In-situ formation of multiphase deposited thermal barrier coatings
AssigneeSiemens Westinghouse Power Corporation
InventorRamesh Subramanian
Life of this patent
Estimating the term…
Abstract
A multiphase ceramic thermal barrier coating is provided. The coating is adapted for use in high temperature applications in excess of about 1200° C., for coating superalloy components of a combustion turbine engine. The coating comprises a ceramic single or two oxide base layer disposed on the substrate surface; and a ceramic oxide reaction product material disposed on the base layer, the reaction product comprising the reaction product of the base layer with a ceramic single or two oxide overlay layer.
Claims14
A device adapted for use in a high temperature environment in excess of about 1200° C., comprising:
- a substrate having a surface;
- a ceramic single oxide base layer disposed on the substrate surface;
- and
- a ceramic oxide reaction product material disposed on the base layer, the reaction product comprising the reaction product of the base layer with a ceramic single oxide overlay layer,
- wherein the single oxide base layer comprises a composition having the formula CzOw and the single oxide overlay layer comprises a composition having the formula AxOy, wherein C and A are selected from the group consisting of:
- Al, Ca, Mg, Zr, Y, Sc, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Ta, Nb, z and x are selected from the group of integers consisting of:
- 1, 2, 3, and 4, and w and y are selected from the group of integers consisting of:
- 1, 2, 3, 4 and 5.
A device adapted for use in a high temperature environment in excess of about 1200° C., comprising:
- a substrate having a surface;
- a ceramic two-oxide base layer disposed on the substrate surface;
- and
- a ceramic oxide reaction product material disposed on the base layer, the reaction product comprising the reaction product of the base layer with a ceramic two-oxide overlay layer,
- wherein the two-oxide base layer comprises a composition having the formula (C,D)WOZ and the two-oxide overlay layer comprises a composition having the formula (A,B)xOy, wherein C, D, A and B are selected from the group consisting of:
- Al, Ca, Mg, Zr, Y, Sc, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Ta, Nb, w and x are decimals ranging from about 0.5 to about 1.5, and z and y are decimals ranging from about 0.5 to about 2.0.
Dependencies are inferred from the claim text.