A process for producing a ceramic body (100), in particular a dental ceramic blank, having selectively adjustable degrees of expression of one or more different physical properties, wherein the ceramic body (100) has a porosity to enable the control of a selective distribution of one or more chemical substances (101, 102) that are suitable for influencing the physical properties of the ceramic body (100), and in a first step, which is a loading step, the ceramic body is loaded with one or more solutions (104) of the one or more chemical substances (101, 102). In a second step, which is a distribution step, the distribution of the one or more chemical substances (101, 102) within the porous ceramic body (100) is controlled, wherein a progression and/or a spatial progression of the degree of expression of the one or more physical properties can be produced. The control is effected by adjusting one or more ambient parameters (106) in an environment (108), in particular by adjusting the air humidity and/or the pressure and/or the temperature.

A process for producing a ceramic body (100), in particular a dental ceramic blank, having selectively adjustable degrees of expression of one or more different physical properties, wherein the ceramic body (100) has a porosity to enable the control of a selective distribution of one or more chemical substances (101, 102) that are suitable for influencing the physical properties of the ceramic body (100), and in a first step, which is a loading step, the ceramic body is loaded with one or more solutions (104) of the one or more chemical substances (101, 102). In a second step, which is a distribution step, the distribution of the one or more chemical substances (101, 102) within the porous ceramic body (100) is controlled, wherein a progression and/or a spatial progression of the degree of expression of the one or more physical properties can be produced. The control is effected by adjusting one or more ambient parameters (106) in an environment (108), in particular by adjusting the air humidity and/or the pressure and/or the temperature.

A method for the production of a polychromatic and/or spatially polychromatic or a monochrome colored ceramic body, in particular a dentine ceramic blank, which is dyed in this way, wherein in order to control a targeted distribution of color pigments (101, 102) within a porous ceramic (100), in a first step, which is a loading step (3c), the ceramic (100) is loaded with a color pigment solution (104). In a second step, which is a distribution control step (4d), the distribution of the color pigments (101, 102) within the ceramic (100) is controlled by controlling one or more environmental parameters (106) in an environment (108) and/or the pressure and/or temperature.

A method for the production of a polychromatic and/or spatially polychromatic or a monochrome colored ceramic body, in particular a dentine ceramic blank, which is dyed in this way, wherein in order to control a targeted distribution of color pigments (101, 102) within a porous ceramic (100), in a first step, which is a loading step (3c), the ceramic (100) is loaded with a color pigment solution (104). In a second step, which is a distribution control step (4d), the distribution of the color pigments (101, 102) within the ceramic (100) is controlled by controlling one or more environmental parameters (106) in an environment (108) and/or the pressure and/or temperature.

A coated article (20;60) includes a substrate (22) and a coating (24;62) on the substrate. The coating includes at least a first layer (30). The first layer has: a matrix (50); and a filler (52) at 2.0% to 40% by volume in the first layer. The first layer is selected from alkaline earth or transition metal (M) tungstates (MWO4); alkaline earth molybdates (MMoO.sub.4); rare earth (RE) phosphates (REPO.sub.4); and combinations thereof.

A coated article (20;60) includes a substrate (22) and a coating (24;62) on the substrate. The coating includes at least a first layer (30). The first layer has: a matrix (50); and a filler (52) at 2.0% to 40% by volume in the first layer. The first layer is selected from alkaline earth or transition metal (M) tungstates (MWO4); alkaline earth molybdates (MMoO.sub.4); rare earth (RE) phosphates (REPO.sub.4); and combinations thereof.

A blade outer air seal includes a center web having a radially inner face and a radially outer face, at least one mounting arm extending from the radially outer face, and a coating disposed on the radially inner face. The coating includes an environmental barrier coating layer and an abradable layer disposed on the environmental barrier layer. The abradable layer has a Mohs hardness of 3.5 to 7.5 and the porosity of the abradable layer is chosen in view of the Mohs hardness, which significantly improves the durability of the abradable layer. A gas turbine engine and a method of protecting a blade outer air seal are also disclosed.

A blade outer air seal includes a center web having a radially inner face and a radially outer face, at least one mounting arm extending from the radially outer face, and a coating disposed on the radially inner face. The coating includes an environmental barrier coating layer and an abradable layer disposed on the environmental barrier layer. The abradable layer has a Mohs hardness of 3.5 to 7.5 and the porosity of the abradable layer is chosen in view of the Mohs hardness, which significantly improves the durability of the abradable layer. A gas turbine engine and a method of protecting a blade outer air seal are also disclosed.

Powder compositions are having core-shell structures for use in forming environmental barrier coatings (EBCs) and/or abradable coatings by atmospheric plasma spraying. The shell compositions and thicknesses are selected to provide inner core particle (silicate or phosphate particle) protection from the plasma and plume environments during atmospheric plasma spraying and avoid undesired modification to the particle chemistry during the deposition process. Shell coats can be designed to survive the plasma and plume environments during atmospheric plasma spraying. Alternatively, shell coats can be designed to be consumed during atmospheric plasma spraying.

Powder compositions are having core-shell structures for use in forming environmental barrier coatings (EBCs) and/or abradable coatings by atmospheric plasma spraying. The shell compositions and thicknesses are selected to provide inner core particle (silicate or phosphate particle) protection from the plasma and plume environments during atmospheric plasma spraying and avoid undesired modification to the particle chemistry during the deposition process. Shell coats can be designed to survive the plasma and plume environments during atmospheric plasma spraying. Alternatively, shell coats can be designed to be consumed during atmospheric plasma spraying.