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A kind of graphene/copper alloy and its preparation and application

A graphene and copper alloy technology, applied in the field of materials, can solve problems such as easy agglomeration interface bonding, difficulties in graphene/metal composite materials, and low graphene density

Active Publication Date: 2021-04-02
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the low density of graphene, easy agglomeration, and interface bonding during the preparation process are important reasons that restrict the development of graphene / metal composites.
It will become extremely difficult to obtain high-performance graphene / metal composites using traditional smelting metallurgy methods, thus hindering the development of some original research work in this field, and at the same time prompting researchers to propose in the preparation of composite materials new method

Method used

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  • A kind of graphene/copper alloy and its preparation and application
  • A kind of graphene/copper alloy and its preparation and application
  • A kind of graphene/copper alloy and its preparation and application

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preparation example Construction

[0059] The invention provides a kind of preparation method of graphene / copper alloy, described method comprises the steps:

[0060] 1) providing a first mixture comprising copper powder and an optional dispersant;

[0061] 2) The first mixture is placed in a reaction furnace, under a first pressure, a first temperature and an optional first gas, a gaseous carbon source material is introduced to react to obtain a graphene / copper composite material;

[0062] 3) Sintering the graphene / copper composite material to obtain the graphene / copper alloy.

[0063] In the present invention, the dispersant includes (but is not limited to) the following group: ceramic powder, graphite powder, or a combination thereof.

[0064] In another preferred example, the ceramic powder includes (but is not limited to) the following group: carbide ceramic powder, boride ceramic powder, nitride ceramic powder, oxide ceramic powder, silicate ceramic powder, or a combination thereof .

[0065] In the pr...

Embodiment 1

[0086] Embodiment 1 Graphene / copper alloy 1

[0087] Mix high-purity copper powder and silicon dioxide with an average particle size of 50 μm in a mixer, and the mass fraction of copper powder is 80%, put it into a CVD furnace, evacuate to a vacuum of 8Pa, and then pass it into the Hydrogen gas, the pressure is 50Pa, the heating rate is 10°C / min, the temperature is raised to 800°C, the temperature is kept for 30min, and then methane gas is introduced, the gas flow rate is 100sccm, and the growth is 60min. The grown mixed powder was taken out, and ultrasonically cleaned in alcohol to obtain a copper powder composite material coated with graphene on the entire surface and uniformly dispersed, that is, composite material 1. The composite material 1 was hot-pressed and sintered, the background vacuum was 5 Pa, the temperature was 1000° C., and the processing time was 30 minutes to obtain the bulk graphene / copper alloy 1 .

[0088] figure 1 It is the SEM result of composite mater...

Embodiment 2

[0107] Embodiment 2 Graphene / copper alloy 2

[0108] Mix high-purity copper powder and titanium carbide with an average particle size of about 30 μm in a mixer, and the mass fraction of copper powder is 90%, put it into a CVD furnace, vacuumize to a vacuum degree of 5Pa, and then pass it into the Hydrogen gas, the pressure is 100Pa, the heating rate is 10°C / min, the temperature is raised to 900°C, the temperature is kept for 30min, and then acetylene gas is introduced, the gas flow rate is 200sccm, and the growth is 60min. The grown mixed powder was taken out, and ultrasonically cleaned in alcohol to obtain a copper powder composite material coated with graphene on the entire surface and uniformly dispersed, that is, composite material 2. The composite material 2 was hot-pressed and sintered, the background vacuum was 5 Pa, the temperature was 900° C., and the processing time was 60 minutes to obtain a block graphene / copper alloy 2 .

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Abstract

The invention relates to a graphene / copper alloy and its preparation and application. Specifically, the present invention discloses a method for preparing graphene / copper alloy, said method comprising the steps of: 1) providing a first mixture, said first mixture comprising copper powder and an optional dispersant; 2) adding The first mixture is placed in a reaction furnace, and under the first pressure, the first temperature and the optional first gas, the gaseous carbon source material is introduced to react to obtain the graphene / copper composite material; 3) sintering the Graphene / copper composite material, obtain described graphene / copper alloy. The invention also discloses the graphene / copper alloy prepared by the method and its application. The preparation method has the characteristics of simple process, cheap and easy-to-obtain raw materials, safety and environmental protection, low cost and easy large-scale popularization. The graphene / copper alloy has high purity, high electrical conductivity, high thermal conductivity, and excellent thermal oxidation resistance even under wear.

Description

technical field [0001] The invention relates to the field of materials, in particular to a graphene / copper alloy and its preparation and application. Background technique [0002] Copper is a material with good electrical conductivity, ductility and thermal conductivity, and is widely used in industries such as electrical, mechanical and national defense. The fly in the ointment is that the strength of copper is very low. In the application of electronic devices (such as PCB boards), the strength is not high enough to cause various problems, such as shortened lifespan and easy damage. With the development of society and the shortage of energy sources, people have more demands for lightweight and high-strength materials, and copper-based composite materials are an ideal material to meet these requirements. In the preparation of high-strength copper materials (such as beryllium bronze with a strength of up to 1500MPa), the traditional method is achieved by means of alloying a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C1/10C22C9/00C22C32/00B22F1/02
CPCC22C1/05C22C9/00C22C32/0084B22F1/16
Inventor 林正得江南戴丹
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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