TWO-LAYER HEAT RESISTANT COATING ON ARTICLES FROM CARBON-CARBON COMPOSITE MATERIALS Russian patent published in 2018 - IPC C23C4/10 C04B35/38 C04B41/45 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy and can be used for parts operating simultaneously under wear and impact of conditions of corrosive media, namely for nozzle blades of gas turbine engines that are affected by high-speed gas flows, sudden temperature changes, erosion and corrosion, and air and space vehicles experiencing impact of incoming flow of dissociated air in the atmosphere at speed above 2,000 m/s. Two-layer heat-resistant coating on products made of carbon-carbon composite materials contains heat-resistant sub-layer and outer layer of stabilized zirconia (ZrO₂-Y₂O₃), while sub-layer is made of nickel alloy Ni23Co20Cr8AlY, and outer layer additionally contains molybdenum disilicide (MoSi₂) with the following component ratio, wt.%: stabilized zirconia (ZrO₂-Y₂O₃) – 10–20, molybdenum disilicide (MoSi₂) – the rest, with outer coating layer (MoSi₂-ZrO₂-Y₂O₃) having thickness of 250–300 mcm, and sublayer (Ni23Co20Cr8AlY) – 20–40 mcm.

EFFECT: invention is directed to coating having self-healing effect and to reducing thermal stresses of coating layers.

1 cl, 1 ex, 2 tbl