COATING FOR COMPONENT FOR PROTECTION FROM ENVIRONMENTAL EFFECTS AND METHOD OF PRODUCING SAID COATING Russian patent published in 2011 - IPC B32B18/00 B32B7/02 C04B41/89 C01B33/149 F01D1/00 

FIELD: chemistry.

SUBSTANCE: invention can be used in machine building and power engineering when making components for gas-turbine engines. The environmental protection coating (10) for components, containing silicon, having a first coefficient of thermal expansion, contains a silicon levelling layer (30) which is bound with at least part of the outer surface of the component. An intermediate layer (25, 27, 29) is bound with the silicon levelling layer (30) and has a second coefficient of thermal expansion matched with the first coefficient of thermal expansion. The intermediate layer (25, 27, 29) has a common composition RE₂Si₂O₇. The protective layer (36) is bound with the intermediate layer (25, 27, 29) and has a common composition RE₂SiO₅. Destruction-resistant surface layer (35) has a surface layer (38) bound with the protective layer (36). The surface layer (38) contains RE and has ratio of RE to oxygen equal to at least 2:3. RE is at least one element from Y, Tb, Dy, Ho, Er, Tm, Yb, Lu. Thickness of the intermediate layer (25, 27, 29) is approximately equal to 0.0762-0.254 mm. Thickness of the destruction-resistant surface layer (35) is equal to approximately 0.0127-0.0508 mm.

EFFECT: high resistance of the component to water vapour and oxidation.

10 cl, 1 dwg, 1 tbl