A porous ceramic structure includes a porous honeycomb structure composed primarily of cordierite, and Ce- and Zr-containing particles fixedly attached to the honeycomb structure. The Ce- and Zr-containing particles contain Ce and Zr. The Ce- and Zr-containing particles have a fixedly attached portion located inside the honeycomb structure and a protrusion contiguous with the fixedly attached portion and protruding from the honeycomb structure.

A porous ceramic structure includes a porous honeycomb structure composed primarily of cordierite, and Ce- and Zr-containing particles fixedly attached to the honeycomb structure. The Ce- and Zr-containing particles contain Ce and Zr. The Ce- and Zr-containing particles have a fixedly attached portion located inside the honeycomb structure and a protrusion contiguous with the fixedly attached portion and protruding from the honeycomb structure.

The present invention provides a plasma-resistant ceramic member, which includes a substrate and a ceramic coating layer formed on the substrate, in which the ceramic coating layer includes a lower layer consisting of an oxide formed on the substrate, and a surface layer in which an oxide composition component constituting the surface of the ceramic coating layer is surface-modified with a composition containing one or more anions selected from the group consisting of F.sup.− and Cl.sup.−, wherein the surface layer is a layer in which a raw material containing one or more anions selected from the group consisting of F.sup.− and Cl.sup.− is vaporized by heating and adsorbed to the surface of the ceramic coating layer, and thus modified with a composition containing one or more anions selected from the group consisting of F.sup.− and Cl.sup.−, and a method of manufacturing the same. According to the present invention, the plasma-resistant property, durability, and etching process stability of the ceramic member may be improved with low costs.

Slurry EBC systems and method for fabricating slurry EBC systems for protecting component substrates and extending the longevity of such components are disclosed. The slurry EBC systems include a bond coat having a temperature capability of up to 1482° C. (2700° F.). Example bond coats include a mullite-based bond coat and a rare earth disilicate-based bond coat.

A ceramic matrix composite (CMC) component includes at least one seal surface, the at least one seal surface disposed adjacent an interfacing surface for providing a seal therebetween; and a coating disposed on the seal surface. The coating includes an aluminum oxide and/or a silicon dioxide.

Coated components and their methods of formation are provided. The coated component includes: a ceramic matrix composite substrate comprising silicon carbide and having a surface; a bond coat on the surface of the substrate; and an environmental barrier coating on the bond coat. The bond coat includes a plurality of discrete particles dispersed within a matrix phase that includes mullite. The plurality of discrete particles includes an oxygen getter and a transition metal oxide.

Coated components and their methods of formation are provided. The coated component includes: a ceramic matrix composite substrate comprising silicon carbide and having a surface; a bond coat on the surface of the substrate; and an environmental barrier coating on the bond coat. The bond coat includes a plurality of discrete particles dispersed within a matrix phase that includes mullite. The plurality of discrete particles includes an oxygen getter and a transition metal oxide.

A composition comprising a rare earth solid solution, at least one of HfO.sub.2 and CaZrO.sub.3/MgZrO.sub.3; and balance ZrO.sub.2. The rare earth solid solution may include Gd.sub.2O.sub.3 and Lu.sub.2O.sub.3. In another example, the rare earth solid solution may include Gd.sub.2O.sub.3, Lu.sub.2O.sub.3, and at least one of Yb.sub.2O.sub.3 and Sm.sub.2O.sub.3.

A part includes a substrate, having, adjacent to a surface of the substrate, at least a portion that is made from a material that contains silicon, and an environmental barrier formed on the surface of the substrate, the environmental barrier including at least a first layer including a rare earth disilicate of formula RE.sup.a.sub.2Si.sub.2O.sub.7 present at a molar content lying in the range 70% to 99.9%, where RE.sup.a is a rare earth element; and at least one rare earth oxide of formula RE.sup.b.sub.2O.sub.3 present at a molar content lying in the range 0.1% to 30%, where RE.sup.b is a rare earth element different from RE.sup.a.

A part includes a substrate, having, adjacent to a surface of the substrate, at least a portion that is made from a material that contains silicon, and an environmental barrier formed on the surface of the substrate, the environmental barrier including at least a first layer including a rare earth disilicate of formula RE.sup.a.sub.2Si.sub.2O.sub.7 present at a molar content lying in the range 70% to 99.9%, where RE.sup.a is a rare earth element; and at least one rare earth oxide of formula RE.sup.b.sub.2O.sub.3 present at a molar content lying in the range 0.1% to 30%, where RE.sup.b is a rare earth element different from RE.sup.a.