COMBUSTION CHAMBER Russian patent published in 2025 - IPC C23C28/02 C23C4/73 C23C4/11 C23C4/134 

FIELD: chemistry.

SUBSTANCE: invention relates to combustion chamber with multilayer coating applied on its inner surface. Combustion chamber contains sublayer from alloy of NiCoCrAlY system with thickness of 150–200 mcm, intermediate ceramic layer based on zirconium dioxide from ZrO₂-Dy₂O₃ thickness of 200–250 mcm and upper ceramic layer of Gd₂Zr₂O₇ thickness of 20–50 mcm. Roughness of said sublayer is Ra 5–6 mcm. Roughness of intermediate ceramic layer ZrO₂-Dy₂O₃ - Ra 5.5–7 mcm. Roughness of the upper ceramic layer Gd₂Zr₂O₇ - Ra 4–5 mcm.

EFFECT: long-term operation, including thermal cyclic effects, of a heat-protective coating for a combustion chamber with a ceramic layer, which is at temperature of 1100–1200 °C has no phase transformations.

1 cl, 3 ex