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Plastic processing preparation method of high-strength and high-conductivity graphene-reinforced copper-based composites

A copper-based composite material and plastic processing technology, which is applied in the field of plastic processing and preparation of high-strength and high-conductivity graphene-reinforced copper-based composite materials, can solve the problem that it is difficult to effectively ensure the structural integrity of graphene sheets and that copper-based composite materials cannot obtain high strength. High conductivity, inability to give full play to graphene and other problems, to achieve the effects of process controllability and product performance stability, easy interface bonding and low cost

Active Publication Date: 2021-03-02
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reason is that, firstly, graphene is difficult to disperse in composite materials and is easy to agglomerate; secondly, the interfacial bonding between graphene and copper is poor; the last point is that the existing preparation methods are difficult to effectively ensure the integrity of the graphene sheet structure, and cannot fully Make use of the characteristics of graphene
Therefore, the prepared copper-based composites cannot obtain the performance of both high strength and high conductivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The plastic processing preparation method of the high-strength and high-conductivity graphene-reinforced copper-based composite material provided by the invention comprises the following steps:

[0029] 1. Preparation of composite powder: put electrolytic copper powder with a mass percentage of 95% to 99% and graphene with a mass percentage of 1% to 5% into a V-shaped mixer, add a mixture of absolute ethanol and acetone The finished process control agent is put into the steel balls for uniform mixing. Preferably, the ball-to-material ratio of the steel balls to the materials in the V-type mixer is 10:1-50:1, and the 90-120r / min The rotation speed is mechanically mixed with a V-shaped mixer for 60-120 hours to obtain a uniformly mixed composite powder.

[0030] Preferably, the electrolytic copper powder is electrolytic copper powder with an average particle size of 20-100 μm and a purity of 99.9%.

[0031] Preferably, the mass fraction of the process control agent is 1%...

Embodiment 1

[0043] Prepare 1wt% graphene-reinforced copper-based composite material, the specific steps are as follows:

[0044] 1. Preparation of composite powder: put electrolytic copper powder with a mass percentage of 99% and graphene with a mass percentage of 1% into a V-shaped mixer, add a process control agent made from a mixture of absolute ethanol and acetone, Then put into the steel balls that are used to mix evenly, preferably, the ball-to-material ratio of the steel balls and the material in the V-type mixer is 50:1, and the rotating speed of 120r / min is used to mechanically mix with the V-type mixer for 120h to obtain Mix the compound powder evenly.

[0045] Preferably, the electrolytic copper powder is electrolytic copper powder with an average particle size of 100 μm and a purity of 99.9%.

[0046] Preferably, the mass fraction of the process control agent is 1%, and the volume ratio of absolute ethanol and acetone in the process control agent is 3:1.

[0047] Preferably,...

Embodiment 2

[0058] Prepare 3wt% graphene-reinforced copper-based composite material, the specific steps are as follows:

[0059] 1. Preparation of composite powder: put 97% electrolytic copper powder and 3% graphene into a V-type mixer by mass percentage, add a process control agent made from a mixture of absolute ethanol and acetone, Put into the steel ball that is used for mixing again, preferably, the ball material ratio of steel ball and material in the V-type mixer is 30:1, adopts the rotating speed of 105r / min to mix 90h with V-type mixer mechanically, obtains Mix the compound powder evenly.

[0060] Preferably, the electrolytic copper powder is electrolytic copper powder with an average particle size of 60 μm and a purity of 99.9%.

[0061] Preferably, the mass fraction of the process control agent is 3%, and the volume ratio of absolute ethanol and acetone in the process control agent is 5:1.

[0062] Preferably, in the V-shaped mixer, the total amount of all the mixtures does n...

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Abstract

The plastic processing preparation method of a high-strength high-conductivity graphene reinforced copper-based composite material comprises the following steps of firstly, preparing composite powder;secondly, preparing a cold-pressed blank by pressing; thirdly, preparing an extrusion blank by vacuum hot-pressing sintering; fourthly, preparing a bar material through hot extrusion; and fifthly, preparing the graphene reinforced copper-based composite material through vacuum heat treatment. The high-strength high-conductivity graphene reinforced copper-based composite material which is nearly fully compact, good in conductivity, high in tensile strength, high in hardness and high in elongation can be prepared by adopting the steps. The high-strength high-conductivity graphene reinforced copper-based composite material prepared by the invention has the advantages of being uniform in tissue, good in interface bonding of graphene and a substrate, and stable in graphene lamellar structure.The technical problems of complex technological process, high product price, relative product density of 99% and lower, difficult two-phase interface bonding of the product, easy agglomeration of graphene and low comprehensive performance in the preparation method of the existing high-strength high-conductivity graphene reinforced copper-based composite material can be solved.

Description

technical field [0001] The invention relates to a plastic processing preparation method of a composite material, in particular to a plastic processing preparation method of a high-strength and high-conductivity graphene-reinforced copper-based composite material. Background technique [0002] Copper-based composite materials have high thermal conductivity, electrical conductivity, non-magnetic properties and better high-temperature performance, so they are widely used in resistance welding electrodes, EDM electrode materials, electronic packaging materials, lead frames for large-scale integrated circuits, and solid-state microwave Heat sink materials for electronic devices such as tubes, as well as energy, transportation, aerospace and other fields. With the rapid development of these fields, the requirements for copper-based composites are getting higher and higher. Although traditional fiber and particle reinforcements can improve the mechanical properties of copper-based ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C9/00B22F3/14B22F3/20
CPCB22F3/14B22F3/20B22F2003/208B22F2998/10C22C1/05C22C9/00B22F3/02B22F2003/248
Inventor 于洋张文丛
Owner HARBIN INST OF TECH AT WEIHAI