▎ 摘　　要

NOVELTY - Preparing high strength and high conductivity graphene reinforced copper matrix composite material comprises mixing graphene with absolute ethanol, carrying out high-speed shear dispersion treatment and ultrasonically vibration treatment to obtain monodisperse of graphene, mixing graphene monodispersant with copper powder, carrying out ball milling pre-dispersion to obtain a mixture of graphene/copper composite powder and ethanol, taking the obtained mixture of the graphene/copper composite powder and ethanol, heating, drying to obtain graphene copper composite, coating the obtained graphene copper composite to obtain a graphene copper composite, taking the obtained hydrogen reduction treatment of the graphene copper composite of the core-shell structure, to obtain graphene copper powder, subjecting the graphene copper powder obtained for cold isostatic pressing to obtain a cold pressed billet, welding and sealing, subjecting to hot isostatic pressing treatment, hot extrusion molding. USE - The high strength and high conductivity graphene reinforced copper matrix composite material is useful for automobile, aerospace and electronic field (claimed). ADVANTAGE - The material has high bonding with substrate interface and stable performance. DETAILED DESCRIPTION - Preparing high strength and high conductivity graphene reinforced copper matrix composite material comprises (a) mixing graphene with absolute ethanol, carrying out high-speed shear dispersion treatment and ultrasonically vibration treatment to obtain monodisperse of graphene, evenly mixing the graphene monodispersant with the copper powder, carrying out ball milling pre-dispersion to obtain a mixture of graphene/copper composite powder and ethanol, (b) under stirring conditions, taking the obtained mixture of the graphene/copper composite powder and the ethanol, heating to a viscous liquid bath, drying to obtain graphene copper composite, (c) coating the obtained graphene copper composite to obtain a graphene copper composite having a core-shell structure, (d) taking the obtained hydrogen reduction treatment of the graphene copper composite of the core-shell structure, reducing the oxygen contained in the composite to obtain graphene copper powder, (e) subjecting the graphene copper powder obtained for cold isostatic pressing to obtain a cold pressed billet, (f) after the cold-pressed ingot obtained, welding, under heating conditions, vacuuming the jacket, when the degree of vacuum is less than 1x 10-3Pa, welding and sealing, (g) welding and sealing the jacket, subjecting to hot isostatic pressing treatment to obtain a graphene-reinforced copper matrix composite material, and (h) hot extrusion molding of graphene-reinforced copper matrix composite material to obtain high-strength, high-conductivity graphene-reinforced copper-based composite material. An INDEPENDENT CLAIM is also included for high strength and high conductivity graphene reinforced copper matrix composite material is obtained by above method.