Disclosed is a multi-phase abradable coating including a ceramic matrix and a dislocator phase.

The disclosure describes articles and techniques that include an airfoil having a hybrid coating system to provide improved particle impact resistance and improve CMAS attack resistance on the pressure side of the airfoil and improved thermal load protection on the suction side of the airfoil. An example article for a gas turbine engine may include a substrate, and a hybrid environmental barrier coating (EBC) including a relatively dense EBC layer on a first portion of the substrate and a relatively porous EBC layer on a second portion of the substrate, where the first portion of the substrate is different from the second portion of the substrate, and wherein at least a portion of the relatively porous EBC layer overlaps at least a portion of the relatively dense EBC layer in an overlap region.

The disclosure describes articles and techniques that include an airfoil having a hybrid coating system to provide improved particle impact resistance and improve CMAS attack resistance on the pressure side of the airfoil and improved thermal load protection on the suction side of the airfoil. An example article for a gas turbine engine may include a substrate, and a hybrid environmental barrier coating (EBC) including a relatively dense EBC layer on a first portion of the substrate and a relatively porous EBC layer on a second portion of the substrate, where the first portion of the substrate is different from the second portion of the substrate, and wherein at least a portion of the relatively porous EBC layer overlaps at least a portion of the relatively dense EBC layer in an overlap region.

A structure for high temperature applications includes a base structure which includes a ceramic composite material, and a coating of a metal-semimetal compound, a metal boride, a metal carbide and/or a metal nitride. Furthermore, a production method and a coating device produces structures which resist high temperature applications with higher process temperatures and difficult chemical conditions.

A structure for high temperature applications includes a base structure which includes a ceramic composite material, and a coating of a metal-semimetal compound, a metal boride, a metal carbide and/or a metal nitride. Furthermore, a production method and a coating device produces structures which resist high temperature applications with higher process temperatures and difficult chemical conditions.

An article having a coating system configured to inhibit or prevent crystallization of TGO at the operating temperature of the article. An article includes a substrate defining a surface and a coating layer that includes a dopant configured to inhibit crystallization of amorphous silicon dioxide thermally grown oxide on the bond coat at an operating temperature of the article. The dopant includes a glass modifier. By inhibiting or preventing TGO crystallization, the described coating systems may increase a useable life of the component.

A spraying material comprising a rare earth (R), aluminum and oxygen, the spraying material being a powder and comprising a crystalline phase of a rare earth (R) aluminum monoclinic (R.sub.4Al.sub.2O.sub.9) and a crystalline phase of a rare earth oxide (R.sub.2O.sub.3), with respect to diffraction peaks detected within a diffraction angle 2 range from 10 to 70 by a X-ray diffraction method using the characteristic X-ray of Cu-K, the spraying material having diffraction peaks attributed to the rare earth oxide (R.sub.2O.sub.3) and diffraction peaks attributed to the rare earth (R) aluminum monoclinic (R.sub.4Al.sub.2O.sub.9), and an intensity ratio I(R)/I(RAL) of an integral intensity I(R) of the maximum diffraction peak attributed to the rare earth oxide (R.sub.2O.sub.3) to an integral intensity I(RAL) of the maximum diffraction peak attributed to the rare earth aluminum monoclinic (R.sub.4Al.sub.2O.sub.9) being at least 1.

A spraying material comprising a rare earth (R), aluminum and oxygen, the spraying material being a powder and comprising a crystalline phase of a rare earth (R) aluminum monoclinic (R.sub.4Al.sub.2O.sub.9) and a crystalline phase of a rare earth oxide (R.sub.2O.sub.3), with respect to diffraction peaks detected within a diffraction angle 2 range from 10 to 70 by a X-ray diffraction method using the characteristic X-ray of Cu-K, the spraying material having diffraction peaks attributed to the rare earth oxide (R.sub.2O.sub.3) and diffraction peaks attributed to the rare earth (R) aluminum monoclinic (R.sub.4Al.sub.2O.sub.9), and an intensity ratio I(R)/I(RAL) of an integral intensity I(R) of the maximum diffraction peak attributed to the rare earth oxide (R.sub.2O.sub.3) to an integral intensity I(RAL) of the maximum diffraction peak attributed to the rare earth aluminum monoclinic (R.sub.4Al.sub.2O.sub.9) being at least 1.

Organic solvent based slurry compositions for making an environmental barrier coating including from about 6.8 wt % to about 96.1 wt % solvent; from about 3.9 wt % to about 93.2 wt % primary material; and from about 0.01 wt % to about 20 wt % slurry sintering aid.

Organic solvent based slurry compositions for making an environmental barrier coating including from about 6.8 wt % to about 96.1 wt % solvent; from about 3.9 wt % to about 93.2 wt % primary material; and from about 0.01 wt % to about 20 wt % slurry sintering aid.