▎ 摘　　要

NOVELTY - Preparation of graphene-enhanced carbon-copper composite material involves (1) preparing graphene by high-voltage discharge of carbon source powder, cooling, taking out the reactant and repeatedly washing, filtering and drying to obtain graphene powder, (2) performing surface activation treatment of the graphene powder in an inert gas atmosphere, heating, dissolving tetranitrogen tetrasulfide solid in carbon disulfide liquid, heating and gasifying and passing into graphene powder to keep it warm, passing in inert gas again to exhaust the gas in the graphene powder, cooling to room temperature, (3) adding the compound obtained in step (2) to ethanol solution, ultrasonically processing, obtaining dispersion, adding copper powder and niobium powder to the dispersion, ball milling the dispersion to obtain a mixed liquid, heating to 80-85 degrees C and stirring, drying until the mixed liquid is semi-dry, obtaining copper-niobium-graphene mixed powder, sintering and cooling. USE - Preparation of graphene-enhanced carbon-copper composite material. ADVANTAGE - The method improves mechanical properties of the graphene copper base, and is economical and easy to operate. DETAILED DESCRIPTION - Preparation of graphene-enhanced carbon-copper composite material involves (1) preparing graphene by high-voltage discharge of carbon source powder, cooling, taking out the reactant and repeatedly washing, filtering and drying to obtain graphene powder, (2) performing surface activation treatment of the graphene powder in an inert gas atmosphere, heating, dissolving tetranitrogen tetrasulfide solid in carbon disulfide liquid, heating and gasifying and passing into graphene powder to keep it warm, passing in inert gas again to exhaust the gas in the graphene powder, cooling to room temperature, (3) adding the compound obtained in step (2) to ethanol solution, ultrasonically processing, obtaining dispersion, adding copper powder and niobium powder to the dispersion, ball milling the dispersion to obtain a mixed liquid, heating to 80-85 degrees C and stirring, drying until the mixed liquid is semi-dry, obtaining copper-niobium-graphene mixed powder, (4) sintering the copper-niobium-graphene mixed powder obtained in step (3) at 700-750 degrees C for 5-7 minutes and cooling by spark plasma under vacuum. The amount of tetranitrogen tetrasulfide in the carbon disulfide liquid is 3-5 vol.%.