An article having a substrate that includes a ceramic or a ceramic matrix composite, a bond layer on the substrate that includes silicon metal and a boria stabilizing agent, and at least one additional layer on the bond layer.

The present invention relates to a method for preparing a phase-separated lead telluride-lead sulfide nanopowder using solution synthesis and a phase-separated lead telluride-lead sulfide nanopowder prepared by the method. The method includes: (a) mixing tellurium and a first solvent, followed by ultrasonic irradiation to prepare a tellurium precursor solution; (b) mixing an organosulfur compound and a second solvent, followed by ultrasonic irradiation to prepare a sulfur precursor solution; (c) mixing lead oxide, a third solvent, and a fourth solvent and heating the mixture to prepare a lead precursor solution; (d) adding the tellurium precursor solution to the lead precursor solution and allowing the mixture to react; (e) adding the sulfur precursor solution to the reaction mixture of step (d) and allowing the resulting mixture to react; and (f) cooling the reaction mixture of step (e) to room temperature to prepare a phase-separated lead telluride-lead sulfide nanopowder.

An abrasive particle having a body and a coating overlying the body, the coating including an amorphous material and at least one filler contained within the amorphous material. The abrasive particle may be included in a fixed abrasive article.

A hardfacing composition comprising tungsten carbide particles having a barrier coating and a binder alloy is disclosed. The tungsten carbide particles comprise at least one kind of cast tungsten carbide, carburized tungsten carbide, macro-crystalline tungsten carbide, or sintered tungsten carbide. The barrier coating comprises at least one of metallic carbides, borides, nitrides, or their hybrid compounds. The hardfacing composition takes one of the forms selected from a welding/brazing tube, rod, rope, powder, paste, slurry, or cloth, which are suitable for being applied by various welding or brazing methods. The barrier coating would prevent or mitigate the degradation of the tungsten carbide particles due to attack of a molten binder alloy during a welding or brazing process. One of thermoreactive deposition/diffusion methodshalide activated pack cementation for making tungsten carbide particles having a barrier coating is disclosed.

Disclosed are methods of forming a chamber component for a process chamber. The methods may include filling a mold with nanoparticles or plasma spraying nanoparticles, where at least a portion of the nanoparticles include a core particle and a thin film coating over the core particle. The core particle and thin film are formed of, independently, a rare earth metal-containing oxide, a rare earth metal-containing fluoride, a rare earth metal-containing oxyfluoride, or combinations thereof. The nanoparticles may have a donut-shape having a spherical form with indentations on opposite sides. The methods also may include sintering the nanoparticles to form the chamber component and materials. Further described are chamber components and coatings formed from the described nanoparticles.

A solid electrolyte includes a particle having a first portion that includes, as constituent elements, lanthanum (La), lithium, titanium and oxygen, and a second portion that covers a surface of the first portion and includes, as constituent elements, lanthanum, lithium, titanium and oxygen and in which sulfur is coupled to an oxygen deficient portion and at least a surface is oxidized.

A method of forming a ceramic matrix composite are described herein. The method may include infiltrating a fiber preform with a solution comprising a refractory precursor in solution with a solvent. The refractory precursor may include a compound having at least one refractory metal element. The method may further include removing the solvent from the fiber preform, and reducing the refractory precursor to form a refractory metal that includes the refractory metal element.

Disclosed is a chamber component of a processing chamber, the chamber component comprising a body and a coating on at least one surface of the body. The coating comprises about 89 mol % to about 93 mol % Y.sub.2O.sub.3 and about 7 mol % to about 11 mol % ZrO.sub.2. The coating has a hardness of about 1-50 GPa.

Coated components are provided that include a substrate having a surface; a bondcoat over the surface of the substrate; a thermally grown oxide layer over the bondcoat; and an environmental barrier coating over the thermally grown oxide layer. The bondcoat includes a plurality of core-shell particulates and a plurality of oxide-sintering aid globular phases dispersed within a metalloid-based material matrix. The plurality of core-shell particulates have a shell comprising a metalloid oxide around a core comprising a metalloid-based material. The plurality of oxide-sintering aid globular phases includes a mixture of the metalloid oxide and a sintering aid.