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Preparation method of graphene-reinforced copper-based composite

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: 2016-06-01
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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  • Preparation method of graphene-reinforced copper-based composite
  • Preparation method of graphene-reinforced copper-based composite
  • Preparation method of graphene-reinforced copper-based composite

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 (R30~100nm) to obtain a mixed material, and the volume ratio of ethanol to mixed powder is 2:1 Proportion Put the mixed material in absolute ethanol (mass percentage concentration of absolute ethanol ≥ 99.7%), vibrate 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 the nano-cobalt powder is 5%, and the mass percentage of the 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 (R30~100nm) to obtain a mixed material, according to the volume ratio of ethanol and mixed powder is 3:1 Proportion 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 the nano-cobalt powder is 1%, and the mass percentage of the 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...

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 (R30~100nm) to obtain a mixed material, and the volume ratio of ethanol to mixed powder is 5:1 Proportion Put the mixed material in absolute ethanol (mass percentage concentration of absolute ethanol ≥ 99.7%), vibrate on an electromagnetic oscillator (power 80w) for 4 hours to physically disperse the mixed slurry, and the graphene in the mixed material The mass percentage is 1%, the mass percentage of the nano-cobalt powder is 2%, and the mass percentage of the 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 composit...

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Abstract

The invention discloses a preparation method of a graphene-reinforced copper-based composite and belongs to the field of preparation of high-strength and high-conductivity composites. The method comprises steps as follows: graphene, nano copper powder and cobalt powder in the required mass ratio are mixed in absolute ethyl alcohol, the mixture is physically dispersed under electromagnetic stirring, and then physically dispersed mixed slurry is added to a ball milling tank for mechanical ball milling; after evenly mixed slurry is centrifugally dried, obtained mixed powder is annealed and then subjected to hot-pressing SPS (spark plasma sintering) forming; an obtained block blank is annealed and then subjected to hot extrusion, and the graphene-reinforced copper-based composite is obtained. The graphene-reinforced copper-based composite prepared through the method has the good mechanical property, uniform structure and good heat and electricity 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 me...

Claims

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Application Information

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Patent Type & Authority Applications(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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