▎ 摘　　要

NOVELTY - Preparation of graphene-carbon nanotube composite-modified copper-iron alloy involves mixing carbon nanotube-iron nanocomposite with graphene, adding copper powder and iron powder, mixing, milling in a ball mill, adding anhydrous ethanol as a process control agent, milling using stainless steel balls as grinding balls, drying, plasma sintering, obtaining graphene-carbon nanotube composite-modified copper-iron alloy material, adding anode copper, melting in vacuum, obtaining alloy ingot, hot forging, hot rolling and cooling the resultant product to room temperature. USE - Preparation of graphene-carbon nanotube composite-modified copper-iron alloy (claimed). ADVANTAGE - The method enables efficient preparation of graphene-carbon nanotube composite-modified copper-iron alloy having excellent mechanical property, and improved Rockwell hardness and thermal conductivity as compared with the pure copper and iron alloy. The graphene-carbon nanotube composite is uniformly dispersed in the copper-iron alloy, thus the copper-iron alloy has high density. DETAILED DESCRIPTION - Preparation of graphene-carbon nanotube composite-modified copper-iron alloy involves dissolving soluble iron salt, citric acid and hypophosphorous acid in molar ratio of 5:1:3, in deionized water, adding ethanol as a carbon source and catalyst rare-earth oxide, stirring uniformly, performing hydrothermal reaction in a reactor at 165-185 degrees C for 2 hours, heat-treating the resultant product at 600 degrees C for 1 hour under argon protection atmosphere, obtaining carbon nanotube-iron nanocomposite, mixing 10-20 pts. wt. carbon nanotube-iron nanocomposite with 10-20 pts. wt. graphene, adding 200-400 pts. wt. copper powder and 10-20 pts. wt. iron powder, mixing, milling in a ball mill, adding anhydrous ethanol as a process control agent, then vacuuming the ball mill to 0.1 Pa, milling using stainless steel balls as grinding balls at 80 rpm for 6-8 hours, drying the resultant mixture in a vacuum oven, performing discharge plasma sintering, obtaining graphene-carbon nanotube composite-modified copper-iron alloy material, adding anode copper, melting in vacuum, obtaining alloy ingot, hot forging, hot rolling and cooling the resultant product to room temperature. The graphene is prepared by intercalation-expansion-stripping method, and has 5 or less graphene layers.