Method for preparing graphene reinforced aluminum-based composite material through metal 3D printing

Abstract

The invention relates to the field of metal printing, and particularly provides a method for preparing a graphene reinforced aluminum-based composite material through metal 3D printing. The method comprises the following steps: (1) carrying out vacuum ball milling on graphene powder, graphite powder, PVA (polyvinyl alcohol) and a solvent to prepare a graphene dispersion liquid; (2) carrying out vacuum ball milling on the graphene dispersion liquid and an aluminum-based powder material, drying and filtering to prepare a graphene modified aluminum-based powder material; and (3) the graphene modified powder is taken, and the graphene reinforced aluminum matrix composite is prepared through a 3D printing method. By the adoption of the metal 3D printing method, the problems that due to traditional pressure casting, graphene is prone to agglomeration and uneven in dispersion, and brittle substances such as Al4C3 can be generated in the long-time sintering process of powder metallurgy can be solved, the research and development and production cycle of the graphene reinforced aluminum-based material is effectively shortened, and the metal 3D printing method has high application value.

Description

technical field [0001] The invention belongs to the field of metal 3D printing, and particularly relates to a method for preparing a graphene-reinforced aluminum-based composite material by metal 3D printing. Background technique [0002] Aluminum-based materials have a series of excellent characteristics such as light density, good elasticity, high specific stiffness and specific strength, good impact resistance, good electrical and thermal conductivity, good forming performance and high recycling and recyclability, and are considered as "Chaoyang materials". ", has been widely used in transportation, aerospace, mineral processing and other fields. However, aluminum-based materials also have problems such as low hardness and poor wear resistance, which limit the application of aluminum-based materials to a large extent and become the bottleneck of research and development in the field of aluminum-based materials. [0003] Graphene is a carbon atom with sp 2 The hybrid orb...

AI Technical Summary

Problems solved by technology

[0005] The traditional preparation methods of graphene-reinforced aluminum matrix composites usually include pressure casting and powder metallurgy. The speed is filled into the cavity of the die-casting mold, and the metal or alloy is solidified under pressure to form a casting method; powder metallurgy is to prepare metal powder or use metal powder (or a mixture of metal powder and non-metal powder) as raw material , through forming and sintering, the industrial technology of producing metal materials, composite materials and various types of products; these technical means mostly use external methods, and the process is complicated and the cost is high

And there are the following problems such as: the pressure of this type of processing method is relatively high, which will cause graphene to be easily coarsened and agglomerated during the preparation process, making it difficult to disperse evenly in the aluminum matrix, resulting in defects inside the material and poor mechanical properties of the material; In addition, the aluminum matrix composite is prepared by the external addition method, and the temperature is high during the processing, which will generate Al 4 C 3 Brittle objects affect performance, etc.