A thermal barrier coating includes a highly porous layer and a dense layer. The highly porous layer is formed on a heat-resistant base, is made of ceramic, has pores, has a layer thickness of equal to or larger than 0.3 mm and equal to or smaller than 1.0 mm, and has a pore ratio of equal to or higher than 1 vol % and equal to or lower than 30 vol %. The dense layer is formed on the highly porous layer, is made of ceramic, has a pore ratio of equal to or lower than 0.9 vol % that is equal to or lower than the pore ratio of the highly porous layer, and has a layer thickness of equal to or smaller than 0.05 mm.

The object of the present invention is to produce a metal part equipped with a protection system, particularly for turbine blades for aircraft engines, having a thermal barrier that is improved in terms of thermal properties, adhesion to the part and resistance to oxidation/corrosion. In order to achieve this, the method according to the invention produces in a single step, from specific ceramics, coating layers using SPS technology.

According to one embodiment, a metal part is produced according to an SPS flash sintering method and comprises a superalloy substrate (22), a metal sub-layer (21), a TGO oxide layer (25) and the thermal barrier (23) formed by said method from at least two chemically and thermally compatible ceramic layers (2a, 2b).

A first ceramic (2a), referred to as the inner ceramic, is designed to have a substantially higher expansion coefficient. The outer ceramic (2b) is designed to have at least lower thermal conductivity, and a sintering temperature and/or maximum operating temperature that is substantially higher. The thermal barrier (23) has a composition and porosity gradient (3) from the metal sub-layer (21) to the outer ceramic (2b).

Disclosed is a hard film based on tungsten carbide excellent in wear resistance, wherein the composition of the film is defined by W.sub.1-x-yC.sub.xM.sub.y, where 0.01y0.2, 0.50x/(1xy)4.0, and M is one or more selected from Co, Ni, Fe and Cu.

A coating including a CMAS-resistant layer with a rare earth oxide. The CMAS-resistant layer is essentially free of zirconia and hafnia, and may further include at least one of alumina, silica, and combinations thereof.

A method includes casting a metallic material (56) in a mold (20) containing a core, the core having a substrate (40, 44) coated with a coating (42). A removing of the metallic material from the mold and decoring leaves a casting having a layer formed by the coating. The coating has a ceramic having a porosity in a zone (50) near the substrate less than a porosity in a zone (52) away from the substrate.

In one aspect, a calcium-magnesium alumino-silicate (CMAS)-resistant coating includes an outer coating having a plurality of columnar structures formed during material deposition due to preferential material accumulation and a plurality of generally vertically-oriented gaps separating adjacent columnar structures. The columnar structures include a plurality of randomly-oriented particle splats and a CMAS-reactive material and have a total porosity of less than five percent. The plurality of generally vertically-oriented gaps extend from an outermost surface of the outer coating to a first depth of the outer coating equal to or less than a total thickness of the outer coating. The vertically-oriented gaps have a median gap width of less than five micrometers.

The present invention relates to a decorative part, comprising an electroplated layer array applied to a plastic substrate. On the electroplated layer array, a PVD layer array having an adhesive layer, a mixed layer and a color-providing cover layer is provided, wherein the mixed layer provides for durability, in particular corrosion protection, and the necessary hardness of the surface.

A method of applying a coating system to a substrate includes applying a first layer of a high hardness and high modulus of elasticity with an added metal to the substrate, applying a second layer of the high hardness and high modulus of elasticity in combination with the added metal to the first layer. A percent by volume of the added metal in the second layer is lower than the percent by volume of the added metal in the first layer. The method also includes applying two or more intermediate layers formed from an applied mixture of the high hardness, high modulus of elasticity material and a metal material between the first layer and the second layer.

An AlFe alloy coated steel sheet includes a base steel sheet and an alloy coating layer, wherein the base steel sheet includes, by wt %, C: 0.1%0.5%, Si: 0.01%2%, Mn: 0.01%10%, P: 0.001%0.05%, S: 0.0001%0.02%, Al: 0.001%1.0%, N: 0.001%0.02%, and the balance of Fe and other impurities, wherein the alloy coating layer includes: an AlFe alloy layer I formed on the base steel sheet and having a Vickers hardness of 200800 Hv; an AlFe alloy layer III formed on the AlFe alloy layer I and having a Vickers hardness of 7001200 Hv; and an AlFe alloy layer II formed in the AlFe alloy layer III continuously or discontinuously in a length direction of the steel sheet, and having a Vickers hardness of 400900 Hv, wherein an average oxygen content at a depth of 0.1 m from a surface of the oxide layer is 20% or less by weight.

A composition and method of kinetically depositing the composition to form a coating onto an exterior surface of a zirconium alloy cladding of a light water nuclear reactor which at least partially adheres to the exterior surface. The coating composition includes a first component and a second component. The first component is selected from the group consisting of zirconium, zirconium oxide and mixtures thereof. The second component is selected from the group consisting of Zr.sub.2AlC ceramic, Ti.sub.2AlC ceramic, Ti.sub.3AlC.sub.2 ceramic, Al.sub.2O.sub.3, aluminum, zirconium silicide, amorphous and semi-amorphous alloyed stainless steel, and mixtures of Zr.sub.2AlC ceramic, Ti.sub.2AlC ceramic and Ti.sub.3AlC.sub.2 ceramic. The coating has a gradient emanating from the exterior surface of the cladding toward an exposed outer surface of the coating such that percent by weight of the first component decreases and the second component increases from the exterior surface of the cladding toward the exposed outer surface of the coating.