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Graphene/aluminum composite material

An aluminum composite material and composite material technology, applied in the field of graphene/aluminum composite material and its preparation, can solve the problems of deteriorating material performance and achieve the effects of improving dispersion uniformity, low preparation cost, and adjustable and controllable process

Inactive Publication Date: 2015-12-02
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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AI Technical Summary

Problems solved by technology

However, if graphene is directly added to molten aluminum without any treatment, serious defects (pores, graphene agglomeration, etc.) will be observed in the final ingot, deteriorating material properties.

Method used

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  • Graphene/aluminum composite material
  • Graphene/aluminum composite material

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Experimental program
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Embodiment 1

[0039] Get 999 grams of commercially pure Al atomized powder (nitrogen atomization, purity ≥ 99%), and 1 g of graphene (prepared by Hummer's method). The specific preparation process is as follows:

[0040] (1) The pure Al atomized powder with a particle size of 30 μm and the added amount of graphene added is 0.1wt.% of the total amount of the graphene / aluminum composite in a "V" type powder mixer with a speed of 10r / min Mix for 24 hours;

[0041] (2) Put the mixed powder into a VC high-efficiency mixer with a rotating speed of 100r / min and mix for 10min;

[0042] (3) Put the mixed powder, high-carbon chromium bearing steel balls and stearic acid in a stirring ball mill at the same time, fill with liquid nitrogen, and start ball milling when all the balls are submerged in liquid nitrogen. The ball-to-material ratio is 30:1;

[0043] (4) After 2 hours of low-temperature ball milling, take out the powder and place it in an inert gas protection box. After the temperature return...

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Abstract

The invention provides a graphene / aluminum composite material. The addition amount of graphene in the composite material accounts for 0.1-5.0 wt% of the total amount of the composite material. Compared with the mechanical properties and the electric performance of a material to which no graphene is added, the mechanical properties and the electric performance of the graphene / aluminum composite material are improved to different extents. Due to appearance of graphene / aluminum intermediate alloy, the graphene can be added to melted aluminum liquid in a graphene / aluminum intermediate alloy mode, dispersion uniformity of the graphene in the aluminum liquid is improved to the largest extent, and accordingly industrial volume production of graphene modified aluminum wire cables can be achieved through the melting casting method. A preparation method of the composite material includes the steps of mechanical mixing, low-temperature ball milling, vacuum degassing, hot isostatic pressing, extrusion and the like. The technology is simple and controllable, production cost is low, the preparation method is suitable for industrial production, and market prospects are good.

Description

technical field [0001] The invention relates to a composite material, in particular to a graphene / aluminum composite material and a preparation method thereof. Background technique [0002] Due to the large span suspended in the air, the overhead high-voltage transmission line not only has certain requirements for the conductivity of the conductor and cable, but also has certain requirements for the strength of the conductor and cable. At present, the commonly used overhead high-voltage transmission wires at home and abroad include copper wires and aluminum wires. Compared with aluminum wires, copper wires have better conductivity and higher strength. However, the cost of copper conductors is high, and copper is a strategic resource, while aluminum resources are abundant, widely distributed, and low in cost. Although almost 90% of the transmission lines in some places use aluminum composite conductors, the application of aluminum composite conductors in some places is less...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10C22C21/00B22F1/00
Inventor 李炯利王旭东何维维戴圣龙张晓艳
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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