▎ 摘　　要

NOVELTY - Preparing a titanium-graphene composite material with strong plasticity matching involves dispersing graphene oxide in a mixed solvent of deionized water and alcohol. The deionized water and alcohol are mixed according to a volume ratio of 3:2, and ultrasonically stirred and dispersed to form a uniform graphene oxide dispersion. The ratio of graphene oxide to mixed solvent is 0.2-2g/L. The 5-30g of eutectoid metal salt is dispersed in 100ml of deionized water, stir and disperse until there is no suspended matter in the solution to form a metal ion salt solution. The graphene oxide dispersion is added dropwise to the metal ion salt solution, ultrasonic stirring, while stirring, add 1-5mL glacial acetic acid dropwise to achieve uniform dispersion. After stirring for at least 2h, 0.2mol/L sodium hydroxide solution is added to the mixture to adjust the pH to above 10. USE - Method for preparing a titanium-graphene composite material with strong plasticity matching. ADVANTAGE - The method enables to prepare a titanium-graphene composite material with strong plasticity matching, which uses the eutectoid element in the titanium alloy to modify the graphene to form metal nano-layer particles, load transfer strengthening effect of graphene is enhanced, and the plasticity of the graphene-reinforced titanium-based composite material is improved. DETAILED DESCRIPTION - Preparing a titanium-graphene composite material with strong plasticity matching involves dispersing graphene oxide in a mixed solvent of deionized water and alcohol. The deionized water and alcohol are mixed according to a volume ratio of 3:2, and ultrasonically stirred and dispersed to form a uniform graphene oxide dispersion. The ratio of graphene oxide to mixed solvent is 0.2-2g/L. The 5-30g of eutectoid metal salt is dispersed in 100ml of deionized water, stir and disperse until there is no suspended matter in the solution to form a metal ion salt solution. The graphene oxide dispersion is added dropwise to the metal ion salt solution, ultrasonic stirring, while stirring, add 1-5mL glacial acetic acid dropwise to achieve uniform dispersion. After stirring for at least 2h, 0.2mol/L sodium hydroxide solution is added to the mixture to adjust the pH to above 10. 30ml of ascorbic acid with a concentration of 0.56mol/L is added and stirred until the solution is uniform. The mixture is put into a water bath at 90 degrees C and heated for at least 3h, use deionized water to centrifuge and wash more than 5 times until the pH of the solution is neutral. The centrifuged muddy mixture is put into a petri dish and freeze-dry to obtain the eutectoid metal element modified graphene nanopowder M@rGO. The eutectoid metal element modified graphene nanopowder M@rGO is ultrasonically dispersed in a mixed solvent of alcohol and deionized water. The alcohol and deionized water are mixed according to a volume ratio of 4:1. M@rGO dispersion is formed after ultrasonic dispersion. The titanium alloy powder is added to the M@rGO dispersion, stirred and dispersed uniformly in a water bath at 80 degrees C to obtain M@rGO/Ti powder slurry, and add glacial acetic acid dropwise while stirring to achieve uniform dispersion of M@rGO on the surface of the titanium powder. The M@rGO/Ti powder slurry is put into a molybdenum alloy high-pressure mold, adopt rapid plasma discharge sintering method for pressure sintering to obtain titanium-graphene composite material blank. The billet is rolled or extruded at a high temperature to obtain a titanium-graphene plate or bar.