▎ 摘　　要

NOVELTY - Vacuum brazing dispersed copper involves cleaning surface of dispersed copper workpiece, drying, blasting using graphene composite particles, placing dispersed copper workpiece in rare gas atmosphere, raising temperature to 680-950 degrees C, spraying surface using compressed modification liquid, irradiating, melting graphene composite particles on surface, cooling to obtain dispersed copper workpiece with modified layer, putting dispersed copper workpiece into electrolysis cell connected to cathode of electroplating power supply, putting platinum electrode and anode of electroplating power supply into electrolytic cell, maintaining bath at temperature of 45-55 degrees C and pH of 4.2-4.9, plating for 3-4 minutes, rinsing with ionized water, drying to cover surface with metal film, putting disperse copper workpiece after coating, Kovar (RTM: nickel cobalt ferrous alloy) workpiece and surface cleaned brazing material into vacuum brazing furnace, and vacuum brazing. USE - Vacuum brazing of dispersed copper. ADVANTAGE - The method effectively improves the surface bonding force of the copper or nickel film and the dispersed copper and the brazing welding effect with Kovar (RTM: nickel cobalt ferrous alloy), eliminates the residual stress between the metal joints, and enhances the mechanical properties of the brazing joint. DETAILED DESCRIPTION - Vacuum brazing dispersed copper involves cleaning surface of dispersed copper workpiece to remove oxide film and oil stain on surface, drying, blasting surface of dispersed copper using graphene composite particles at 0.2-0.5 MPa for 40-55 seconds, where nozzle is 3-5 cm away from dispersed copper workpiece, placing dispersed copper workpiece in rare gas atmosphere, raising temperature to 680-950 degrees C, spraying surface using compressed modification liquid, irradiating with laser irradiation, melting graphene composite particles on surface, naturally cooling to room temperature to obtain dispersed copper workpiece with modified layer thickness of 0.2-0.4 mm, putting dispersed copper workpiece into electrolysis cell connected to cathode of electroplating power supply, putting platinum electrode and anode of electroplating power supply into electrolytic cell, maintaining bath at temperature of 45-55 degrees C, pH of 4.2-4.9 and current density of 40-50 mA/cm2, plating for 3-4 minutes, rinsing with ionized water, drying to cover surface with metal film, putting disperse copper workpiece after coating, Kovar (RTM: nickel cobalt ferrous alloy) workpiece and surface cleaned brazing material into vacuum brazing furnace, and vacuum brazing.