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A kind of high-strength and high-conductivity graphene-copper composite wire and preparation method thereof

A composite wire and graphene technology, applied in manufacturing tools, heat treatment equipment, furnaces, etc., can solve the problems of reducing the electrical conductivity of materials, reducing the density of materials, and difficult to completely discharge gas, so as to overcome the reduction of electrical conductivity and improve the dispersibility. , to ensure the effect of conductivity

Active Publication Date: 2022-02-22
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, some domestic researchers have done related research on graphene-reinforced copper composite materials, but most of them focus on the preparation of graphene / copper composite powders, which are basically in the experimental stage after being pressed into blocks to test their properties. , and the powder preparation process is complex, it is difficult to achieve large-scale industrial application
Since graphene is prone to agglomeration, most studies have used graphene oxide or trace elements to try to improve the dispersion of graphene by improving the interface, but because graphene oxide and trace elements destroy the microstructure of graphene and copper substrates, will seriously reduce the conductivity of the material
Some studies use continuous extrusion technology to directly prepare composite wire blanks from powder, but it is difficult to completely discharge the gas around the powder during the preparation process, resulting in reduced material density and prone to bulges and barbs on the surface.

Method used

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  • A kind of high-strength and high-conductivity graphene-copper composite wire and preparation method thereof
  • A kind of high-strength and high-conductivity graphene-copper composite wire and preparation method thereof
  • A kind of high-strength and high-conductivity graphene-copper composite wire and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In this embodiment, high-purity graphene (abbreviation: GR) and copper powder are used as raw materials. The number of layers of high-purity graphene is 1-10 layers, and the composition is shown in Table 1 below.

[0051] (1) Powder mixing: use a drum mixer to mix powder, and the powder mixing time is 6 hours;

[0052] (2) Cold isostatic pressing: the composite powder is pressed on a cold isostatic press, the pressing process is: pressure 200MPa, holding time 30 minutes, three-stage pressure relief;

[0053] (3) Vacuum sintering: The vacuum sintering process described is: temperature 900 ° C, heat preservation for 2 hours, vacuum degree ≤ 3 × 10 - 2 Pa;

[0054] (4) hot extrusion: the above vacuum sintered ingot is hot extruded to make a bar, the extrusion temperature is 900 ° C, and the extrusion ratio is 15;

[0055] (5) Continuous extrusion: the hot-extruded bar is continuously extruded, the continuous extrusion machine speed is 8r / min, and the extrusion ratio is 40...

Embodiment 2

[0062] In this embodiment, high-purity graphene and copper powder are used as raw materials, and the ingredients are shown in Table 1 below.

[0063] (1) Powder mixing: use a drum mixer to mix powder, and the powder mixing time is 6 hours;

[0064] (2) Cold isostatic pressing: the composite powder is pressed on a cold isostatic press, the pressing process is: pressure 200MPa, holding time 30 minutes, three-stage pressure relief;

[0065] (3) Vacuum sintering: The vacuum sintering process described is: temperature 900 ° C, heat preservation for 2 hours, vacuum degree ≤ 3 × 10 - 2 Pa;

[0066] (4) hot extrusion: the above vacuum sintered ingot is hot extruded to make a bar, the extrusion temperature is 900 ° C, and the extrusion ratio is 15;

[0067] (5) Continuous extrusion: the hot-extruded bar is continuously extruded, the continuous extrusion machine speed is 8r / min, and the extrusion ratio is 30;

[0068] (6) cold drawing: the above-mentioned wire rod after continuous e...

Embodiment 3

[0074] In this embodiment, high-purity graphene and copper powder are used as raw materials, and the ingredients are shown in Table 1 below.

[0075] (1) Powder mixing: use a drum mixer to mix powder, and the powder mixing time is 6 hours;

[0076] (2) Cold isostatic pressing: the composite powder is pressed on a cold isostatic press, the pressing process is: pressure 200MPa, holding time 30 minutes, three-stage pressure relief;

[0077] (3) Vacuum sintering: The vacuum sintering process described is: temperature 860 ° C, heat preservation for 2 hours, vacuum degree ≤ 3 × 10 - 2 Pa;

[0078] (4) hot extrusion: the above vacuum sintered ingot is hot extruded to make a bar, the extrusion temperature is 900 ° C, and the extrusion ratio is 15;

[0079] (5) Continuous extrusion: the hot-extruded bar is continuously extruded, the continuous extrusion machine speed is 8r / min, and the extrusion ratio is 40;

[0080] (6) cold drawing: the above-mentioned wire rod after continuous e...

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Abstract

The invention discloses a high-strength and high-conductivity graphene-copper composite wire and a preparation method thereof, which belong to the technical field of composite material processing and heat treatment. In the graphene-copper composite wire, the graphene content is 0.05-0.8wt.%, the total content of impurity elements is ≤0.1wt.%, and the balance is copper. The high-strength and high-conductivity graphene-copper composite wire prepared by the present invention has uniform graphene Dispersed and oriented distributed in the copper matrix, its tensile strength reaches 330-480MPa, elongation 6%-20%, electrical conductivity 95-105% IACS, and has excellent comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of composite material processing and heat treatment, and in particular relates to a high-strength and high-conductivity graphene-copper composite wire and a preparation method thereof. Background technique [0002] Dispersion-strengthened copper alloys are a new type of structural and functional materials. Most of the strengthening phase particles are compounds with high melting point, high hardness, and good high-temperature stability. Unlike copper alloys, these particles are immiscible with the copper matrix, and will not dissolve or coarsen at high temperatures, so they can effectively improve the strength of copper alloys and have high softening resistance. However, the strengthening phase tends to have larger particle size, poor electrical conductivity, and poor processing performance, such as Cu-Al 2 o 3 It is difficult to process the dispersion-strengthened copper alloy wire to a diameter of less t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00B22F3/04B22F3/10C22F1/02C22F1/08C21D9/52C22C32/00B21C37/04
CPCC22C9/00B22F3/04B22F3/1007C22F1/02C22F1/08C21D9/525C22C32/0084B21C37/047
Inventor 杨振冯雪解浩峰彭丽军黄国杰张文婧米绪军
Owner GRIMAT ENG INST CO LTD
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