Graphene-reinforced alloy composite material and preparation method thereof

A method for preparing a graphene-reinforced alloy composite material, comprising:

• (1) preparing a porous graphene colloid by using an aqueous graphene oxide solution as a raw material, smelting a first-part alloy into an alloy melt I, pouring the alloy melt I into the porous graphene colloid to obtain a formed product, subjecting the formed product to a hot extrusion, and pulverizing into a powder I;
• smelting a second-part alloy into an alloy melt II, adding a high-purity silicon powder to the alloy melt II, mixing to be uniform by stirring, and atomizing by using a restricted annular-gap nozzle, to obtain a powder II;
• mixing the powder I and the powder II to be uniform, to obtain a pretreated alloy powder;
• (2) placing the pretreated alloy powder in a high-purity ark, transferring the high-purity ark to a high-temperature tubular furnace, subjecting the pretreated alloy powder to a redox treatment, and introducing methane and hydrogen to grow graphene, to obtain a coated alloy powder;
• and
• (3) subjecting the coated alloy powder to a pre-compressing molding, and sintering, to obtain the graphene-reinforced alloy composite material.