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High-strength and high-conductivity graphene copper-based composite material and preparation method thereof

A technology of copper-based composite materials and graphene, which is applied in the field of high-strength and high-conductivity composite materials and their preparation, can solve the problem of large-scale preparation of graphene/metal-based composite materials, which cannot meet the requirements of practical applications, and poor comprehensive performance of composite materials And other problems, to achieve the effect of high hardness, high hardness and wear resistance, excellent electrical conductivity

Inactive Publication Date: 2014-07-30
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still few international reports on graphene metal matrix composites, and only a few people use graphene and metals to prepare composite materials and study their applications in fuel cells.
Researchers from a few domestic universities such as Harbin Institute of Technology and Shandong University have carried out research on graphene-reinforced copper-based composite materials, and have made some research progress. However, research in this area is still in the experimental stage, and it is difficult to prepare graphene / copper matrix on a large scale. Metal matrix composites; and if the ordinary sintering method is adopted, the wettability of graphene and the metal matrix in the molten state is very poor, and the comprehensive performance of the prepared composite material is poor, which cannot meet the requirements of practical applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Graphene copper-based composite material: Graphene 0.1wt.%, the balance is copper.

[0021] The specific preparation steps are:

[0022] 1. Add 0.04g of graphene with a thickness of 0.1~5nm and a diameter of 10nm~20um to 100ml of copper sulfate solution with a concentration of 0.4g / ml, and ultrasonic dispersion for 0.5 hours;

[0023] 3. Add 60ml of 80% hydrazine hydrate solution to the above solution to reduce nano copper powder and graphene;

[0024] 4. Magnetically stir the reduced nano-copper powder and graphene, and then place it in a drying oven at 200°C for 12 hours after being evaporated to dryness;

[0025] 5. Place the dried composite powder in H 2 Under the atmosphere, reduce at 200°C for 2 hours, and then press the composite powder into a block;

[0026] 6. Perform spark plasma sintering (SPS) on the compressed sample to prepare graphene copper-based composite material. The SPS sintering process is: the cavity vacuum is 0.1Pa, the applied pressure is 40MPa, the heatin...

Embodiment 2

[0029] Graphene copper-based composite material: Graphene 1.0wt.%, the balance is copper.

[0030] The specific preparation steps are:

[0031] 1. Add 0.404g of graphene with a thickness of 0.1~5nm and a diameter of 10nm~20um to 100ml of copper sulfate solution with a concentration of 0.4g / ml, and ultrasonic dispersion for 0.5 hours;

[0032] 3. Add 60ml of 80% hydrazine hydrate solution to the above solution to reduce nano copper powder and graphene;

[0033] 4. Magnetically stir the reduced nano-copper powder and graphene, and then place it in a drying oven at 200°C for 12 hours after being evaporated to dryness;

[0034] 5. Place the dried composite powder in H 2 Under the atmosphere, reduce at 200°C for 2 hours, and then press the composite powder into a block;

[0035] 6. Perform spark plasma sintering (SPS) on the compressed sample to prepare graphene copper-based composite material. The SPS sintering process is: the cavity vacuum is 0.1Pa, the applied pressure is 40MPa, the heati...

Embodiment 3

[0038] Graphene copper-based composite material: Graphene 2.0wt.l%, the balance is copper.

[0039] The specific preparation steps are:

[0040] 1. Add 0.816g of graphene with a thickness of 0.1~5nm and a diameter of 10nm~20um to 100ml of copper sulfate solution with a concentration of 0.4g / ml, and ultrasonic dispersion for 0.5 hours;

[0041] 3. Add 60ml of 80% hydrazine hydrate solution to the above solution to reduce nano copper powder and graphene;

[0042] 4. Magnetically stir the reduced nano-copper powder and graphene, and then place it in a drying oven at 200°C for 12 hours after being evaporated to dryness;

[0043] 5. Place the dried composite powder in H 2 Under the atmosphere, reduce at 200°C for 2 hours, and then press the composite powder into a block;

[0044] 6. Perform spark plasma sintering (SPS) on the compressed sample to prepare graphene copper-based composite material. The SPS sintering process is: the cavity vacuum is 0.1Pa, the applied pressure is 40MPa, the heat...

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Abstract

The invention discloses a high-strength and high-conductivity graphene copper-based composite material and a preparation method thereof, wherein the graphene copper-based composite material comprises 0.01wt.%-6.0wt% of graphene and the balance of copper; the preparation method comprises the following steps: firstly, adding graphene oxide to a copper sulfate solution, adding a hydrazine hydrate solution to reduce nano-copper powder and graphene, drying and then reducing in H2 atmosphere, and finally, preparing the graphene copper-based composite material from the reduced composite powder by use of the Spark Plasma Sintering (SPS) technology. The graphene copper-based composite material shows excellent electric conductivity and thermal conductivity and outstanding wear resistance and corrosion resistance, and thus has a wide application prospect in the field of the frame leads and the electrical contact materials.

Description

technical field [0001] The invention belongs to the technical field of preparation of new nonferrous metal materials, and in particular relates to a high-strength and high-conductivity composite material and a preparation method thereof. Background technique [0002] In recent years, the rapid development of machinery, electronics, rail transit, etc. has increasingly strong demand for composite materials with high strength and high conductivity in a wide temperature range. It is difficult to meet the actual needs of simple materials, and the development of materials in the direction of compounding has become an inevitable trend. Due to its unique structure and excellent physical and chemical properties, graphene has a wide range of applications in polymer matrix composite materials, energy storage materials, optoelectronic devices, biomedicine and other fields, and has attracted great attention from domestic and foreign scientific research circles. . [0003] At present, t...

Claims

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Application Information

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IPC IPC(8): C22C9/00C22C1/05C22C1/10
Inventor 李勇张建波许方武淑珍郑碰菊刘耀
Owner JIANGXI UNIV OF SCI & TECH
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