PART COMPRISING A SUBSTRATE AND A PROTECTIVE BARRIER Russian patent published in 2021 - IPC C04B41/87 C04B41/89 

FIELD: coating.

SUBSTANCE: invention relates to creation of a barrier coating on a part used at high temperatures in an oxidising and humid environment, constituting, e.g., a part of a gas turbine. The part comprises a substrate made of a composite material with at least a silicon-containing section adjacent to the surface and a protective barrier made on the surface of the substrate. The protective barrier comprises at least a first layer constituting a system of rare earth element disilicate with the formula RE^a₂Si₂O₇ at a molar content in the range of 70 to 99.9%, wherein RE^a is a rare earth element; and at least one rare earth element oxide with the formula RE^b₂O₃ at a molar content in the range of 0.1 to 30%, wherein RE^b is a rare earth element other than RE^a.

EFFECT: technical result of the invention is increased service life of the part in operation.

14 cl, 6 dwg, 1 ex