METHOD OF PRODUCING A COATING BASED ON AlO WITH A PHASE OF γ-AlO BY VACUUM-ARC DEPOSITION Russian patent published in 2025 - IPC C23C14/08 C23C14/24 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of applying a coating based on Al₂O₃ with a phase γ-Al₂O₃ on the cutting tool. Ion cleaning is carried out with a high-current plasma source with a hollow cathode while heating the cutting tool to temperature of 400-450°C in argon protective gas medium. Then ion cleaning is carried out using aluminium electric arc evaporators with heating of cutting tool to temperature of 450-490°C in argon protective gas medium. Oxygen is then introduced into the chamber and working pressure of 4⋅10^-1 Pa. Vacuum-arc evaporation of aluminium electric-arc evaporators is carried out in a mixture of oxygen and argon in ratio of 1:1 with deposition of a coating based on Al₂O₃ with a phase γ-Al₂O₃ with ion assistance using a high-current plasma source with a hollow cathode.

EFFECT: obtaining a coating based on Al₂O₃ with a phase γ-Al₂O₃, which is uniformly distributed on the surface of the cutting tool, wherein there are no visible defects of the coating continuity.

1 cl, 3 dwg, 1 tbl, 1 ex