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Graphene enhanced magnesium-based composite and preparing method thereof

A composite material and graphene technology, which is applied in the field of graphene-reinforced magnesium-based composite materials and its preparation, can solve the problems of unfriendly environment, difficult to remove impurities, impurity elements, etc., achieve simple process flow, wide application prospects, and improve mechanical properties. performance effect

Active Publication Date: 2016-06-01
BEIJING UNIV OF TECH
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Problems solved by technology

[0005] In summary, the realization of sufficient dispersion of graphene in the magnesium matrix is ​​the key technology for the preparation of graphene-reinforced magnesium-based composites, and it is also a difficult point. The existing preparation methods still suffer from uneven dispersion of graphene and defects in the structure of graphene itself. and the introduction of impurity elements; however, in order to obtain graphene with good dispersion, the introduction of organic surface treatment agents through chemical methods will bring disadvantages such as difficult to remove impurities and unfriendly environment

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  • Graphene enhanced magnesium-based composite and preparing method thereof
  • Graphene enhanced magnesium-based composite and preparing method thereof

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Embodiment 1

[0023] The technique of the graphene reinforced pure magnesium-based composite material of the present embodiment is carried out in the following steps:

[0024] (1) Graphene powder 30g with a sheet size of 100 μm is mixed with 470 g of pure magnesium particles with a particle size of 50 μm for 30 min by ball milling. The ball milling process is carried out under an argon atmosphere, and the material of the ball mill jar is an agate jar. The ball milling speed is 600rpm; the mass fraction of graphene in the mixed powder is 6wt.%, and the ball-to-material ratio is 15:1;

[0025] (2) Place the mixed powder obtained by ball milling in step (1) in an ethanol solvent for ultrasonic dispersion with a power of 200W and a time of 120min, accompanied by mechanical stirring; subsequently, the resulting mixed solution is stirred and heated to remove the solvent and Vacuum drying, stirring and heating temperature is 35°C, vacuum drying temperature is 35°C, stirring rate is 600rpm, to obta...

Embodiment 2

[0029] The technique of the graphene reinforced Mg-Zn series magnesium-based composite material of the present embodiment is carried out in the following steps:

[0030] (1) 0.8 g of graphene powder with a sheet size of 80 μm and 799.2 g of pure magnesium particles with a particle size of 30 μm were ball milled for 60 minutes. The ball milling process was carried out under an argon atmosphere, and the material of the ball mill was agate. tank, the ball milling speed is 400rpm; the mass fraction of graphene in the mixed powder is 0.1wt.%, and the ball-to-material ratio is 2:1;

[0031] (2) Place the mixed powder obtained by ball milling in step (1) in an ethanol solvent for ultrasonic dispersion with a power of 400W and a time of 60min, accompanied by mechanical stirring; subsequently, the resulting mixed solution is stirred and heated to remove the solvent and Vacuum drying, stirring and heating temperature is 35°C, vacuum drying temperature is 35°C, stirring rate is 400rpm, t...

Embodiment 3

[0035] The technique of the graphene reinforced Mg-Al series magnesium-based composite material of the present embodiment is carried out in the following steps:

[0036] (1) Graphene powder 5g with a sheet size of 20 μm is mixed with 495 g of pure magnesium particles with a particle size of 10 μm for 180 min by ball milling. The ball milling process is carried out under an argon atmosphere, and the material of the ball mill jar is an agate jar. The ball milling speed is 200rpm; the mass fraction of graphene in the mixed powder is 1wt.%, and the ball-to-material ratio is 8:1;

[0037] (2) Place the mixed powder obtained by ball milling in step (1) in an ethanol solvent for ultrasonic dispersion with a power of 800W and a time of 15min, accompanied by mechanical stirring; subsequently, the resulting mixed solution is stirred and heated to remove the solvent and Vacuum drying, stirring and heating temperature is 55°C, vacuum drying temperature is 55°C, stirring rate is 200rpm, to...

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Abstract

The invention relates to a graphene enhanced magnesium-based composite and a preparing method thereof, and belongs to the technical field of composites. In the inert atmosphere, graphene with a certain lamella size and pure magnesium particles are subjected to ball-milling treatment, and meanwhile peeling of a graphene lamella and mixing between the graphene lamella and the pure magnesium particles are achieved; an ultrasonic dispersing and mechanical stirring technology is adopted, the peeled graphene lamella is further dispersed in a liquid phase, the pure magnesium particles are inserted in the parts among graphene layers in the stirring process, and the solid phase interval and sufficient mixing between the pure magnesium particles and the graphene layers are achieved; the compactness of graphene / pure magnesium particle composite powder is enhanced through a thermal extrusion technology, a magnesium-based precursor containing graphene is obtained, and the graphene enhanced magnesium-based composite is finally obtained through an alloy component blending and stirring casting method. The method technology is simple and convenient to conduct, environment friendliness is achieved, and sufficient dispersing of graphene in a magnesium base body is achieved. The graphene / magnesium-based composite with the enhanced mechanical performance is obtained, and wide application prospects are achieved in the fields such as aerospace, automobiles and electronics.

Description

technical field [0001] The invention relates to a graphene-reinforced magnesium-based composite material and a preparation method thereof, belonging to the technical field of metal-based composite material preparation. Background technique [0002] With the development of modern high-tech scientific industries, especially the rapid development of aerospace, aviation, electronics, automobiles, and advanced weapon systems, the demand for lightweight, high-strength structural materials is increasingly strong. In order to overcome the limitations of single materials in performance, the development of composite materials can not only meet the requirements of various special and comprehensive properties, but also make more economical use of materials. Compared with traditional metals, metal matrix composites have higher specific strength and specific stiffness, and their application fields are gradually expanding. Among metal matrix composites, magnesium-based composites have bro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C23/00C22C1/02
CPCC22C1/02C22C1/1015C22C23/00C22C1/1047
Inventor 杜宪杜文博王朝辉刘轲李淑波
Owner BEIJING UNIV OF TECH
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