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A method for reinforcing magnesium-based composite materials with heterogeneous structure nano-carbon materials

A technology of nano-carbon materials and composite materials, which is applied in the field of preparation of magnesium-based composite materials, can solve the problems of low strength, poor plasticity and corrosion resistance, and restrict large-scale application, and achieve excellent performance, obvious fine-grain effect, and mechanical properties. good performance

Active Publication Date: 2020-03-31
YICHUN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its low strength, poor plasticity and poor corrosion resistance severely restrict its large-scale application in the field of structural materials.

Method used

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  • A method for reinforcing magnesium-based composite materials with heterogeneous structure nano-carbon materials
  • A method for reinforcing magnesium-based composite materials with heterogeneous structure nano-carbon materials
  • A method for reinforcing magnesium-based composite materials with heterogeneous structure nano-carbon materials

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Effect test

Embodiment 1

[0022] A method for reinforcing a magnesium-based composite material with a special-shaped nano-carbon material comprises the following steps.

[0023] (1) Add multi-walled carbon nanotubes with a diameter > 200 nm to 400 ml of a mixed solution of concentrated sulfuric acid and concentrated nitric acid at a ratio of 1 g: 200 ml (concentrated sulfuric acid: concentrated nitric acid = 1:4).

[0024] (2) Add potassium permanganate to the mixed acid solution containing multi-walled carbon nanotubes in step (a) at a concentration of 0.005g / ml, heat in a water bath at 80°C for 4 hours, wash with deionized water and freeze-dry in vacuum Obtain heterostructured carbon nanomaterials in which the outer tube wall of multi-walled carbon nanotubes is cut, figure 1 and figure 2 Its SEM morphology and structural schematic diagram.

[0025] (3) Use the liquid dispersion method to uniformly disperse the heterogeneous structure nano-carbon material and the pure aluminum powder with a particl...

Embodiment 2

[0032] A method for reinforcing a magnesium-based composite material with a special-shaped structure nano-carbon material, comprising the following steps.

[0033] (1) According to the ratio of 1g:300ml, multi-walled carbon nanotubes with a diameter >200 nm were added to the mixed acid solution of concentrated sulfuric acid and concentrated nitric acid (concentrated sulfuric acid:concentrated nitric acid=1:4).

[0034] (2) Add potassium permanganate to the mixed acid solution containing multi-walled carbon nanotubes in step (a) at a concentration of 0.01g / ml, heat in a water bath at 80°C for 4 hours, wash with deionized water and freeze-dry in vacuum A nano-carbon material with a heterogeneous structure in which the outer tube wall of the multi-walled carbon nanotube is cut is obtained.

[0035] (3) Use the liquid dispersion method to uniformly disperse the heterogeneous structure nano-carbon material and the pure aluminum powder with a particle size >325 mesh at a mass ratio ...

Embodiment 3

[0042]A method for reinforcing a magnesium-based composite material with a special-shaped structure nano-carbon material, comprising the following steps.

[0043] (1) According to the ratio of 1g:600ml, add multi-walled carbon nanotubes with a diameter >200 nm into the mixed acid solution of concentrated sulfuric acid and concentrated nitric acid (concentrated sulfuric acid:concentrated nitric acid=1~4).

[0044] (2) Add potassium permanganate to the mixed acid solution containing multi-walled carbon nanotubes in step (a) at a concentration of 0.1 g / ml, heat in a water bath at 100°C for 6 hours, wash with deionized water and freeze-dry in vacuum A nano-carbon material with a heterogeneous structure in which the outer tube wall of the multi-walled carbon nanotube is cut is obtained.

[0045] (3) Use the liquid dispersion method to uniformly disperse the heterogeneous structure nano-carbon material and the pure aluminum powder with a particle size >325 mesh at a mass ratio of 20...

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Abstract

The invention discloses a method for strengthening magnesium matrix composites through carbon nanomaterials of different type structures. The method comprises the steps that multiwalled carbon nanotubes with the diameter greater than 200 nm are added to mixed acid liquor at the proportion of 1-3g:200-600ml; in the mixed acid liquor, concentrated sulfuric acid:concentrated nitric acid is equal to 1-3:3-6; then, potassium permanganate is added at the proportion of 0.005-0.1 g per milliliter into the mixture; the new mixture is heated in water bath at the temperature of 60-100 DEG C for 2-8 hours; the carbon nanomaterials of different type structures are obtained by cleaning and vacuum freeze drying the new mixture; a liquid state dispersion method is adopted to prepare the carbon nanomaterials of different type structures with prefabricating block green bodies at weight ratio of 5-20 percent; powder particles with the particle size smaller than 10 are obtained by pulverizing the new carbon nanomaterials and added into smelted magnesium alloy solution; and after being smelted, the new material is stirred and dispersed by a machine, and finally, cast. The process of the method is simple; the carbon nanomaterials of different type structures are uniformly dispersed into the magnesium solution to form strong interface bonding; the effect of fine grain is obvious; the mechanical performance of the composites is good; and the method is beneficial to preparing the magnesium matrix composites of excellent performance.

Description

technical field [0001] The invention belongs to the field of metal composite material preparation, in particular to a preparation method of magnesium-based composite material. Background technique [0002] Lightweight structural materials are one of the development trends in the field of materials and have excellent application prospects. There are many ways to reduce weight, such as developing new high-performance light-weight alloys by adjusting the alloy composition, and preparing high-performance light-weight alloy composites by adding excellent reinforcements. Magnesium alloys have been widely concerned due to their light weight, good vibration damping performance, and abundant resources. However, its low strength, poor plasticity and poor corrosion resistance severely restrict its large-scale application in the field of structural materials. Carbon nanotubes (CNTs) and graphene (Graphene, GN) are nano-carbon materials with good thermal and thermal conductivity and ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/10C22C23/00
CPCC22C1/1036C22C23/00
Inventor 袁秋红廖琳周国华祝益强
Owner YICHUN UNIVERSITY