COMBINED PROTECTIVE COATING Russian patent published in 2022 - IPC C23C28/04 C23C14/08 

FIELD: material engineering.

SUBSTANCE: invention can be used in metallurgy, the nuclear power, space and other industries where it is required to maintain the operability of parts when exposed to an aggressive environment with a temperature of 800-1000°C. The combined protective coating for the metal base contains an adhesive layer of tungsten, an inner protective ceramic layer of two layers of zirconium dioxide ZrO₂ or gadolinium oxide Gd₂O₃ and an outer protective layer based on tungsten glass. The first layer of the inner protective ceramic layer is made with a thickness of 25-40 microns and is applied from a powder with a fraction of 40-100 microns, the second layer is made with a thickness of 20-35 microns and is applied from a powder with a fraction of 5-25 microns. The porosity of the plasma coating is reduced while maintaining the protective properties of the coating as a whole, as well as improving the cohesive and adhesive strength of the coating while simplifying the technology of creating a combined coating.

EFFECT: extension of the range of combined protective coatings.

1 cl, 4 dwg