Reactive phase spray formulation coatings
A reactive phase spray formulation coating is configured to be disposed on the thermal barrier coating of an article. The reactive phase spray formulation coating comprises a base material and a binder material. The base material has a compliance that is higher than a compliance of the binder material, the binder material has a cohesive strength that is greater than a cohesive strength of the base material, the binder material has an adhesive strength that is greater than an adhesive strength of the base material, and the binder material has a surface area of at least ten square-meters per gram that is greater than a surface area of the base material. The binder material is configured to improve a cohesive strength level, an adhesive strength level, and a compliance of the formulation coating of the thermal barrier coating relative to the formulation coating not including the binder material.
1. A method comprising:
combining a base material with a binder material to create a reactive phase spray formulation coating containing between 5% and 45% of the binder material and a balance of the base material, the reactive phase spray formulation coating configured to be deposited on a thermal barrier coating of an article to define an external surface thereon and the reactive phase spray formulation coating having an in-plane modulus of elasticity that is less than 60 GPa, wherein the binder material has a particle size that is less than one micron, and wherein the base material has a particle size between one micron and ten microns, wherein the base material consists of zirconium oxide and yttrium oxide, wherein the binder material consists of zirconium oxide and yttrium oxide,
wherein the base material has a modulus of elasticity that is less than a modulus of elasticity of the binder material,
wherein the binder material has a cohesive strength that is greater than a cohesive strength of the base material,
wherein the binder material has an adhesive strength that is greater than an adhesive strength of the base material,
wherein the binder material has a surface area of at least ten square meters per gram that is greater than a surface area of the base material; and
depositing the reactive phase spray formulation coating on the thermal barrier coating of the article.
2. The method of claim 1 , wherein the reactive phase spray formulation coating is configured to react with dust deposits on the thermal barrier coating.
3. The method of claim 1 , wherein the reactive phase spray formulation coating is configured to reduce an amount of spalling of the thermal barrier coating relative to the reactive phase spray formulation coating not being disposed on the thermal barrier coating.
4. The method of claim 1 , further comprising depositing the reactive phase spray formulation coating on the thermal barrier coating in a non-thermal process.
5. The method of claim 1 , wherein the binder material has a particle size that is greater than 5 nanometers and less than one micron, and wherein the base material has a particle size that is greater than one micron to ten microns.
6. The method of claim 1 , wherein the reactive phase spray formulation coating has a ratio comprising of at least seven parts of the base material to at least three parts of the binder material.
7. The method of claim 1 , wherein the reactive phase spray formulation coating has a weight ratio comprising of at least nineteen parts of the base material to at least one part of the binder material.
8. The method of claim 1 , wherein the reactive phase spray formulation coating deposited on the thermal barrier coating has a thickness of at least ten microns.
9. The method of claim 1 , wherein the dust deposits form a layer of calcia-magnesia-alumina-silica (CMAS) deposits.
10. The method of claim 9 , wherein the reactive phase spray formulation coating reacts with the CMAS deposits to change a chemical composition of the CMAS deposits.
11. A coating system comprising:
a thermal barrier coating disposed on a surface of an article, the thermal barrier coating configured to reduce an amount of degradation of the article relative to the article not having the thermal barrier coating disposed on the surface; and
a reactive phase spray formulation coating on the thermal barrier coating of the article to define an external surface of the coating system, the reactive phase spray formulation coating comprising between 5 wt % and 45 wt % of a binder material and a balance of a base material, wherein the reactive phase spray formulation coating has an in-plane modulus of elasticity that is less than 60 GPa, wherein the binder material has a particle size that is less than one micron, the binder material consisting of a zirconium oxide, a gadolinium oxide, of an yttrium oxide, or a combination thereof, and wherein the base material has a particle size between one micron and ten microns, the base material consisting of a zirconium oxide, a gadolinium oxide, an yttrium oxide, or a combination thereof,
wherein the base material has a modulus of elasticity that is less than a modulus of elasticity of the binder material,
wherein the binder material has a cohesive strength that is greater than a cohesive strength of the base material,
wherein the binder material has an adhesive strength that is greater than an adhesive strength of the base material,
wherein the binder material has a surface area of at least ten square-meters per gram that is greater than a surface area of the base material.
12. The coating system of claim 11 , wherein the reactive phase spray formulation coating is configured to react with dust deposits on the thermal barrier coating.
13. The coating system of claim 12 , wherein the dust deposits form a layer of calcia-magnesia-alumina-silica (CMAS) deposits.
14. The coating system of claim 13 , wherein the reactive phase spray formulation coating reacts with the CMAS deposits to change a chemical composition of the CMAS deposits.
15. The coating system of claim 14 , wherein the reactive phase spray formulation coating reacts with the CMAS deposits to form a melting point phase that is greater than a melting point phase of an alternative base material comprising an alpha aluminum oxide formulation, silicon dioxide, CMAS, strontium aluminum garnet (SAG), gallium alumina perovskite (GAP, gadolinia zirconia (GdZr), or a combination thereof.
16. The coating system of claim 11 , wherein the binder material has a particle size that is greater than 5 nanometers and less than one micron, and wherein the base material has a particle size that is greater than one micron to ten microns.
17. The coating system of claim 11 , wherein the reactive phase spray formulation coating has a weight ratio comprising at least seven parts of the base material to at least three parts of the binder material.
18. The coating system of claim 11 , wherein the reactive phase spray formulation coating deposited on the thermal barrier coating has a thickness of at least ten microns.
19. The coating system of claim 11 , wherein the base material consists of yttrium oxide and zirconium oxide, and the binder material consists of zirconium oxide and yttrium oxide.
20. The coating system of claim 11 , wherein the base material consists of 55% by weight yttrium oxide and zirconium oxide, and the binder material consists of zirconium oxide and 8% by weight yttrium oxide, zirconium oxide and 20% by weight yttrium oxide, or a combination of a zirconia-yttria formulation.