CPC C23C 18/31 (2013.01) [C23C 18/1639 (2013.01); C23C 18/1691 (2013.01); C23C 18/1692 (2013.01)] | 9 Claims |
1. A preparation method of a graphene reinforced aluminum matrix composite, comprising:
preparation of raw materials, comprising: drying graphene, aluminum powder and aluminum block in a drying oven to remove moisture;
obtaining aluminum coated graphene powder by plating the aluminum powder on a surface of the graphene through electroless plating;
melting the aluminum block into aluminum liquid in a crucible furnace and injecting first inert gas for protection;
heating a forming device to a temperature lower than a melting point of aluminum;
alternately pouring the aluminum liquid into a forming mold of the forming device to form an aluminum liquid solidification layer and laying a layer of the aluminum coated graphene powder on the aluminum liquid solidification layer to form an aluminum coated graphene powder layer until the forming mold is fully filled, thereby forming a sandwich structure with a first layer and a last layer both being the aluminum liquid solidification layers;
extruding the sandwich structure into a rectangular test block by using a press;
heating the rectangular test block to a temperature in a range of 500° C. to 600° C. in a heating furnace, keeping the heated rectangular test block in the heating furnace to maintain the temperature for a preset time, and performing forging treatment on the rectangular test block to obtain a forged rectangular test block;
after cooling the forged rectangular test block to room temperature, performing longitudinal cold deformation on the forged rectangular test block to obtain a deformed rectangular test block; and
performing annealing treatment on the deformed rectangular test block under a protection of second inert gas to obtain the graphene reinforced aluminum matrix composite.
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