Thermally stable thin-film reflective coating and coating process

Patent metadata

Field	Value
Publication number	US-12215865-B2
Application number	US-202217714064-A
Country	US
Kind code	B2
Filing date	Apr 5, 2022
Priority date	Apr 5, 2022
Publication date	Feb 4, 2025
Grant date	Feb 4, 2025

Abstract

A gas turbine engine component having a substrate; a thermal barrier coating on the substrate having a porous microstructure; and a reflective layer conforming to the porous microstructure of the thermal barrier coating, wherein the reflective layer comprises a conforming nanolaminate defined by alternating layers of platinum group metal materials selected from the group consisting of platinum group metal-based alloys, platinum group metal intermetallic compounds, mixtures of platinum group metal with metal oxides and combinations thereof. A capping layer can be added over the reflective layer. A supporting layer can be added between the reflective layer and the thermal barrier coating. A process is also disclosed.

First claim

What is claimed:

1. A gas turbine engine component, comprising:
a substrate;
a thermal barrier coating on the substrate having a porous microstructure;
a reflective layer conforming to the porous microstructure of the thermal barrier coating, wherein the reflective layer comprises a reflective platinum group metal selected from the group consisting of platinum group metal intermetallic compounds; and
a capping layer on the reflective layer and the thermal barrier coating.

2. The component of claim 1 , wherein the platinum group metal intermetallic compounds are selected from the group consisting of Pt 3 Zr, Pt 3 Hf, Pt 6 Ti, Pt 3 Al and combinations thereof.

3. The component of claim 1 , wherein the reflective layer is a nanolaminate.

4. The component of claim 3 , wherein the nanolaminate is selected from the group consisting of Pt/Ni/Pt, Pt/ZrO 2 /Pt, Pt—Ni/Pt—ZrO 2 , or Pt—Ni/Pt 3 Zr/Pt—Ni.

5. The component of claim 1 , wherein the reflective layer has a thickness of between 50 and 500 nm.

6. The component of claim 1 , wherein the reflective layer has a thickness of between 50 and 200 nm.

7. The component of claim 1 , wherein the capping layer comprises a high temperature metal oxide.

8. The component of claim 7 , wherein the high temperature metal oxide is selected from the group consisting of Al 2 O 3 , HfO 2 , ZrO 2 , TiO 2 , Y 2 O 3 , La 2 O 3 , and combinations thereof.

9. The component of claim 8 , wherein the high temperature metal oxide is selected from the group consisting of HfO 2 and Zro 2 stabilized to tetragonal or cubic phase.

10. The component of claim 7 , wherein the high temperature metal oxide is a transition metal oxide selected from the group consisting of Nio, CoO, FeO, MnO and mixtures thereof.

11. The component of claim 1 , wherein the capping layer has a thickness of up to 200 nm.

12. The component of claim 1 , wherein the capping layer has a thickness of between 1 and 50 nm.

13. The component of claim 1 , further comprising a supporting layer between the thermal barrier coating and the reflective layer.

14. The component of claim 13 , wherein the supporting layer comprises high temperature metal oxides selected from the group consisting of Al 2 O 3 , HfO 2 , ZrO 2 , TiO 2 , Y 2 O 3 , La 2 O 3 , and combinations thereof.

15. The component of claim 13 , wherein the supporting layer comprises at least one of a single oxide and a nanolaminate structure of different oxides.

16. The component of claim 15 , wherein the nanolaminate structure of different oxides is selected from the group consisting of Al 2 O 3 /ZrO 2 /Al 2 O 3 , Al 2 O 3 /HfO 2 /Al 2 O 3 , ZrO 2 /Y 2 O 3 /ZrO 2 , HfO 2 /Y 2 O 3 /HfO 2 , HfO 2 /PrO 2 /HfO 2 , and HfO 2 /ZrO 2 /HfO 2 .

17. The component of claim 13 , wherein the supporting layer has a thickness of up to 200 nm.

18. The component of claim 13 , wherein the supporting layer has a thickness of between 1 and 50 nm.

Assignees

• Raytheon Tech Corp
• Rtx Corp

Inventors

• Zhu Tianli
• Jackson Iii Richard Wesley
• Sharon John A
• Beals James T
• Hazel Brian T

Classifications

• F23R2900/00018

  Manufacturing combustion chamber liners or subparts · CPC title

• F05D2300/611

  Coating · CPC title

• F05D2300/608

  Microstructure · CPC title

• F05D2300/504

  Reflective properties · CPC title

• F05D2300/21

  Oxide ceramics · CPC title