A technique is described for the application of three-dimensional (3D) relief to a substrate such as a ceramic tile using digital inkjet technology. In an example embodiment, the introduced technique includes application of binder ink to a portion of the surface of a substrate using a digital inkjet process. This binder ink forms a barrier layer which protects the portion of the surface of the substrate. Next, a brushing process is applied to remove unprotected portions of the substrate, thereby forming the 3D relief in the substrate.

Example techniques may include depositing a slurry on at least a predetermined surface region of a ceramic matrix composite substrate. The slurry may include a solvent and particles comprising at least one of silicon metal or silicon carbide. The slurry may be dried to form a wicking layer on the predetermined surface region. The ceramic matrix composite substrate and the wicking layer may be heated to a temperature of at least 900 C. to wick at least one wickable species from the ceramic matrix composite substrate into the wicking layer. Substantially all of the wicking layer may be removed from the predetermined surface region. Example articles may include a ceramic matrix composite substrate. A wicking layer may be disposed on at least a predetermined surface region of the ceramic matrix composite substrate. The wicking layer may include at least one wicked species wicked from the ceramic matrix composite substrate.

Example techniques may include depositing a slurry on at least a predetermined surface region of a ceramic matrix composite substrate. The slurry may include a solvent and particles comprising at least one of silicon metal or silicon carbide. The slurry may be dried to form a wicking layer on the predetermined surface region. The ceramic matrix composite substrate and the wicking layer may be heated to a temperature of at least 900 C. to wick at least one wickable species from the ceramic matrix composite substrate into the wicking layer. Substantially all of the wicking layer may be removed from the predetermined surface region. Example articles may include a ceramic matrix composite substrate. A wicking layer may be disposed on at least a predetermined surface region of the ceramic matrix composite substrate. The wicking layer may include at least one wicked species wicked from the ceramic matrix composite substrate.

An etchant composition is presented. The composition includes: 18 wt % to 25 wt % of a first organic acid compound; 15 wt % to 20 wt % of a second organic acid compound; 8.1 wt % to 9.9 wt % of an inorganic acid compound; 1 wt % to 4.9 wt % of a sulfonic acid compound; 10 wt % to 20 wt % of a hydrogen sulfate salt compound; 1 wt % to 5 wt % of a nitrogen-containing dicarbonyl compound; 1 wt % to 5 wt % of an amino acid derivative compound; 0.1 wt % to 2 wt % of an iron-containing oxidizing agent compound; and a balance amount of water.

An etchant composition is presented. The composition includes: 18 wt % to 25 wt % of a first organic acid compound; 15 wt % to 20 wt % of a second organic acid compound; 8.1 wt % to 9.9 wt % of an inorganic acid compound; 1 wt % to 4.9 wt % of a sulfonic acid compound; 10 wt % to 20 wt % of a hydrogen sulfate salt compound; 1 wt % to 5 wt % of a nitrogen-containing dicarbonyl compound; 1 wt % to 5 wt % of an amino acid derivative compound; 0.1 wt % to 2 wt % of an iron-containing oxidizing agent compound; and a balance amount of water.

A process for providing a topography to the surface of a dental implant, the surface being made of a ceramic material having yttria-stabilized zirconia, the process including: providing a macroscopic roughness to the surface of the dental implant by a mechanical process and/or injection molding technique; and etching at least a part of the roughened surface, wherein etching is carried out using an etching solution having hydrofluoric acid at a temperature of 70 C. at least, such that discrete grains or agglomerates of grains are removed from the yttria-stabilized zirconia, thereby forming recesses and cavities in the roughened surface is disclosed.

A process for providing a topography to the surface of a dental implant, the surface being made of a ceramic material having yttria-stabilized zirconia, the process including: providing a macroscopic roughness to the surface of the dental implant by a mechanical process and/or injection molding technique; and etching at least a part of the roughened surface, wherein etching is carried out using an etching solution having hydrofluoric acid at a temperature of 70 C. at least, such that discrete grains or agglomerates of grains are removed from the yttria-stabilized zirconia, thereby forming recesses and cavities in the roughened surface is disclosed.

This disclosure provides a method of pressure sintering an environmental barrier coating on a surface of a ceramic substrate to form an article. The method includes the steps of etching the surface of the ceramic substrate to texture the surface, disposing an environmental barrier coating on the etched surface of the ceramic substrate wherein the environmental barrier coating includes a rare earth silicate, and pressure sintering the environmental barrier coating on the etched surface of the ceramic substrate in an inert or nitrogen atmosphere at a pressure of greater than atmospheric pressure such that at least a portion of the environmental barrier coating is disposed in the texture of the surface of the ceramic substrate thereby forming the article.

This disclosure provides a method of pressure sintering an environmental barrier coating on a surface of a ceramic substrate to form an article. The method includes the steps of etching the surface of the ceramic substrate to texture the surface, disposing an environmental barrier coating on the etched surface of the ceramic substrate wherein the environmental barrier coating includes a rare earth silicate, and pressure sintering the environmental barrier coating on the etched surface of the ceramic substrate in an inert or nitrogen atmosphere at a pressure of greater than atmospheric pressure such that at least a portion of the environmental barrier coating is disposed in the texture of the surface of the ceramic substrate thereby forming the article.

This invention discloses a green environment-friendly removing device for porcelain glaze based on defective enamels, including a main body, a reaction cavity with an upward opening formed in the main body and a supporting plate slidably arranged between the inner walls in the reaction cavity, and an enamel residual product can be placed on the supporting plate, and a porcelain glaze removing mechanism capable of enabling the enamel residual defective product to generate chemical reaction and remove the porcelain glaze is arranged in the reaction cavity, has a very optimized reworking effect; does not need a mechanical reworking process and does not need to worry about the pollution environment, so that the porcelain glaze removal process of the whole enamel defective product is simple and trouble-saving; some wastes generated after processing can be collected and utilized, and all generated waste liquid wastes can reach emission standard and green and environment-friendly.