▎ 摘　　要

NOVELTY - The preparation of a composite metal material, involves: dispersing graphene oxide in water to obtain a graphene oxide solution, where the ratio of graphene oxide and water is 3-4 g:50 ml; adding nickel sulfate hexahydrate, potassium persulfate, and potassium hydroxide in the graphene oxide solution, stirring, filtration, washing and drying to obtain nickel hydroxide/graphene oxide, where the ratio of potassium sulfate hexahydrate, potassium persulfate, and graphene oxide solution is 4 mole:0.2-0.3 mole:30-40 ml; adding magnesium alloy powder to ethanol solution to obtain a magnesium alloy solution with a concentration of 0.1-0.2 g/ml, adding the nickel hydroxide/graphene oxide, stirring, filtering and drying to obtain magnesium alloy powder, where the mass ratio of magnesium alloy powder to nickel hydroxide/graphene oxide is 100:3-8; and subjecting the composite magnesium alloy powder to heat preservation treatment, and extrusion molding. USE - The method is useful for preparing composite metal material, which is useful in the preparation of a composite metal plate (claimed). ADVANTAGE - In the method, nickel hydroxide is generated to prepare nickel hydroxide/graphene oxide, which effectively improves the dispersibility of graphene oxide, so that graphene oxide forms a relatively uniform dispersion in the magnesium alloy. In the process of heat preservation, nickel hydroxide is converted into nickel oxide, and nickel oxide acts as a "bridge", which enhances the bonding strength of the interface between graphene oxide and magnesium alloy, thus improving the mechanical properties of magnesium alloy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the composite metal material. DESCRIPTION OF DRAWING(S) - The drawing shows the tensile strength of the composite metal materials. (Drawing includes non-English language text).