A coated part includes a metallic substrate, a thermal barrier comprising a ceramic material and covering the metallic substrate, wherein the coated part further includes a protective coating covering the thermal barrier, the protective coating including, in a first region, a first MAX phase, denoted PZ2, of formula (Zr.sub.xTi.sub.1-x,).sub.2AlC or a first MAX phase, denoted PC2, of formula (Cr.sub.xTi.sub.1-x,).sub.2AlC with x non-zero and less than or equal to 1 in the MAX phases PZ2 and PC2, and the protective coating includes, in a second region covering the first region, a second MAX phase of formula Ti.sub.2AlC.

A method of nitridation includes cyclically performing the following steps in situ within a processing chamber at a temperature less than about 400° C.: treating an unreactive surface of a substrate in the processing chamber to convert the unreactive surface to a reactive surface by exposing the unreactive surface to an energy flux, and nitridating the reactive surface using a nitrogen-based gas to convert the reactive surface to a nitride layer including a subsequent unreactive surface.

A method of nitridation includes cyclically performing the following steps in situ within a processing chamber at a temperature less than about 400° C.: directing an energy flux to a localized region of an unreactive surface of a substrate to convert the localized region of the unreactive surface to a localized reactive region: and selectively nitridating the localized reactive region using a nitrogen-based gas to convert the localized reactive region to a nitride layer.

A coating process for applying a bifurcated coating to an article is disclosed including applying an aluminizing slurry to a first portion of the article, applying a chromizing slurry to a second portion of the article, and simultaneously heat treating the article, the aluminizing slurry, and the chromizing slurry. Heat treating the aluminizing slurry forms an aluminide coating on the first portion of the article and an aluminide diffusion zone between the article and the aluminide coating. Heat treating the chromizing slurry forms a chromide coating on the second portion of the article and a chromide diffusion zone between the article and the chromide coating. The first portion and the second portion are both maintained in an unmasked state while applying the aluminizing slurry and the chromizing slurry and during the heat treating.

A method of forming a protective coating. The method includes providing a substrate including at least one chemical element and a surface; forming a basecoat composition including an aluminium phase including aluminium;

applying the basecoat composition on the surface of the substrate to form a basecoat layer; heating the basecoat layer to a first temperature for a predetermined period of time; applying a glow discharge plasma on the basecoat layer; and heating the basecoat layer to a second temperature greater than the first temperature, in order to activate an exothermic reaction between at least the aluminium phase of the basecoat layer and the at least one chemical element of the substrate, wherein the exothermic reaction forms the protective coating on the surface of the substrate.

The present invention relates to a slip for producing an aluminum diffusion layer which comprises an Al-containing powder and an Si-containing powder and a binder, the slurry further comprising an Al-containing powder the powder particles of which are coated with Si. The invention further relates to a process for producing an aluminum diffusion layer, comprising the following steps: providing a slurry according to any one of the preceding claims, applying the slurry to a component surface on which the aluminum diffusion layer is to be created, drying and/or curing by way of a heat treatment at a first temperature, and diffusion annealing at a second temperature.

The present invention relates to a slip for producing an aluminum diffusion layer which comprises an Al-containing powder and an Si-containing powder and a binder, the slurry further comprising an Al-containing powder the powder particles of which are coated with Si. The invention further relates to a process for producing an aluminum diffusion layer, comprising the following steps: providing a slurry according to any one of the preceding claims, applying the slurry to a component surface on which the aluminum diffusion layer is to be created, drying and/or curing by way of a heat treatment at a first temperature, and diffusion annealing at a second temperature.

A coating system for a surface of a superalloy component is provided. The coating system includes a MCrAlY coating on the surface of the superalloy component, where M is Ni, Fe, Co, or a combination thereof. The MCrAlY coating generally has a higher chromium content than the superalloy component. The MCrAlY coating also includes a platinum-group metal aluminide diffusion layer. The MCrAlY coating includes Re, Ta, or a mixture thereof. Methods are also provided for forming a coating system on a surface of a superalloy component.

A system and method for treating a cavity comprises arranging a niobium structure in a coating chamber, the coating chamber being arranged inside a furnace, coating the niobium structure with tin thereby forming an Nb.sub.3Sn layer on the niobium structure, and doping the Nb.sub.3Sn layer with nitrogen, thereby forming a nitrogen doped Nb.sub.3Sn layer on the niobium structure.

Provide a metal surface reforming method enabling metallic products with superior characteristics such as surface hardness, heat resistance, corrosion resistance, high temperature oxidation, high temperature corrosion, and environmental corrosion and the like.

Halogenation treatment of heating and retaining a base material in an atmosphere containing a halogen based gas is performed on a base material of iron based metal or nickel based metal, then nitride processing of heating and retaining the halogenated base material described above in an atmosphere containing a nitrogen source gas is performed, then chromizing treatment is performed by placing the nitrided base material in a powder containing metal chromium powder to form a surface reformed layer on the base material described above. These metallic products obtained have high hardness, superior heat resistance and corrosion resistance, and exhibit superior performance in high temperature oxidation, high temperature corrosion, erosion, and cavitation and the like environments. Further, the metallic products described above exhibit superior performance in acid or alkali environments, neutral environments, and corrosive environments such as chlorides like salt water.