Preparation process of an aluminum-based graphene composite wear-resistant self-lubricating material

Abstract

The invention discloses a preparation process of an aluminum-based graphene composite wear-resistant self-lubricating material. The preparation process steps are: S1: using a chemical expansion method to prepare flake graphite into a graphene oxide suspension; S2: adding the graphene oxide suspension to a suspension containing Soluble salt of copper to form a layered composite structure of graphene oxide and Cu2+, adding a strong reducing agent to the aqueous solution to reduce the middle functional groups and Cu2+ of graphene oxide into a mixture of graphene and simple copper; S3: the mixture of step S2 The mixture is static and filtered; dried in a vacuum heating furnace drying chamber, weighed and sealed for packaging; S4: after the aluminum alloy is melted, the composite of graphene and metal copper is forced to be placed in the aluminum alloy melt to heat up to a temperature higher than Melting point 120-150°C, keep warm for 20-50 minutes; S5: Cast the uniformly mixed aluminum and graphene liquid melt into various parts; copper plating on the surface of graphene not only prevents the aggregation of graphene layered structure, but also increases the concentration of graphene and graphene Wettability of aluminum alloys. Copper and aluminum alloys can be melted in any proportion.

Description

technical field [0001] The invention relates to a preparation method of an aluminum-based composite material, in particular to a preparation process of an aluminum-based graphene composite wear-resistant self-lubricating material. Background technique [0002] Aluminum matrix composites have high specific strength and specific stiffness, good high temperature performance and wear resistance, and low thermal expansion coefficient. Graphene is a new type of two-dimensional nanomaterial, its strength is as high as 1.01TPa, 100 times that of structural steel, but its density is 1 / 5 of that of structural steel, and it is an excellent reinforced composite material. Reinforcing aluminum alloys with graphene is an important breakthrough to further improve aluminum matrix composites. However, the preparation of graphene is expensive at present, and the direct use of graphene as a composite material has high production costs and low economic value. [0003] In addition, the existing...

AI Technical Summary

Problems solved by technology

It not only solves the problem of non-wetting of graphene and aluminum alloy melt in liquid state, but also achieves microscopic uniform mixing of graphene and aluminum alloy melt, greatly improving the performance of composite materials, with higher hardness, strength and self-lubricating properties