Method for preparing graphene reinforced copper base composite material

A technology of copper-based composite materials and graphene, which is applied in the field of preparing graphene-reinforced copper-based composite materials, can solve problems such as poor wettability and low graphene density, and achieve the effect of improving strength

Inactive Publication Date: 2016-12-07
JIANGXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The method for preparing graphene-reinforced copper-based composite materials provided by the present invention is aimed at the problems of low graphene density and poor wettability with copper in the traditional melting and casting process, and achieves graphene in copper by improving the melting and casting technology. Evenly distributed in the matrix to improve the strength and hardness of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Prepare a flat-bottomed mold, and adjust the bottom plane of the mold to be horizontal; prepare 1 volume part of graphene powder and 18 volume parts of pure copper powder, mix them and place them in a grinding vessel to grind them evenly; the grinding time is 30 seconds; mix well The powder is evenly spread on the bottom of the mold.

[0026] 2) Cover the top of the powder with a 1mm thick pure copper sheet adapted to the size of the bottom of the mold, and the gap between the thin pure copper sheet and the bottom side wall is 0.5 mm.

[0027] 3) Slowly pour the smelted copper liquid at 1080°C into the mold; the pouring speed of the copper liquid is controlled so that the rising speed of the liquid level in the mold is kept at 0.5 mm / s. The sum of the volume parts of copper liquid and thin pure copper sheet is 991 parts. The volume ratio of graphene to copper is 0.1%.

[0028] 4) After cooling, a 30mm graphene-reinforced copper-based composite material was obtained...

Embodiment 2

[0030] 1) Prepare a flat-bottomed mold, and adjust the bottom plane of the mold to be horizontal; prepare 5 parts by volume of graphene powder and 92 parts by volume of pure copper powder, mix them and place them in a grinding vessel to grind them evenly; the grinding time is 20 seconds; mix well The powder is evenly spread on the bottom of the mold.

[0031] 2) Cover the top of the powder with a 0.8mm thick pure copper sheet adapted to the size of the bottom of the mold, and the gap between the thin pure copper sheet and the bottom side wall is 0.3 mm.

[0032] 3) The smelted copper liquid with a temperature of 1080°C is slowly poured into the mold; the pouring speed of the copper liquid is controlled so that the rising speed of the liquid level in the mold is kept at 1 mm / s. The sum of the volume parts of copper liquid and thin pure copper sheet is 903 parts. The volume ratio of graphene to copper is 0.5%.

[0033] 4) After cooling, a 25mm graphene-reinforced copper-based ...

Embodiment 3

[0035] 1) Prepare a flat-bottomed mold, and adjust the bottom plane of the mold to be horizontal; prepare 10 parts by volume of graphene powder and 190 parts by volume of pure copper powder, mix them and place them in a grinding vessel to grind them evenly; the grinding time is 70 seconds; mix well The powder is evenly spread on the bottom of the mold.

[0036] 2) Cover the top of the powder with a 1mm thick pure copper sheet adapted to the size of the bottom of the mold, and the gap between the thin pure copper sheet and the bottom side wall is 0.2 mm.

[0037] 3) The smelted copper liquid with a temperature of 1080°C is slowly poured into the mold; the pouring speed of the copper liquid is controlled so that the rising speed of the liquid level in the mold is maintained at 1.5 mm / s. The sum of the volume parts of copper liquid and thin pure copper sheet is 800 parts. The graphene to copper volume ratio is 1%.

[0038] 4) After cooling, a 26mm graphene-reinforced copper-bas...

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Abstract

The invention discloses a method for preparing a graphene reinforced copper base composite material. Uniformly mixed graphene and copper powder are covered by a thin pure copper chip; the pouring speed is not higher than 1 mm/s; the influence on the graphene dispersing process by flowing of molten copper in the pouring process is controlled; and the temperature of the poured molten copper is not lower than 1080 DEG C and not higher than 1200 DEG C. The method can prominently improve distribution of graphene in a copper matrix in the process of using a casting method to prepare the graphene reinforced copper base composite material, and enhances the material strength and hardness; the average hardness of the graphene reinforced copper base composite material in the method can reach above 80 HV; the electric conductivity under normal temperature is not lower than 80% IACS; and the heat conducting coefficient under normal temperature is not lower than 339 w/(mK).

Description

technical field [0001] The invention relates to a method for preparing a graphene-reinforced copper-based composite material. Background technique [0002] Graphene has good electrical and thermal conductivity and extremely high strength, and is the strongest substance known to mankind. Graphene has a wide range of applications, such as high-strength and high-conductivity composite materials, transparent conductive electrodes, electronic products, and so on. Copper-based composite materials have good electrical and thermal conductivity and processing properties, and are widely used in the fields of electronic products, aerospace and automobiles. Traditional copper-based composite materials have higher strength, but the electrical and thermal conductivity will be reduced. Graphene is an ideal copper-based reinforcement due to its good electrical and thermal conductivity and strength. [0003] At present, there are four main methods for the preparation of graphene-reinforce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C9/00
CPCC22C1/1036C22C9/00C22C1/1047
Inventor 汪航龚留奎张敏范国强
Owner JIANGXI UNIV OF SCI & TECH
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