Coated articles and manufacture methods

Patent metadata

Field	Value
Publication number	US-9677167-B2
Application number	US-201414776128-A
Country	US
Kind code	B2
Filing date	Mar 14, 2014
Priority date	Mar 15, 2013
Publication date	Jun 13, 2017
Grant date	Jun 13, 2017

Abstract

An article ( 50; 100 ) has a metallic substrate ( 22 ), a bondcoat ( 30 ) atop the substrate, and a thermal barrier coating ( 28; 27, 28 ) atop the bondcoat. The thermal barrier coating or a layer thereof comprises didymium oxide and zirconia.

First claim

What is claimed is:

1. An article comprising:
a metallic substrate;
a bondcoat atop the substrate; and
a thermal barrier coating atop the bondcoat,

wherein:
the thermal barrier coating or a layer thereof comprises:
didymium oxide; and
zirconia; and

the article is a vane or a blade.

2. The article of claim 1 wherein:
the didymium oxide in said thermal barrier coating or layer thereof is at a concentration of at least one of 15-60 mole present and 32-80 weight percent; and
the zirconia in said thermal barrier coating or layer thereof is at a concentration of at least one of 85-40 mole percent and 20-68 weight percent.

3. The article of claim 1 wherein:
the didymium oxide in said thermal barrier coating or layer thereof is at a concentration of at least one of 25-35 mole percent and 47-59 weight percent; and
the zirconia in said thermal barrier coating or layer thereof is at a concentration of at least one of 65-75 mole and 41-53 weight percent.

4. The article of claim 1 wherein:
the thermal barrier coating or layer thereof has a characteristic thickness of at least 25 micrometers; and
the bondcoat has a characteristic thickness of at least 20 micrometers.

5. The article of claim 1 wherein:
the substrate comprises a nickel-based superalloy.

6. The article of claim 1 wherein:
the article is a gas turbine engine component.

7. The article of claim 1 wherein:
the thermal conductivity of the thermal barrier coating is between 0.8 and 1.2 (W m-1 K-1).

8. The article of claim 1 wherein:
the thermal barrier coating possesses resistance to molten silicate, CMAS, and salts.

9. The article of claim 1 wherein:
the thermal barrier coating comprises:
said layer of the thermal barrier coating; and
at least one YSZ layer between the bondcoat and said layer.

10. The article of claim 9 wherein:
the thermal barrier coating comprises a plurality of said layers alternating with a plurality of said at least one YSZ layer.

11. A method for manufacturing the article of claim 1 , the method comprising:
applying the bondcoat; and
applying the didymium oxide and the zirconia forming didymium zirconate.

12. The method of claim 11 wherein:
the applying the didymium oxide and the zirconia comprises mixing and forming an ingot and vaporizing the ingot.

13. The method of claim 11 further comprising:
the applying the didymium oxide and the zirconia comprises EB-PVD.

14. The method of claim 11 wherein the combination consists essentially of praseodymium oxide, neodymium oxide and zirconia.

15. The article of claim 1 being said vane.

16. The article of claim 1 being said blade.

17. An article comprising:
a metallic substrate;
a bondcoat atop the substrate; and
a thermal barrier coating atop the bondcoat,
wherein the thermal barrier coating or a layer thereof comprises:
didymium oxide; and
zirconia

wherein:
the thermal barrier coating comprises:
said layer of the thermal barrier coating; and
at least one YSZ layer between the bondcoat and said layer; and

the thermal barrier coating further comprises:
a mixed phase field of fluorite and pyrochlore crystal structure-rare earth zirconate A 2 B 2 O 7 between said layer and said at least one YSZ layer.

18. A method for coating an article, the method comprising:
applying a bondcoat; and
applying a combination of didymium oxide and zirconia forming didymium zirconate and wherein the article is a vane or a blade.

19. The method of claim 18 wherein the article is said blade.

20. A method for coating an article, the method comprising:
applying a bondcoat; and
applying a combination of praseodymium oxide, neodymium oxide and zirconia forming zirconate and wherein the article is a vane or a blade.

Assignees

• United Technologies Corp

Inventors

• Bochiechio Mario P

Classifications

• F05D2300/611

  Coating · CPC title

• F05D2300/5023

  Thermal capacity · CPC title

• F05D2260/231

  Preventing heat transfer · CPC title

• F05D2240/55

  Seals · CPC title

• F05D2240/35

  Combustors or associated equipment · CPC title