Abstract:
A turbine engine component is provided which has a substrate (14), a yttria-stabilized zirconia coating (10) applied over the substrate (14), and a molten silicate resistant outer layer (20). The molten silicate resistant outer layer (20) is formed from gadolinia or gadolinia-stabilized zirconia. A method for forming the coating system of the present invention is described.
Abstract:
An article has a metallic substrate having a first emissivity. A thermal barrier coating atop the substrate may have an emissivity that is a substantial fraction of the first emissivity.
Abstract:
An article has a characteristic thermal-mechanical stress principal direction. The article has a single crystal substrate having a lowest modulus direction within a target alignment with the principal direction.
Abstract:
An apparatus for depositing a coating on a part comprises: a chamber (42); a source (48) of a coating material, positioned to communicate the coating material to the part in the chamber; a plurality of thermal hoods (162); and means for moving a hood of the plurality of thermal hoods from an operative position and replacing the hood with another hood of the plurality of hoods.
Abstract:
A multilayer coating (100) includes a bond coat layer (102) and a first barrier layer (104) applied on the bond coat layer. The first barrier layer (104) has a compositional gradient comprising a majority of a first rare earth stabilized zirconia material proximate the bond coat layer (102) to a majority of a second rare earth stabilized zirconia material away from the bond coat layer. The first and second rare earth stabilized zirconia materials are different.
Abstract:
A process of coating an article includes the steps of (1) applying a ceramic based compound to at least one surface of an article to form a layer of ceramic based compound; (2) applying at least one inert compound upon the ceramic based compound layer to form a protective layer, wherein the at least one inert compound is composed of a first inert compound having a cubic crystalline structure of formula (I) A 3 B 2 X 3 O 12 , or a second inert compound comprising a hexagonal crystalline structure of formula (II) A 4 B 6 X 6 O 26 , or a mixture of the first inert compound and the second inert compound; and (3) heat treating the coated article.
Abstract:
A thermal barrier coating system for use on a turbine engine component which reduces sand related distress is provided. The coating system comprises at least one first layer of a stabilized material selected from the group consisting of zirconia, hafnia, and titania and at least one second layer containing at least one of oxyapatite and garnet. Where the coating system comprises multiple first layers and multiple second layers, the layers are formed or deposited in an alternating manner.
Abstract:
A method for coating a substrate of a turbine engine component comprising cold spray depositing a metal-based material onto a surface of the substrate, and heating the deposited metal-based material to increase the porosity of the deposited metal-based material.