Thermal barrier coating systems and methods of making and using the same

Patent metadata

Field	Value
Publication number	US-9556505-B2
Application number	US-201213600273-A
Country	US
Kind code	B2
Filing date	Aug 31, 2012
Priority date	Aug 31, 2012
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

A coating comprising a first surface and a second surface is provided. The coating includes a plurality of growth domains. An orientation of at least one growth domain of the plurality of growth domains is non-vertical with respect to the first surface of the coating. One or more growth domains of the plurality of growth domains comprise a plurality of at least partially melted and solidified particles.

First claim

The invention claimed is:

1. A coating comprising a first surface and a second surface, comprising:
a plurality of growth domains separated by domain boundaries, wherein the plurality of growth domains comprises a comparatively high density of a coating material and the domain boundaries comprise a comparatively low density of the coating material, wherein the plurality of growth domains comprises a substantially equiaxed grain morphology, wherein growth domains of the plurality of growth domains are substantially parallel to one another, wherein an orientation of one or more growth domains of the plurality of growth domains is non-vertical with respect to the first surface of the coating, wherein the one or more non-vertical growth domains form an alignment angle in a range from about 30 degrees to about 75 degrees with respect to the first surface of the coating, wherein at least about 50 percent by volume of the coating comprises the plurality of growth domains, wherein angles of the plurality of growth domains are within 5 degrees of each other, wherein the coating is substantially crack-free with regard to vertical cracks, and wherein the vertical cracks extend from an outermost surface of the coating through entire thickness or partial thickness of the coating.

2. The coating of claim 1 , wherein the orientation of the one or more growth domains is less than about 75 degrees with respect to the first surface of the coating.

3. The coating of claim 1 , wherein the plurality of growth domains comprises a width in a range from about 20 microns to about 100 microns.

4. The coating of claim 1 , wherein the plurality of growth domains comprise an intra-domain density of at least about 90 percent.

5. The coating of claim 1 , wherein the plurality of growth domains of the coating comprises a ceramic material.

6. The coating of claim 1 , wherein the plurality of growth domains of the coating comprises an oxide.

7. The coating of claim 1 , wherein the plurality of growth domains of the coating is deposited using spraying.

8. The coating of claim 1 , wherein the plurality of growth domains of the coating comprises stabilized zirconia, zirconates, stabilized oxides, or combinations thereof.

9. The coating of claim 1 , wherein the plurality of growth domains of the coating comprises yttria stabilized zirconia.

10. The coating of claim 1 , wherein the coating is a thermal barrier coating.

11. A thermal barrier coating system, comprising:
a substrate comprising a first surface and a second surface;
a bondcoat disposed on at least a portion of the first surface of the substrate; and
a coating disposed on at least a portion of the bondcoat, wherein the coating comprises a plurality of growth domains, wherein growth domains of the plurality of growth domains are substantially parallel to one another, wherein the growth domains are separated by domain boundaries, wherein an orientation of one or more growth domains of the plurality of growth domains is non-vertical with respect to an interface between the bondcoat and the coating, wherein the one or more non-vertical growth domains form an alignment angle in a range from about 30 degrees to about 75 degrees with respect to the interface between the bondcoat and the coating, wherein at least about 50 percent by volume of the coating comprises the plurality of growth domains, wherein the plurality of growth domains comprises regions of comparatively high density of a coating material and domain boundaries are regions of comparatively low density of the coating material, wherein the coating is substantially crack-free with regard to vertical cracks, wherein the vertical cracks extend from an outermost surface of the coating through entire thickness or partial thickness of the coating, and wherein interfacial delamination is absent or minimal at the interface between the bondcoat and the coating.

12. The thermal barrier coating system of claim 11 , wherein the bondcoat comprises a diffusion bondcoat or an overlay bondcoat.

13. The thermal barrier coating system of claim 11 , wherein the bondcoat has a surface roughness of less than about 150 microinches.

14. The thermal barrier coating system of claim 11 , wherein an adhesion strength of the coating to the bondcoat is greater than about 7 megapascals.

15. The thermal barrier coating system of claim 11 , wherein an adhesion strength of the coating to the bondcoat is greater than about 28 megapascals.

16. The thermal barrier coating system of claim 11 , wherein the substrate comprises a component of a gas turbine assembly.

Assignees

• Rosenzweig Larry Steven
• Ruud James Anthony
• Sivaramakrishnan Shankar
• Gen Electric

Inventors

• Rosenzweig Larry Steven
• Ruud James Anthony
• Sivaramakrishnan Shankar

Classifications

• C23C4/12

  characterised by the method of spraying · CPC title

• Y10T428/24355

  Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.] · CPC title

• Y10T428/31

  Surface property or characteristic of web, sheet or block · CPC title

• C23C4/02

  Pretreatment of the material to be coated, e.g. for coating on selected surface areas · CPC title

• C23C4/00 Primary

  Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge (build-up welding B23K, e.g. B23K5/18, B23K9/04) · CPC title