At least a part of a burner for a catalytic reactor is coated with a silicate based nickel aluminide slurry diffusion coating.

The present invention relates to a method of producing a component of an Mo base alloy which is protected against high-temperature oxidation, and a correspondingly produced component.

The method comprises: provision of a semifinished part composed of a Mo base alloy, provision of an Si-containing slip or of a Si-containing powder, application of the slip to the semifinished part and diffusion annealing of the semifinished part together with the applied slip to form a Si-containing outer layer or transfer of at least part of the silicon present in the powder via the gas phase to the semifinished part by means of a diffusion heat treatment of the semifinished part together with the Si-containing powder which is arranged at a distance from the semifinished part.

A lining structure for a refractory vessel contains a first layer containing refractory material; a second layer, in communication with and parallel to the first layer, containing a metal layer or component; and a third layer, in communication with and parallel to the second layer, containing refractory material. The metal component in the second layer contains filled transverse passages, between the surface of the second layer in contact with the first layer and the surface of the second layer in contact with the third layer, producing support structures to maintain the structural integrity of the refractory vessel in use.

The invention relates to a method tor protecting a hafnium-free, nickel-based monocrystalline superalloy part (1) against corrosion and oxidation. Said method is characterized in that it involves at least the steps of: -manufacturing a hafnium-free, nickel-based monocrystalline superalloy part (1); -depositing a first hafnium-containing layer (2), an undercoat made of an alloy containing at least 10 atom % aluminum, and a second hafnium-containing layer on the part (1) such that a mixed layer (3) is formed, and depositing a third hafnium-containing layer (4) on the part (1); -performing a diffusion treatment in order for the first (2) and third (4) layers to diffuse such that a first interdiffusion region (21) is formed on the top portion of the part (1) and a second interdiffusion region (41) is formed on the surface of the mixed layer (3); -subjecting the second interdiffusion region (41) to an oxidation treatment so as to obtain a hafnium-doped alumina layer (42).

A chain element (2), in particular a chain pin (4), for joining at least two chain links (3), characterized in that it comprises a surface layer (5) containing boron and vanadium, formed by at least one step of diffusing boron and vanadium in the areas of the chain element (2) which are close to the surface. The surface layer (5) containing boron and vanadium is formed by boriding and subsequently vanadizing a substrate material having a carbon content of 0.60 wt.-% to 1.0 wt.-%.

A chain element (2), in particular a chain pin (4), for joining at least two chain links (3), characterized in that it comprises a surface layer (5) containing boron and vanadium, formed by at least one step of diffusing boron and vanadium in the areas of the chain element (2) which are close to the surface. The surface layer (5) containing boron and vanadium is formed by boriding and subsequently vanadizing a substrate material having a carbon content of 0.60 wt.-% to 1.0 wt.-%.

Described are methods of depositing a titanium aluminum nitride film on a substrate surface with a controlled amount of carbon. The methods include exposing a substrate surface to a titanium precursor, a nitrogen reactant and an aluminum precursor with purges of the unreacted titanium and aluminum precursors and unreacted nitrogen reactants between each exposure.

Described are methods of depositing a titanium aluminum nitride film on a substrate surface with a controlled amount of carbon. The methods include exposing a substrate surface to a titanium precursor, a nitrogen reactant and an aluminum precursor with purges of the unreacted titanium and aluminum precursors and unreacted nitrogen reactants between each exposure.

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.

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.