Coated Articles and Manufacture Methods

Patent metadata

Field	Value
Publication number	US-2016017726-A1
Application number	US-201414776154-A
Country	US
Kind code	A1
Filing date	Mar 14, 2014
Priority date	Mar 15, 2013
Publication date	Jan 21, 2016
Grant date	—

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 ore and zirconia.

First claim

What is claimed is:

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

2 . The article of claim 1 wherein:
the didymium oxide ore 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 ore 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 resulting ceramic system is between 0.8 and 1.2 (W m−1 K−1).

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

9 . The article of claim 1 wherein:
the thermal barrier coating comprises:
said layer ( 28 ; 28 - 1 , 28 - 2 ); and
at least one YSZ ( 27 ; 27 - 1 ; 27 - 2 ) layer between the bondcoat and said layer.

10 . The article of claim 8 wherein:
the thermal barrier coating further comprises:
a mixed phase field ( 25 ) of fluorite and pyrochlore crystal structure-rare earth zirconate A 2 B 2 O 7 between said layer said at least one YSZ layer.

11 . The article of claim 8 wherein:
the thermal barrier coating comprises a plurality of said layers ( 28 - 1 , 28 - 2 ) alternating with a plurality of said at least one YSZ layer ( 27 - 1 , 272 ).

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

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

14 . The method of claim 12 further comprising:
the applying the didymium oxide ore and the zirconia comprises EB-PVD.

15 . A method for coating an article, the method comprising:
applying a bondcoat; and applying a combination of didymium oxide ore and zirconia forming didymium zirconate.

Assignees

• United Technologies Corp

Inventors

• Bochiechio Mario P

Classifications

• C23C28/3215

  at least one MCrAlX layer · CPC title

• C23C4/134

  Plasma spraying · CPC title

• C23C4/11

  Oxides · CPC title

• C23C28/345

  with at least one oxide layer · CPC title

• F01D5/288 Primary

  Protective coatings for blades · CPC title