▎ 摘　　要

NOVELTY - The preparation method of graphene-reinforced aluminum-based composite material involves adding multilayer graphene microchip and aluminum metal powder into a ball milling tank, ball-milling, and cold pressing to obtain multilayered graphene microchip/aluminum preform, placing the preform and pure aluminum block into a vacuum gas pressure infiltration furnace, sealing the furnace, vacuumizing, heating, preheating the preform, adding industrial pure aluminum block, and heating to obtain molten aluminum metal, and immersing the preheated preform into molten aluminum metal. USE - Preparation method of graphene-reinforced aluminum-based composite material (claimed). ADVANTAGE - The method enables preparation of graphene-reinforced aluminum-based composite material with excellent overall performance, by simple and economical process. DETAILED DESCRIPTION - The preparation method of graphene-reinforced aluminum-based composite material involves (1) weighing 0.5-4 %mass multilayer graphene microchip, 96-99.5 %mass aluminum metal powder, industrial pure aluminum block, where the weight ratio of industrial pure aluminum block and aluminum metal powder is (3-10):1, (2) adding multilayer graphene microchip and aluminum metal powder into a ball milling tank, ball-milling at speed of 100-400 rpm for 4-15 hours, adding the ball-milled powder into a cold pressing mold, and cold pressing to obtain multilayered graphene microchip/aluminum preform, (3) placing the multilayered graphene microchip/aluminum preform obtained in the step (2) and the pure aluminum block weighed in the step (1) into a vacuum gas pressure infiltration furnace, where the pure aluminum block is placed into a bottom of a furnace cavity of the vacuum gas pressure infiltration furnace and the multilayered graphene microchip/aluminum preform in an upper portion of the furnace cavity, sealing the vacuum gas pressure infiltration furnace, vacuumizing until the vacuum degree is less than 10-4 MPa, heating the vacuum gas pressure infiltration furnace, preheating the multilayered graphene microchip/aluminum preform at 400-660 degrees C under vacuum condition, adding the industrial pure aluminum block, heating at 760-950 degrees C, maintaining the temperature for 0.5-2 hours to obtain molten aluminum metal, immersing the preheated multilayered graphene microchip/aluminum preform into molten aluminum metal, stopping heating, and filling protective gas in the vacuum gas pressure infiltration furnace, and naturally cooling the vacuum gas pressure infiltration furnace to room temperature to obtain high compact multi-layer graphene microchip reinforced aluminum-based composite material cast ingot, (4) plastic-deforming the obtained multilayer graphene microchip reinforced aluminum-based composite material cast ingot to obtain low-layer graphene reinforced aluminum-based composite material, and (5) homogenizing the low-layer graphene reinforced aluminum-based composite material at 500-550 degrees C for 2-4 hours.