THIN-LAYER CERAMIC COATING, METHOD OF MAKING SAME, FRICTION SURFACE BASED ON THIN-LAYER CERAMIC COATING AND METHOD OF MAKING SAME Russian patent published in 2012 - IPC C25D11/12 F16C33/12 

FIELD: metallurgy.

SUBSTANCE: thin-layer ceramic coating with the friction surface, formed with the ability to absorb grease with fibrous crystals alpha-Al₂O₃, characterised by the ability to layering with formation of longitudinal cracks with transverse size of ~ 1 nm and more due to longitudinal defects in the crystal lattice. A method of producing coating with the friction surface involves microarc oxidation of a part in the anode-cathode mode at a ratio of values of Ic/Ia = 1.0 - 1.15 for 90 -240 minutes consecutively in two electrolytes, and microarc oxidation in the second electrolyte is carried out with periodic pulsations of the anodic and cathodic current by 30% - 50% of the DC current mode for formation of longitudinal crystal lattice defects of fibrous crystals alpha-Al₂O₃.

EFFECT: increased bearing capacity of the thin-layer ceramic coating and the friction surface made on its base, by increasing damping of the mechanical effects on the surface in the pairs of friction formed on its basis.

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