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3D graphene and copper composite in-situ prepared with solid carbon source on surface of copper powder and preparing method

A composite material and solid carbon source technology, applied in the field of powder metallurgy, can solve the problems of graphene structure damage, graphene and copper powder uniform dispersion, difficult to obtain interface bonding, etc., to achieve difficult fusion bonding, high tensile strength, Good dispersion effect

Active Publication Date: 2020-04-28
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many studies focus on adding graphene to copper powder for ball milling, but it will damage the structure of graphene and it is difficult to obtain good interfacial bonding
In addition, how to uniformly disperse graphene and copper powder is also a big problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] 1 Put stainless steel balls, copper powder, magnesium oxide and polymethyl methacrylate into the ball milling tank according to the mass ratio g200:20:10:0.1, add 100ml of ethanol as the ball milling medium, and mill in a planetary ball mill at 150rpm for 80min to obtain A mixed solution of copper, magnesium oxide, polymethyl methacrylate and ethanol.

[0051] 2 Remove ethanol from the obtained mixed solution through a rotary evaporator. The temperature of the rotary evaporator is controlled at 45-55°C and the time is controlled at 50-60 minutes, and then sieved to obtain dry and uniformly dispersed copper / magnesium oxide / polymethacrylate Ester powder.

[0052] 3. The obtained mixed powder is subjected to reduction treatment in a tube furnace. The reduction treatment process includes low-temperature reduction and high-temperature reduction. The low-temperature reduction is carried out in a hydrogen atmosphere, the reduction temperature is 200 ° C, and the reduction time...

Embodiment 2

[0057] 1 Put stainless steel balls, copper powder, magnesium oxide and polymethyl methacrylate into the ball milling tank according to the mass ratio g200:20:10:0.2, add 105ml of ethanol as the ball milling medium, and mill in a planetary ball mill at 200rpm for 60min to obtain A mixed solution of copper, magnesium oxide, polymethyl methacrylate and ethanol.

[0058] 2 Remove ethanol from the obtained mixed solution through a rotary evaporator. The temperature of the rotary evaporator is controlled at 45-55°C and the time is controlled at 50-60 minutes, and then sieved to obtain dry and uniformly dispersed copper / magnesium oxide / polymethacrylate Ester powder.

[0059] 3. The obtained mixed powder is subjected to reduction treatment in a tube furnace. The reduction treatment process includes low-temperature reduction and high-temperature reduction. The low-temperature reduction is carried out in a hydrogen atmosphere, the reduction temperature is 230 ° C, and the reduction time...

Embodiment 3

[0064] 1 Put stainless steel balls, copper powder, magnesium oxide and polymethyl methacrylate into the ball milling pot according to the mass ratio g200:20:10:0.3, add 110ml of ethanol as the ball milling medium, and mill it in a planetary ball mill at 250rpm for 100min to obtain A mixed solution of copper, magnesium oxide, polymethyl methacrylate and ethanol.

[0065] 2 Remove ethanol from the obtained mixed solution through a rotary evaporator. The temperature of the rotary evaporator is controlled at 45-55°C and the time is controlled at 50-60 minutes, and then sieved to obtain dry and uniformly dispersed copper / magnesium oxide / polymethacrylate Ester powder.

[0066] 3. The obtained mixed powder is subjected to reduction treatment in a tube furnace. The reduction treatment process includes low-temperature reduction and high-temperature reduction. The low-temperature reduction is carried out in a hydrogen atmosphere, the reduction temperature is 250 ° C, and the reduction t...

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Abstract

The invention discloses a 3D graphene and copper composite in-situ prepared with a solid carbon source on the surface of copper powder and a preparing method. Stainless steel balls, copper powder, magnesium oxide and polymethyl methacrylate serve as raw materials, ethyl alcohol serves as a ball milling medium, and a mixed solution is obtained through mixing; the ethyl alcohol is removed, screeningis carried out, and dry and evenly-dispersed copper, magnesium oxide and polymethyl methacrylate powder is obtained; the copper, magnesium oxide and polymethyl methacrylate powder is subjected to low-temperature reduction treatment and high-temperature reduction treatment respectively, and in-situ grown 3D graphene, copper and magnesium oxide mixed powder is obtained; magnesium oxide in the 3D graphene, copper and magnesium oxide mixed powder is removed through acid pickling with diluted hydrochloric acid, then washing is carried out with ethyl alcohol, drying is carried out, and in-situ-grown 3D graphene and copper composite powder is obtained; the 3D graphene and copper composite powder is subjected to vacuum hot pressing sintering formation, and the 3D graphene and copper composite isobtained. According to the 3D graphene and copper composite in-situ prepared with the solid carbon source on the surface of the copper powder and the preparing method, the preparing technology is simple, and the obtained composite is high in tensile strength and good in conductivity and has well application prospects.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a 3D graphene / copper composite material prepared in situ on the surface of copper powder with a solid carbon source and a method thereof. Background technique [0002] Copper is a metal material with excellent electrical and thermal conductivity, good plasticity and ductility, and is widely used in electronics, electrical appliances, machinery and other fields. However, the disadvantages of copper, such as low strength and poor oxidation resistance, limit its further application in modern industrial systems. In order to improve the mechanical properties of copper, the traditional method is to add alloying elements or introduce a second phase as a reinforcing phase to improve the mechanical properties of copper-based composites, but the introduction of alloying elements or second phases often reduces the electrical and thermal conductivity of composites. . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/14B22F1/00C22C9/00
CPCB22F3/14C22C9/00B22F1/145
Inventor 皇志富刘朋成李克敏秦朝风赵中帅曹臻
Owner XI AN JIAOTONG UNIV
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