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Preparation method of high-performance graphene nanosheet reinforced magnesium matrix composite

A technology of graphene nanosheets and composite materials, which is applied in the field of preparation of graphene nanosheets reinforced magnesium-based composite materials, can solve problems such as poor wettability and uneven dispersion, achieve improved mechanical properties, simple process, and solve the problem of wetting poor sex effect

Inactive Publication Date: 2014-05-07
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of poor wettability and uneven dispersion of graphene nanosheets in the matrix metal, and to provide a preparation method for high-performance graphene nanosheets reinforced magnesium-based composite materials

Method used

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  • Preparation method of high-performance graphene nanosheet reinforced magnesium matrix composite
  • Preparation method of high-performance graphene nanosheet reinforced magnesium matrix composite
  • Preparation method of high-performance graphene nanosheet reinforced magnesium matrix composite

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specific Embodiment approach 1

[0018] Specific embodiment one: the preparation method of the high-performance graphene nanosheet reinforced magnesium-based composite material of this embodiment is carried out according to the following steps:

[0019] 1. Mix graphene nanosheets and Zn powder, and ball mill at a speed of 250r / min to 450r / min for 6h to 12h to obtain a GnpZn composite powder, wherein the mass ratio of Zn powder to Gnp in the GnpZn composite powder is 10 to 15: 1;

[0020] 2. Add the composite powder obtained in step 1 into the Mg-Zn alloy melt, and stir at 530°C-630°C for 10min-20min, wherein the mass fraction of Zn in the Mg-Zn alloy melt is 2%-6%, The mass fraction of Gnp in the mixed alloy melt is 0.3% to 3%;

[0021] 3. Raise the temperature of the mixed alloy melt obtained in step 2 to 650°C-750°C, and then perform ultrasonic treatment, the ultrasonic power is 500w-800w, and the ultrasonic time is 5min-10min;

[0022] 4. Pouring the mixed melt after ultrasonic treatment in step 3 into a...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that: the mass ratio of Zn powder to Gnp in the GnpZn composite powder described in step 1 is 10˜13.5:1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the ball mill described in step 1 uses steel balls and steel ball tanks, and the mass ratio of balls to materials is 8-15:1. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a high-performance graphene nanosheet reinforced magnesium matrix composite, relates to a preparation method of a graphene nanosheet reinforced magnesium matrix composite, and aims at solving the problems that a graphene nanosheet has relatively low wettability and is not uniformly dispersed in a matrix metal. The method comprises the following steps: (I) mixing and ball-milling the graphene nanosheet and Zn powder; (II) adding the composite powder into an Mg-Zn alloy melt; (III) performing ultrasonic treatment; (IV) pouring and solidifying. According to the method disclosed by the invention, the preparation process of the composite is simple and feasible, the mechanical properties of the prepared composite are remarkably improved, and the graphene nanosheet has good wettability and is uniformly dispersed in the matrix metal. The method disclosed by the invention is applied to preparation of a high-performance graphene nanosheet reinforced magnesium matrix composite.

Description

technical field [0001] The invention relates to a method for preparing a graphene nanosheet-reinforced magnesium-based composite material, and belongs to the technical field of nanocomposite material preparation. 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 s...

Claims

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Application Information

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IPC IPC(8): C22C1/02C22C1/10C22C23/04
Inventor 王晓军向抒林胡小石吴昆
Owner HARBIN INST OF TECH
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