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Preparation method for composite powder of graphene and metal aluminum powder

A technology of composite powder and metal aluminum powder, which is applied in the field of nanosheet structure reinforced metal matrix composite materials, can solve the problems of graphene microstructure damage, damage to graphene structure state, and reduce the intrinsic properties of graphene, so as to achieve low toxicity, Toxicity-safe, easy-to-handle effects

Inactive Publication Date: 2017-07-04
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chemical method: Some organic chemical reagents need to be applied. Most of these reagents have a certain impact on the environment and the physical safety of the experimenter. At the same time, the structural state of the graphene surface may be damaged by chemical action during the process, and oxygen-containing or hydrogen-containing functional groups may be introduced. , causing damage to the graphene microstructure and reducing the intrinsic properties of graphene to varying degrees

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  • Preparation method for composite powder of graphene and metal aluminum powder
  • Preparation method for composite powder of graphene and metal aluminum powder

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Experimental program
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Effect test

Embodiment 1

[0050] Follow the specific steps described above to operate. The graphene content is 0.3 wt.%, and the aluminum powder content is 99.7 wt.%. The thickness of the graphene sheet is between 3 and 18 layers, the average particle size of the aluminum powder is selected to be about 15 μm, and the purity is 99.8 wt.%. In the pre-dispersion process, 0.3 g of graphene was added, the amount of anhydrous ethanol was 100 mL, the stirring speed was 20 r / min, the ultrasonic vibration frequency was 60 Hz, the action time was 20 min, and the solution temperature was room temperature 20 °C. In the ball milling process, the ratio of ball to material is 4:1, the ball milling time is 0.5h, and the speed of the ball mill is 200r / min. The drying temperature is 90°C, the time is 64 hours, and the vacuum degree at the end of drying is 4×10 -2 Pa.

[0051] The deformation of the composite powder aluminum powder prepared by the above process is about -40%, the graphene is well dispersed, and the al...

Embodiment 2

[0053] The graphene content is 8.5 wt.%, and the aluminum powder content is 91.5 wt.%. The thickness of the graphene sheet is between 3 and 18 layers, the average particle size of the aluminum powder is selected to be about 55 μm, and the purity is 99.8 wt.%. In the pre-dispersion process, 8.5 g of graphene was added, the amount of anhydrous ethanol was 1000 mL, the stirring speed was 120 r / min, the ultrasonic vibration frequency was 120 Hz, the action time was 360 min, and the solution temperature was room temperature 25 °C. In the ball milling process, the ball-to-material ratio is 50:1, the ball milling time is 50h, and the ball mill rotating speed is 40r / min. The drying temperature is 240°C, the time is 8 hours, and the vacuum degree at the end of drying is 4.5×10 -2 Pa.

[0054] The deformation amount of the composite powder aluminum powder prepared by the above process is about -70%, the graphene is well dispersed, and the flake effect of the aluminum powder is larger ...

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Abstract

The invention relates to a preparation method for composite powder of graphene and metal aluminum powder, and belongs to the field of nanosheet structure reinforced metal base composite materials. The preparation method comprises the following steps of: taking grapheme and metal aluminum powder as raw materials, and performing pre-dispersing through a mechanical stirring method, an ultrasonic vibrating method and a chemical reagent dispersing method; and then, preparing the composite powder by ball-milling, wherein the composite powder comprises the following components in percentage by weight: 0.3 wt.%-8.5wt.% of graphene and 91.5wt.%-99.7wt.% of aluminum powder. According to the preparation method, aluminum powder generates the laminarization effect, so that the morphology of the aluminum powder is changed into a cake shape or an ellipsoid shape from a spherical shape, dimension deformation percentage of the aluminum powder ranges from (-)200% to 200%, and graphene is uniformly distributed in aluminum powder. The obtained composite powder is low in impurity content, has moisture content lower than 0.01wt.%, and realizes kilogram-level composite powder preparation; and the preparation method is nontoxic and safe.

Description

technical field [0001] The invention relates to a preparation method of graphene and metal aluminum powder composite powder. The method adopts graphene and spherical aluminum powder as raw materials, and comprehensively uses chemical methods, ultrasonic vibration, mechanical stirring, wet ball milling and other methods to obtain graphene in a cake. The composite powder is uniformly distributed in the aluminum powder in the shape of an ellipsoid or ellipsoid, and belongs to the field of nano-sheet structure reinforced metal matrix composite materials. Background technique [0002] Under the action of the reinforcing phase and the metal matrix, a metal matrix composite material with high comprehensive performance can be obtained, and its comprehensive performance is better than that of any single reinforcing phase and matrix. The properties of metal matrix composites are directly related to the intrinsic properties of the reinforcing phase and the metal matrix, and are also re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04C22C21/00C22C32/00
CPCB22F1/0003B22F9/04B22F2009/043C22C21/00C22C32/0084
Inventor 郝心想樊建中马自力刘彦强魏少华赵月红左涛杨必成
Owner GRIMAT ENG INST CO LTD
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