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Preparation method of graphene enhanced magnesium-based composite material

A composite material and graphene technology, which is applied in the field of preparation of nanocomposite materials, can solve problems such as uneven dispersion of graphene, and achieve the effect of good mechanical properties

Active Publication Date: 2014-05-07
严格集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the existing technical problem of uneven dispersion of graphene in matrix metal, thereby providing a preparation method of graphene-reinforced magnesium-based composite material

Method used

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  • Preparation method of graphene enhanced magnesium-based composite material
  • Preparation method of graphene enhanced magnesium-based composite material
  • Preparation method of graphene enhanced magnesium-based composite material

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specific Embodiment approach 1

[0019] Specific embodiment one: the preparation method of a kind of graphene-reinforced magnesium-based composite material of the present embodiment is to carry out according to the following steps:

[0020] 1. Mix graphene and alcohol dispersant in absolute ethanol, and carry out chemical dispersion under the conditions of ultrasonic power of 100-200w and ultrasonic time of 3-10h to obtain chemically dispersed graphene; wherein, the graphene The mass ratio to alcohol dispersant is 5-15:1;

[0021] 2. The chemically dispersed graphene and Zn powder obtained in step 1 are mixed and ball milled for 6 to 12 hours under the condition that the ball milling speed is 250 to 450r / min to obtain a GraZn composite powder; wherein, the mass ratio of the Zn powder to graphene is It is 10~20: 1; Described ball mill adopts steel ball and steel ball pot, and ball material mass ratio is 8~20: 1;

[0022] 3. Add the GraZn composite powder obtained in step 2 into the semi-solid Mg-Zn alloy melt...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment differs from Embodiment 1 in that: in Step 1, the ultrasonic power is 100-120w, and the ultrasonic time is 3-5 hours. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass ratio of graphene and alcohol dispersant described in step one is 10:1. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method of a graphene enhanced magnesium-based composite material, and relates to a preparation method of a nanometer composite material. The invention aims at solving the technical problem of nonuniform dispersion of the traditional graphene in a matrix metal. The preparation method comprises the following steps of 1, mixing graphene with an alcohol dispersant in absolute ethyl alcohol, chemically dispersing under an ultrasonic condition to obtain chemically dispersed graphene; 2, mixing the chemically dispersed graphene with Zn powder for ball milling to obtain Gra@Zn composite powder; 3, adding Gra@Zn composite powder to a semi-solid state Mg-Zn alloy fusant for mechanical stirring, then increasing temperature till liquid state, and stretching an ultrasonic rod below an alloy liquid level for ultrasonic dispersion treatment to obtain an alloy fusant; 4, pouring the alloy fusant into a preheated mould, and then solidifying so as to prepare the graphene enhanced magnesium-based composite material. The preparation method disclosed by the invention is applied to the field of preparation of the nanometer composite material.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite material. Background technique [0002] Graphene is a carbon atom with sp 2 The hybrid orbitals form a hexagonal planar film with a honeycomb lattice, which is a two-dimensional material with a thickness of only one carbon atom. Graphene has always been considered a hypothetical structure that cannot exist stably alone. Until 2004, physicists A.K.Geim and K.S.Novoselov of the University of Manchester successfully separated graphene from graphite through experiments and confirmed that it can exist alone. The two also jointly won the 2010 Nobel Prize in Physics for their "pioneering experiments on two-dimensional graphene materials". [0003] Graphene is currently the thinnest but also the hardest nanomaterial in the world, higher than carbon nanotubes and diamonds, and its strength is 200 times higher than steel, with a tensile modulus (stiffness) of 1TPa. Therefore, graphene can be use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/02C22C23/04
Inventor 王晓军向抒林胡小石吴昆
Owner 严格集团股份有限公司
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