FIELD: electrical contacts coatings.
SUBSTANCE: invention relates to the formation of coatings on copper electrical contacts, which can be used in electrical engineering as electrical erosion-resistant coatings. The method includes an electric explosion of a three-layer composite electrically exploded conductor, one of the layers of which consists of silver foil weighing 60-360 mg, the second layer is made of molybdenum foil equal to 0.5-2.0 mass of the first layer, and the third layer is made of carbon-graphite fiber equal to 0.5-1.0 of the mass of the first layer, formation of a pulsed multiphase plasma jet from explosion products, melting of the surface of a copper electrical contact with it 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 Mo-C-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 10-30 pulses.
EFFECT: invention is aimed at obtaining coatings with high electrical conductivity, electrical erosion resistance and adhesion to the substrate at the level of cohesion.
1 cl, 2 ex, 3 dwg
