Preparation method of graphene reinforced metal-matrix composite

A composite material and metal composite technology, which is applied in the field of composite materials, can solve problems such as low efficiency, inapplicability, and complicated extrusion and weaving processes, and achieve the effects of enhanced electrical and thermal conductivity, improved affinity, and enhanced mechanical properties

Active Publication Date: 2012-01-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Obviously, this method has great limitations when it is applied to metal matrix materials: the extrusion and weaving processes of graphene/metal microfibers are quite complicated and inefficient, and are not

Method used

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  • Preparation method of graphene reinforced metal-matrix composite
  • Preparation method of graphene reinforced metal-matrix composite
  • Preparation method of graphene reinforced metal-matrix composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add graphene oxide into deionized water, ultrasonically disperse for 2 hours to uniformly disperse graphene oxide, then add deionized water to adjust the concentration of graphene oxide to obtain a 1.0 mg / mL graphene oxide ethanol solution;

[0031]Under the condition of heating in a constant temperature water bath at 98°C, dissolve polyvinyl alcohol in deionized water, mechanically stir until completely dissolved, add deionized water after cooling to room temperature to adjust the concentration of polyvinyl alcohol, and obtain a 3wt% polyvinyl alcohol aqueous solution;

[0032] Take 100g of aluminum powder and weigh 1g of stearic acid, and add them together into a stirring ball mill for dry grinding for 1 hour to obtain flake aluminum powder with a thickness of 2 μm, and put it into a box furnace at 400°C for pyrolysis. Stearic acid is removed to obtain the desired flake aluminum powder. Since metal aluminum is very active and easily reacts with various substances, a c...

Embodiment 2

[0046] Add graphene oxide into ethanol and add a small amount of chitosan, ultrasonically disperse for 2 hours to disperse graphene oxide evenly, then add ethanol to adjust the graphene concentration to obtain a 2.0mg / mL graphene oxide ethanol solution;

[0047] Dissolving polyvinylpyrrolidone in ethanol and adding a small amount of hydrazine hydrate to it, mechanically stirring until completely dissolved, cooling to room temperature, adding ethanol to adjust the concentration of polyvinylpyrrolidone to obtain a 5wt% polyvinylpyrrolidone ethanol solution;

[0048] Take 100g of 6061 aluminum alloy powder, add 1g of stearic acid, add it to a stirring ball mill and dry grind it to a flake-shaped 6061 aluminum alloy flake powder with a thickness of 1 μm, and put it in argon gas in a box-type resistance furnace at 400°C. Pyrolysis in the atmosphere removes stearic acid;

[0049] Add it to 1L of 5wt% polyvinylpyrrolidone ethanol solution, stir magnetically for 0.5 hours, then wash a...

Embodiment 3

[0053] Add graphene oxide into deionized water and add a small amount of sodium lauryl sulfate, ultrasonically disperse for 2 hours to disperse graphene evenly, then add deionized water to adjust the concentration of graphene oxide to obtain a 5.0mg / mL graphene oxide aqueous solution ;

[0054] Under the condition of heating in a constant temperature water bath at 98°C, dissolve polyvinyl alcohol in deionized water and add a small amount of ethylenediamine to it, stir mechanically until it is completely dissolved, and then add deionized water to adjust the concentration of polyvinyl alcohol after cooling to room temperature to obtain 0.2 wt% polyvinyl alcohol aqueous solution;

[0055] Take 200g of copper powder, add 200mL of pure water, and add it to a planetary ball mill for wet grinding to obtain a slurry of flaky copper powder with a thickness of 500nm, then perform suction filtration and drying to obtain a copper powder with a thickness of 500nm;

[0056] Take 100g of co...

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Abstract

The invention discloses a preparation method of a graphene reinforced metal-matrix composite, which comprises the following steps of: firstly, dispersing the graphene oxide on the surface of the flaky metal powder; and then obtaining the graphene/metal composite powder through the reducing treatment; and at last, carrying out densification treatment by adopting a powder metallurgic technology to obtain the compact graphene reinforced metal-matrix composite. The flaky metal powder has the plane two-dimensional form, is inclined to the directional piling to form a laminated structure, and is helpful for inducing the graphene orientation distribution and giving play to the reinforcing effect. The preparation method disclosed by the invention is simple and feasible, is capable of regulating the graphene content and is suitable for preparing the massive composite.

Description

technical field [0001] The invention relates to a material in the technical field of composite materials and a preparation method thereof, in particular to a preparation method of a graphene-reinforced metal matrix composite material. Background technique [0002] Graphene is a new type of two-dimensional planar carbonaceous nanomaterial discovered and synthesized in recent years, with unparalleled high electron mobility (~200000 cm 2 / V s), thermal conductivity (~5000 W / m K), Young's modulus (1100 GPa) and fracture strength (125GPa), exhibiting excellent electrical, thermal and mechanical properties. Compared with carbon nanotubes, graphene has similar physical properties, larger specific surface area and lower production cost, so graphene is not only optimistic about the next generation of electronic materials, but also is expected to replace carbon nanotubes as future composite materials. Ideal filler or reinforcement. Therefore, the research and development of graphene...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10
Inventor 李志强王景月潘欢欢范根莲张荻
Owner SHANGHAI JIAO TONG UNIV
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