MUMBAI, India, Nov. 21 -- Intellectual Property India has published a patent application (202517097851 A) filed by Kokarev, Vladimir Nikandrovich, Moscow, on Oct. 10, for 'method for producing a composite self-lubricating ceramic coating.'
Inventor(s) include Kokarev, Vladimir Nikandrovich; and Shatrov, Aleksandr Sergeevich.
The application for the patent was published on Nov. 21, under issue no. 47/2025.
According to the abstract released by the Intellectual Property India: "The invention relates to plasma electrolytic oxidation, and more particularly to producing protective ceramic coatings containing dispersed particles of graphite as a solid lubricant on parts made of valve metals and valve metal alloys. The present method includes submerging a part and a counter electrode, as an anode and a cathode, respectively, into a bath containing an aqueous alkaline electrolyte, and supplying bipolar pulses of voltage and current to the electrodes. A graphite counter electrode is used. Oxidation is combined with the formation of an electrolyte suspension resulting from the continuous entry into the electrolyte of dispersed graphite particles having a size of 0.03-2 m, which detach from the graphite counter electrode under the effect of plasma discharges and electrical erosion, the concentration of said particles being maintained at 0.04-0.06 g/l by oxidation with a voltage and current pulse repetition rate of 2-4 kHz under anode voltage pulse amplitudes of 520-1000 V and cathode voltage pulse amplitudes of 200-350 V and under effective current densities of 8-15 ?/dm2 in the anode circuit and 10-20 ?/dm2 in the cathode circuit. The method makes it possible to produce wear and corrosion resistant coatings which have anti-friction and hydrophobic properties."
The patent application was internationally filed on Nov. 10, 2023, under International application No.PCT/RU2023/000341.
Disclaimer: Curated by HT Syndication.
