▎ 摘　　要

NOVELTY - The preparation of layered graphene/titanium composite material, involves (1) evenly dispersing graphene powder into volatile solvent to prepare graphene slurry, (2) evenly coating graphene slurry on surface of sheet-like pure titanium or titanium alloy substrate, and volatilizing solvent to obtain graphene-loaded substrate, (3) cutting graphene-loaded substrate into small sheets, stacking small sheets , and contacting pure titanium surface or titanium alloy surface in small sheet to form layered portion, and (4) directly subjecting layered green portion to spark plasma sintering, heat-treating, and air-cooling or quenching to obtain layered graphene/titanium composite material, alternatively, adding layered green portion to mold for pre-compression molding, performing spark plasma sintering, and heat-treating, and air-cooling or quenching. USE - Preparation of layered graphene/titanium composite material used in aviation, aerospace, automobile and biomedicine application. ADVANTAGE - The method enables uniformly coating volatile slurry containing graphene on one surface of sheet-like pure titanium or titanium alloy substrate, and stacking graphene-coated substrates layer by layer to make sheet-like pure titanium or titanium alloy, and since alloys and graphene coatings are alternately stacked, and spark plasma sintering and heat treatment are performed, layered graphene/titanium composites with excellent strength-plastic matching is obtained. The method enables preparing layered graphene/titanium composite material by simple and feasible process, ensuring low energy consumption, high efficiency, environmentally-friendly effect, and is easy to realize large-scale production. The method maintains the intrinsic structure of graphene intact, and the prepared graphene/titanium composite material enables continuous distribution of graphene in layered direction, which is beneficial to further develop potential for structural and functional integration, and obtains strong plasticity. DETAILED DESCRIPTION - The preparation of layered graphene/titanium composite material, involves (1) evenly dispersing graphene powder into volatile solvent to prepare graphene slurry, (2) evenly coating graphene slurry on one surface of sheet-like pure titanium or titanium alloy substrate until required thickness is reached, and volatilizing solvent to obtain graphene-loaded substrate, (3) cutting graphene-loaded substrate into small sheets of specific shape and size as required, stacking small sheets layer by layer, where graphene surface in one small sheet is adjacent to another, and contacting pure titanium surface or titanium alloy surface in small sheet to form layered portion, and (4) directly subjecting layered green portion to spark plasma sintering, heat-treating at 700-900degreesC for 5-40 minutes, and air-cooling or quenching to obtain layered graphene/titanium composite material, alternatively, adding layered green portion to mold for pre-compression molding, performing spark plasma sintering, and heat-treating at 700-900degreesC for 5-40 minutes, and air-cooling or quenching, where the sintering temperature of spark plasma sintering is controlled at 500-650degreesC, the sintering pressure is controlled at 150-300 MPa, and the heat preservation and pressure holding time is 5-10 minutes.