METHOD OF DEPOSITING ALUMINIUM OXIDE COATING ON SILICON CARBIDE-COATED SUBSTRATE Russian patent published in 2012 - IPC G01N27/04 C23C4/10 C23C16/32 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of depositing aluminium oxide coating onto a component having a silicon carbide (SiC) surface and used in high-temperature processes. An adhesive silicon (20) sublayer is deposited by vacuum plasma sputtering onto a SiC surface of a component which is formed by a substrate (10) which is coated by a silicon carbide (SiC) layer (12) deposited by chemical vapour deposition. Aluminium oxide coating (30) is deposited on the sublayer (20) by atmospheric thermal spraying. A strain gauge (40) with a free thread on the coating (30) is placed, wherein that strain gauge is held by a support having openings. A second aluminium oxide coating (50) is deposited by atmospheric thermal spraying onto the strain gauge (40) and on the coating (30) through said openings, with subsequent removal of the support. A third aluminium oxide coating (60) is deposited by atmospheric thermal spraying onto the first coating (30), the second coating (50) and the strain gauge (40) to form a device for measuring deformation in form of block of aluminium coating (30, 50, 60) layers with an embedded strain gauge.

EFFECT: improved durability of the boundary surface between the component and the coating, minimising mechanical stress on the boundary surface during thermal loads.

5 cl, 3 dwg