MULTILAYER HEAT-RESISTANT COATING ON ARTICLES FROM CARBON-CARBON COMPOSITE MATERIALS Russian patent published in 2017 - IPC C23C30/00 C04B35/84 C23C14/06 

FIELD: chemistry.

SUBSTANCE: heat-resistant multilayer coating on a product of carbon-carbon composite material comprises a layer of ZrN, applied on the product, the middle layer of Ni₂₂Cr₁₀AlY and an outer heat-insulating layer based on a system of aluminium oxide - titanium oxide. The outer layer further comprises lanthanum hexaboride in the following ratio of components in the layer, wt %: lanthanum hexaboride (LaB₆) 0.5-5.0, titanium oxide (TiO₂) 2.0-3.0, alumina (Al₂O₃) - the rest, wherein the thickness of the coating layers: a layer of ZrN, Ni₂₂Cr₁₀AlY layer and a layer of Al₂O₃-TiO₂-LaB₆ refer to each other as 1:2.5:5.

EFFECT: increase in hardness of the coating and its adhesion to the substrate when the coating density and reducing the thermal expansion coefficient.

1 ex,1 tbl