METHOD FOR APPLICATION OF ELECTROEROSION-RESISTANT COATINGS BASED ON SILVER, COBALT AND COBALT NITRIDES ON COPPER ELECTRICAL CONTACTS

摘要

FIELD: electrical erosion-resistant coatings.;SUBSTANCE: invention relates to the formation of electrical erosion-resistant coatings on copper electrical contacts and can be used in electrical engineering. The method includes an electric explosion of a two-layer composite electrically exploded conductor, one of the layers of which consists of silver foil weighing 60-360 mg, and the second layer is made of cobalt foil equal to 0.5-2.0 mass of the first layer, the formation of pulsed multiphase plasma jet, its melting of the surface of a copper electrical contact at an absorbed power density of 4.5-6.5 GW/m2, deposition of explosion products on the surface and formation of a coating of the Co-Ag system on it, nitriding for 3-5 hours at a temperature of 500-600°C and subsequent pulse-periodic electron-beam treatment of the coating surface at an absorbed energy density of 40-60 J/cm2 , pulse duration 150-200 mcs and the number of pulses 10-30.;EFFECT: invention is aimed at obtaining electrical erosion-resistant coatings with high electrical conductivity, electrical erosion resistance and adhesion to the substrate at the level of cohesion.;1 cl, 3 dwg, 2 ex