▎ 摘　　要

NOVELTY - Preparation of graphene reinforced aluminum composite material involves mixing graphene and aluminum metal powder, ball milling into mixed powder, dispersing mixed powder in ethanol aqueous solution, adding dispersant, stirring, filtering and drying to obtain graphene-aluminum mixed powder, adding graphene-aluminum mixed powder into mold, cold pressing to obtain graphene/aluminum preform, heating aluminum alloy block to obtain molten aluminum metal, immersing preheated graphene/aluminum preform in molten aluminum metal, stop heating, introducing mixture of nitrogen and oxygen into furnace, naturally cooling to room temperature, stop introducing the mixed gas to obtain high-density alumina-aluminum nitride-graphene reinforced aluminum-based composite ingot, subjecting composite ingot to large plastic deformation treatment to obtain alumina-aluminum nitride-graphene reinforced aluminum matrix composite material and subjecting to composition homogenization treatment. USE - Preparation of graphene reinforced aluminum composite material. ADVANTAGE - The preparation method effectively solves the problem of a large number of brittle phases in the graphene reinforced aluminum matrix composite material prepared by existing method. DETAILED DESCRIPTION - Preparation of graphene reinforced aluminum composite material involves mixing 0.3-4 %mass graphene and remaining amount aluminum metal powder, ball milling into mixed powder, dispersing mixed powder in ethanol aqueous solution, adding dispersant, stirring, filtering and drying to obtain graphene-aluminum mixed powder, adding graphene-aluminum mixed powder into mold, cold pressing to obtain graphene/aluminum preform, placing aluminum alloy block in graphite mold at bottom of the cavity of the vacuum infiltration furnace, and placing the graphene/aluminum preform on the upper portion of the furnace cavity of the vacuum infiltration furnace, sealing the vacuum infiltration furnace, heating graphene/aluminum preform to 560-650 degrees C at rate of 3-10 degrees C for 0.5-3 hours, heating aluminum alloy block to 780-850 degrees C for 0.5-3 hours to obtain molten aluminum metal, immersing preheated graphene/aluminum preform in molten aluminum metal, stop heating, introducing mixture of nitrogen and oxygen into the vacuum infiltration furnace which is driven by air pressure to diffuse to graphene-aluminum interface and oxidizes with aluminum to generate aluminum oxide and aluminum nitride in situ at the graphene-aluminum interface, naturally cooling to room temperature, stop introducing the mixed gas to obtain high-density alumina-aluminum nitride-graphene reinforced aluminum-based composite ingot, subjecting composite ingot to large plastic deformation treatment to obtain alumina-aluminum nitride-graphene reinforced aluminum matrix composite material and subjecting to composition homogenization treatment. The weight ratio of aluminum alloy block and aluminum metal powder is 3-10:1.