A coating including a bond layer deposited on a substrate. The bond layer includes a rare earth silicate and a second phase, the second phase including at least one of silicon, silicides, alkali metal oxides, alkali earth metal oxides, glass ceramics, Al.sub.2O.sub.3, TiO.sub.2, Ta.sub.2O.sub.5, HfO.sub.2, ZrO.sub.2, HfSiO.sub.4, ZrSiO.sub.4, HfTiO.sub.4, ZrTiO.sub.4, or mullite. The coating may provide thermal and/or environmental protection for the substrate, especially when the substrate is a component of a high-temperature mechanical system.

A device comprising: a substrate; a first coating deposited on the substrate; an intermediate coating deposited on the first coating, wherein the first coating is interposed between the substrate and the intermediate coating; and a second coating deposited on the intermediate coating, wherein the intermediate coating is interposed between the first coating and the second coating, and the second coating is outermost and black. The substrate, the first coating, the intermediate coating and the second coating define at least one of a jewelry item and a component of a jewelry item.

A component for exposure to a combustion chamber of a diesel engine and/or exhaust gas, such as a cylinder liner or valve face, is provided. The component includes a thermal barrier coating applied to a body portion formed of steel. A layer of a metal bond material can be applied first, followed by a mixture of the metal bond material and a ceramic material, optionally followed by a layer of the ceramic material. The ceramic material preferably includes at least one of ceria, ceria stabilized zirconia, yttria stabilized zirconia, calcia stabilized zirconia, magnesia stabilized zirconia, and zirconia stabilized by another oxide. The thermal barrier coating is applied by thermal spray or HVOF. The thermal barrier coating has a porosity of 2% by vol. to 25% vol., a thickness of less than 1 mm, and a thermal conductivity of less than 1.00 W/m.Math.K.

A component for an engine is provided. The component includes a thermal barrier coating applied to a body portion formed of metal, such as steel or another ferrous or iron-based material. According to one embodiment, a bond layer of a metal is applied to the body portion, followed by a mixed layer of metal and ceramic with a gradient structure, and then optionally a top layer of metal. The thermal barrier coating can also include a ceramic layer between the mixed layer and top layer, or as the outermost layer. The ceramic includes at least one of ceria, ceria stabilized zirconia, yttria, yttria stabilized zirconia, calcia stabilized zirconia, magnesia stabilized zirconia, and zirconia stabilized by another oxide. The thermal barrier coating can be applied by thermal spray. The thermal barrier coating preferably has a thickness less than 200 microns and a surface roughness Ra of not greater than 3 microns.

A micromechanic structure includes a substrate, an adhesion layer arranged on the substrate, a first metal layer arranged on the adhesion layer, a ferroelectric layer arranged on the first metal layer and including lead zirconate titanate, and a second metal layer arranged on the ferroelectric layer, wherein the lead concentration of the ferroelectric layer decreases in a stepped manner with increasing distance from the first metal layer such that the ferroelectric layer includes a plurality of partial layers in which the lead concentration is respectively uniform.

Superalloy workpiece including a superalloy substrate and an interface layer (IF-1) of essentially the same superalloy composition directly on a surface of the superalloy substrate, followed by a transition layer (TL) of essentially the same superalloy and supperalloy oxides or a different metal composition and different metal oxides whereby oxygen content of the transition layer is increasing from IF-1 towards a barrier layer (IF-2) of super alloy oxides or of different metal oxides.

An article for high temperature service is presented. The article includes a substrate and a plurality of coatings disposed on the substrate. At least one coating in the plurality of coatings includes an oxide of nominal composition A.sub.xB.sub.1-yD.sub.yO.sub.z, wherein A includes a rare-earth element, B includes tantalum or niobium, D includes zirconium or hafnium, 2x3, 0<y<1, and 6z7.

A substrate for a flexible device which includes a stainless steel sheet, a nickel plating layer formed on a surface of the stainless steel sheet, and a glass layer of electrical insulating bismuth-based glass formed in the form of layer on a surface of the nickel plating layer.

The invention relates to a coated body and to a method for coating a body. The coated body comprises at least a substrate (22), a diamond layer (24) having a thickness of 1-40 m, and a hard material layer (26), which is arranged farther outside on the body (10) than the diamond layer (24). The hard material layer (26) comprises at least one metal element and at least one non-metal element. An adhesive layer (32) having a thickness of 2-80 nm is provided between the diamond layer (24) and the hard material layer (26). The adhesive layer (32) contains carbon and at least one metal element. The diamond layer (24) can be applied by means of a CVD method. The hard material layer can be applied by means of a PVD method. The adhesive layer (32) between the diamond layer (24) and the hard material layer (26) can be produced in that, before the hard material layer (26) is applied, the surface of the diamond layer (24) is pretreated by means of HIPIMS metal ion etching, wherein ions are implanted into or diffuse into the surface of the diamond layer (24) by means of metal ion etching.

A method of forming an abradable coating includes forming a plasma; introducing a coating material, as a powder having particles in the range between 1 and 50 m, carried by a delivery gas into the plasma, having a sufficiently high specific enthalpy for at least partially melting some of the powder and vaporizing at least 5% by weight of the powder, to form a vapor phase cloud of vapor and particles; forming a plasma beam by maintaining a process pressure between 50 and 2000 Pa; defocussing the plasma beam by maintaining a process pressure between 50 and 2000 Pa; and forming from the vapor phase cloud an abradable coating, comprising columnar structures. Advantageously, the columnar structured abradable coating has an erosion resistance smaller than 30 s/mils, preferably in the range of 5 to 27 s/mils, more preferably in the range 10-25 s/mils, still more preferably in the range 15-20 s/mils.