Abstract: A method of applying an environmental barrier coating and an environmental barrier coating. The method includes applying a high apparent density powder via a high temperature and high velocity (HTHV) process. The high apparent density powder comprises at least one of rare earth silicates; mullite or alkaline silicate.

Abstract: An environmental barrier coating topcoat for improved resistance to calcium-magnesium-aluminosilicate (CMAS) degradation is disclosed. The CMAS mitigation compositions are based on spinel-containing materials. A CMAS-resistant multilayer structure on a substrate, the multi-CMAS-resistant topcoat 140 layer structure including a bond coating layer on the substrate; a hermetic EBC layer on the bond coating layer; and a CMAS-resistant topcoat layer including at least one of AB2O4 materials (A=Mg, Ni, Co, Cu, Mn, Ti, Zn, Be, Fe or combinations thereof; and B=Al, Fe, Cr, Co, V or combinations thereof); AB2O4 materials mixture with AxOy (A=Mg, Ni, Co, Cu, Mn, Ti, Zn, Be, Fe); AB2O4 materials mixture with BxOy (B=Al, Fe, Cr Co, V); AB2O4 materials mixture with RE2Si2O7 or RE2SiO5 silicate (RE=rare earth material); AB2O4 with rare earth oxides-stabilized Zirconia; AB2O4 with rare earth oxides-stabilized Hafnia; AB2O4 with aluminosilicates; AB2O4 with rare earth garnets; and MgO, NiO, Co2O3, Al2O3.

Abstract: A Si-based composite bond coat for environmental barrier coatings on a Si-based ceramic matrix composite that protects the CMC from an oxidation environment by in-situ modifying a thermally grown oxide (TGO) using a TGO modifier to suppress cristobalite TGO cracking during thermal cycling in a gas turbine engine.

Abstract: Articles coated with a porous, segmented thermal barrier coating. The coating described has a density less than about 88% of the theoretical density. Multi-layer articles and methods of applying the thermal barrier coatings to an article are also described.

Abstract: A bond coating material providing unexpectedly high thermal cyclic fatigue resistance and sulfidation resistance, and unexpectedly prolonged thermal cycle life in high temperature environments of gas turbine engine components with and without the presence of sulfur contains: a) 10% to 30% by weight chromium, b) at least one of tantalum and molybdenum in a total amount of 3% to 15% by weight, c) 5% to 13% by weight aluminum, d) 0.1% to 1.4% by weight silicon, e) 0.1% to 0.8% by weight yttrium, f) 0% to 1.2% by weight carbon, g) 0% to 1% by weight dysprosium, h) 0% to 1% by weight cerium, i) the balance being nickel, and the percentages of a) to i) adding up to 100% by weight. The total amount of tantalum and molybdenum, and the amounts of aluminum and silicon are each critical for avoiding delamination of a top coat from a bond coat.

Abstract: A multi-layer coating arrangement includes an environmental barrier coating (EBC) over a substrate; and at least one dense vertically cracked (DVC) coating layer over the EBC. The at least one DVC layer is resistant to erosion, water vapor corrosion and to calcium-magnesium-aluminum-silicate (CMAS).

Abstract: An erosion and CMAS resistant coating arranged on a TBC coated substrate and including at least one porous vertically cracked (PVC) coating layer providing lower thermal conductivity and being disposed over a layer of MCrAlY wherein M represents Ni, Co or their combinations. At least one dense vertically cracked (DVC) erosion and CMAS resistant coating layer is deposited over the at least one PVC coating layer.

Abstract: An erosion and CMAS resistant coating arranged on an EBC coated substrate includes at least one porous vertically cracked (PVC) coating layer providing CTE mitigation and being disposed over the EBC coated substrate. At least one dense vertically cracked (DVC) erosion and CMAS resistant coating layer is deposited over the at least one PVC coating layer.

Abstract: A coated component is generally provided, along with methods of forming such a coating system. The coated component includes a substrate having a surface with a coating system thereon. The coating system may include a columnar thermal barrier coating (TBC) over the surface of the substrate, with the columnar TBC including surface-connected voids. An intermediate layer is over the columnar TBC layer. The intermediate layer has a surface opposite of the columnar TBC that is rougher than the surface of the columnar TBC. A second TBC is over the intermediate layer.

Abstract: Articles coated with a porous, segmented thermal barrier coating. The coating described has a density less than about 88% of the theoretical density. Multi-layer articles and methods of applying the thermal barrier coatings to an article are also described.

Abstract: Amorphous mixed metal oxides are used as a feedstock for thermal spray coating. Compared to thermal spray coating methods utilizing crystalline metal oxide feedstocks, the present method reduces energy consumption and expands the range of feedstock chemical compositions. The present method also produces coatings with improved chemical homogeneity. Methods of preparing the amorphous mixed metal oxides are also described.

Abstract: Amorphous mixed metal oxides are used as a feedstock for thermal spray coating. Compared to thermal spray coating methods utilizing crystalline metal oxide feedstocks, the present method reduces energy consumption and expands the range of feedstock chemical compositions. The present method also produces coatings with improved chemical homogeneity. Methods of preparing the amorphous mixed metal oxides are also described.