APPLICATION METHOD OF COMBINED THERMAL PROTECTIVE COATING TO PART FROM HEAT-RESISTANT ALLOYS Russian patent published in 2012 - IPC C23C28/04 

FIELD: metallurgy.

SUBSTANCE: method involves chrome aluminising in powder mixture, further thermal vacuum treatment by means of hardening so that chrome-aluminised layer is obtained, which consists of β+y - phases; sputtering of ceramic layer of columnar structure, which contains ZrO₂-8Y₂O₃, on the part by means of electron-beam method; application to it of dense ceramic coating layer containing ZrO₂-11Y₂O₃-(20-25)Al₂O₃-(10-12)81-(5-8)Hf with thickness of 10-15 mcm by means of electron-beam method, and carrying out of diffusion annealing with formation of the coating consisting of [ZrO₂-11 Y₂O₃-(20-25)Al₂O₃-(10-12)Si-(5-8)Hf]-(ZrO₂-8Y₂O₃)-β+y' - phase.

EFFECT: improving durability and reliability of parts of engines operating under conditions of variable thermomechanical loads and high-temperature oxidation.

6 dwg, 1 ex