coatings having different compositions · CPC title

• C04B35/571

  obtained from {Si-containing} polymer precursors {or organosilicon monomers} · CPC title

• C09D5/00 Primary

  Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced {(electrically insulating plastics, resins or waxes H01B3/30)}; Filling pastes · CPC title

• C04B41/5053

  non-oxide ceramics (carbon or carbonisable materials C04B41/5001) · CPC title