METHOD OF PRODUCING A GRADIENT NANOCOMPOSITE HEAT-SHIELDING COATING Russian patent published in 2020 - IPC C23C4/04 C23C14/00 B82Y30/00 C23C4/11 C23C14/08 

FIELD: metallurgy.

SUBSTANCE: invention relates to powder metallurgy, particularly to methods of producing gradient nanocomposite heat-protective coatings for parts subjected to high-temperature gas flows in aircraft, aerospace engineering and machine building. Method of obtaining a gradient coating involves plasma deposition in a dynamic vacuum of nickel-based alloy powder, zirconium oxide powder and hafnium oxide powder onto the protected surface. After application of nickel-based alloy powder, its application is continued with addition of zirconium oxide powder. Ratio of said powders in the formed mixture is gradually changed to achieve their equal ratio. Then, zirconium oxide powder is applied, and hafnium oxide powder is added without stopping its application. Ratio of said powders in the formed mixture is gradually changed similarly. At the final stage, powder of hafnium oxide stabilized with yttrium oxide is applied.

EFFECT: high strength of adhesion and thermal resistance of the coating.

1 cl, 3 dwg