METHOD FOR SPUTTERING OF PROTECTIVE COATINGS FOR AN INTERMETALLIC ALLOY BASED ON TITANIUM GAMMA-ALUMINIDE Russian patent published in 2020 - IPC C23C4/04 C23C4/12 

FIELD: technological processes.

SUBSTANCE: invention relates to methods of protection of alloyed titanium-aluminide-based alloys with prevailing γ-TiAl phase. Alloys of this type feature low density, high specific strength and resistance to oxidation and are intended for making structures operating at high temperatures and loads. On surface of article from said alloy there is applied powder with content of components, wt %: Co 20–26, Cr 18–23, Al 6–11, Y 0.3–0.9, Ta 2–6, Ni – balance using high-speed gas-flame spraying technology. Ratio of kerosene to oxygen is chosen 1:1, pressure in combustion chamber is more than 4.9 MPa, rate of powder supply is 12–16 g/min. Sputtering distance is 250–350 mm, and movement speed along alloy surface is 0.3–0.7 m/s. A coating with thickness of not less than 150 mcm is obtained.

EFFECT: method increases heat resistance of alloy based on TiAl to 920 °C, high mechanical properties at room temperature and operating temperature.

1 cl, 2 dwg, 1 tbl, 1 ex