Claims
- 1. An article protected by a thermal barrier coating system comprising:a substrate having a first surface for supporting a thermal barrier coating; a thermal barrier coating including a thermal barrier layer being associated with a thickness T; and, means for segmenting said thermal barrier coating, said segmenting means including a plurality of three-dimensional features being positioned along an imaginary grid defined by a predetermined relationship to said first surface of said substrate, said imaginary grid defining cells of dimension D1×D2 wherein D1 has a value in the range of 0.05 inches to 0.30 inches, inclusive and D2 has a value in the range of 0.05 inches to 0.30 inches, inclusive.
- 2. The article of claim 1 wherein D1 is not equal to D2.
- 3. The article of claim 1 wherein D1 is substantially equal to D2.
- 4. The article of claim 1 wherein said imaginary grid is coincident with said first surface of said substrate and said features are raised ribs formed on said first surface, and wherein said ribs have an associated rib height, R.
- 5. The article of claim 4 wherein said ribs are continuous.
- 6. The article of claim 4 wherein said ribs are discontinuous.
- 7. The article of claim 4 wherein R has a value approximately 25% to 100% of T.
- 8. The article of claim 1 wherein said imaginary grid is coincident with said first surface of said substrate means and said features are grooves formed in said first surface, and wherein said grooves have an associated groove depth, G.
- 9. The article of claim 8 wherein G has a value approximately 25% to 100% of T.
- 10. The article of claim 1 wherein said thermal barrier coating further includes a bond coat layer intermediate said substrate means and said thermal barrier layer and wherein said imaginary grid is coincident with a first surface of said bond coat layer and said features are raised ribs formed on said first surface of said bond coat layer, and wherein said ribs have an associated rib height R.
- 11. The article of claim 10 wherein R has a value approximately 25% to 100% of T.
- 12. The article of claim 1 wherein said thermal barrier coating further includes a bond coat layer intermediate said substrate and said thermal barrier layer and wherein said imaginary grid is coincident with a first surface of said bond coat layer and said features are grooves formed in said first surface of said bond coat layer, and wherein said grooves have a groove depth G.
- 13. The article of claim 12 wherein G has a value approximately 25% to 100% of T.
- 14. The article of claim 1 wherein T has a value from approximately 0.002 inches (0.005 cm) to 0.03 inches (0.075 cm), inclusive.
- 15. The article of claim 1 wherein said features are associated with a width W, and wherein D1 has a value at least 10W.
- 16. The article of claim 1 further comprising:a three-dimensional feature being positioned within a cell of said imaginary grid.
- 17. A method for preparing a coated article having a segmented thermal barrier coating comprising the steps of:furnishing a substrate having a first surface; imposing an imaginary grid defining cells of dimension D1×D2 in a predetermined relationship to said first surface, wherein D1 has a value in the range of 0.05 inches to 0.30 inches, inclusive, and D2 has a value in the range of 0.05 inches to 0.30 inches, inclusive; providing a plurality of three-dimensional features positioned along said imaginary grid; and, applying said thermal barrier coating including a thermal barrier layer to said substrate.
- 18. The method of claim 17 wherein said step of providing a plurality of three-dimensional features includes providing raised ribs on said first surface of said substrate, wherein said ribs have a associated rib height R.
- 19. The method of claim 17 wherein said step of providing a plurality of three-dimensional features includes providing grooves in said first surface of said substrate, wherein said grooves have a associated groove depth G.
- 20. The method of claim 17 wherein said step of applying said thermal barrier coating includes applying a bond coat layer intermediate said substrate and said thermal barrier layer.
- 21. The method of claim 20 wherein said step of providing a plurality of three-dimensional features includes providing raised ribs on a first surface of said bond coat layer, wherein said ribs have an associated rib height R.
- 22. The method of claim 20 wherein said step of providing a plurality of three-dimensional features includes providing grooves in a first surface of said bond coat layer, wherein said grooves have an associated groove depth G.
- 23. The method of claim 17 wherein said step of applying said thermal barrier coating to said substrate includes applying said thermal barrier layer directly to said substrate.
ORIGIN OF THE INVENTION
The invention described herein was made by an employee of the United States Government and maybe manufactured and used by or for the Government for Government purposes without the payment of any royalties thereon or therefor.
US Referenced Citations (15)