INTERFACIAL DIFFUSION BARRIER LAYER INCLUDING IRIDIUM ON METALLIC SUBSTRATE Russian patent published in 2015 - IPC C23C28/02 F01D5/28 

FIELD: chemistry.

SUBSTANCE: invention relates to coatings for substrates made of superalloys and can be used for articles in the form of a disc or gas turbine divider. Said article comprises a substrate made of a nickel-based superalloy, containing 2-5 wt % aluminium and 2-5 wt % titanium, wherein the substrate made of a nickel-based superalloy contains 40-55 vol % γ′ precipitated phase, a diffusion barrier layer on the substrate, containing mostly iridium, and a protective layer on the diffusion barrier layer, containing at least one element selected from aluminium or chromium. A method of producing a high-temperature corrosion-resistant coating on said article includes applying a diffusion barrier layer on said substrate made of a nickel-based superalloy and applying a protective layer on the diffusion barrier layer.

EFFECT: providing oxidative or high-temperature corrosion resistance of the substrate surface.

25 cl, 3 dwg, 2 ex