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A kind of preparation method of graphene reinforced copper-based composite material

A copper-based composite material and graphene technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of poor dispersion and poor metal wettability, and achieve the effect of fast temperature rise, uniform heating, and good tissue performance

Active Publication Date: 2017-10-27
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the poor dispersion of graphene in the metal matrix as a reinforcing phase and the poor wettability with the matrix metal

Method used

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  • A kind of preparation method of graphene reinforced copper-based composite material
  • A kind of preparation method of graphene reinforced copper-based composite material
  • A kind of preparation method of graphene reinforced copper-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the graphene-reinforced copper-based composite material described in this embodiment specifically comprises the following steps:

[0032] (1) Mix graphene (thickness 0.8~1.2nm), nano-copper powder (R200~500nm), nano-cobalt powder (R 30~100nm) to obtain a mixed material, and the volume ratio of ethanol to mixed powder is 2:1 The ratio of the mixed material is placed in absolute ethanol (mass percentage concentration of absolute ethanol ≥ 99.7%), shaken on an electromagnetic oscillator (power 150w) for 1 hour to physically disperse the mixed slurry, and graphene in the mixed material The mass percentage is 0.1%, the mass percentage of nano cobalt powder is 5%, and the mass percentage of nano copper powder is 94.9%.

[0033] (2) Put the mixed slurry in a ball mill for 2 hours to obtain a composite powder, wherein the rotational speed during the ball milling process is 100r / min, the ball-to-material ratio is 5:1, and the composite powder is dried i...

Embodiment 2

[0039] The preparation method of the graphene-reinforced copper-based composite material described in this embodiment specifically comprises the following steps:

[0040](1) Mix graphene (thickness 0.8~1.2nm), nano-copper powder (R200~500nm), nano-cobalt powder (R 30~100nm) to obtain a mixed material, and the volume ratio of ethanol to mixed powder is 3:1 Put the mixed material in absolute ethanol (mass percentage concentration of absolute ethanol ≥ 99.7%), vibrate on an electromagnetic oscillator (power 100w) for 2 hours to physically disperse the mixed slurry, and graphene in the mixed material The mass percentage is 0.6%, the mass percentage of nano cobalt powder is 1%, and the mass percentage of nano copper powder is 98.4%.

[0041] (2) Put the mixed slurry in a ball mill for ball milling for 6 hours to obtain a composite powder, wherein the rotational speed during the ball milling process is 300r / min, the ball-to-material ratio is 20:1, and the composite powder is dried i...

Embodiment 3

[0047] The preparation method of the graphene-reinforced copper-based composite material described in this embodiment specifically comprises the following steps:

[0048] (1) Mix graphene (thickness 0.8~1.2nm), nano-copper powder (R200~500nm), nano-cobalt powder (R 30~100nm) to obtain a mixed material, and the volume ratio of ethanol to mixed powder is 5:1 The ratio of the mixed material is placed in absolute ethanol (mass percentage concentration of absolute ethanol ≥ 99.7%), shaken on an electromagnetic oscillator (power 80w) for 4 hours to physically disperse the mixed slurry, and graphene in the mixed material The mass percentage is 1%, the mass percentage of nano cobalt powder is 2%, and the mass percentage of nano copper powder is 96%.

[0049] (2) Put the mixed slurry in a ball mill for ball milling for 10 hours to obtain a composite powder, wherein the rotational speed during the ball milling process is 400r / min, the ball-to-material ratio is 10:1, and the composite po...

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Abstract

The invention discloses a method for preparing a graphene-reinforced copper-based composite material, which belongs to the field of preparation of high-strength and high-conductivity composite materials. According to the method of the present invention, graphene, nano-copper powder and cobalt powder are mixed in absolute ethanol according to the required mass ratio, and physically dispersed under electromagnetic stirring, and then the physically dispersed mixed slurry is added to a ball mill tank for mechanical Ball milling; after the uniformly mixed slurry is centrifugally dried, the obtained mixed powder is annealed and then subjected to SPS hot pressing and sintering; the obtained block blank is subjected to hot extrusion after annealing to obtain a graphene-reinforced copper-based composite material. The graphene-reinforced copper-based composite material prepared by the invention is a graphene-reinforced copper-based composite material with good mechanical properties, uniform structure and good thermal and electrical conductivity.

Description

technical field [0001] The invention relates to a method for preparing a graphene-reinforced copper-based composite material, and belongs to the technical field of preparation of high-strength and high-conductivity composite materials. Background technique [0002] Graphene is made of carbon atoms sp 2 A two-dimensional honeycomb substance formed by hybridization. The special structure of graphene determines its excellent performance. Graphene has been proven to be the thinnest and hardest substance found in the world; its specific surface area can reach 2630m 2 / g; its thermal conductivity is also the highest among known substances (5000Wm -1 K -1 ); at room temperature, the graphene carrier mobility is as high as 2×10 5 cm 2 / (V•s), the light transmittance reaches 97.7%, and the elastic modulus (1100GPa) and tensile strength (125GPa) of graphene are both very large. Therefore, graphene, as an excellent nano-reinforcement phase, has broad prospects in the field of m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C9/06
CPCC22C1/05C22C9/06B22F2999/00B22F2998/10B22F2003/208B22F2202/13B22F1/0003B22F1/142B22F2003/145B22F3/02
Inventor 闫翠霞凌自成启华荣杨应湘冯中学王效琪陈亮维史庆南
Owner KUNMING UNIV OF SCI & TECH
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