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A method for reinforcing magnesium-based composites with three-dimensional scale nano-carbon materials

A nano-carbon material and composite material technology, which is applied in the field of metal composite material preparation, can solve the problems of poor bonding of CNT/Graphene interface and non-uniform dispersion of CNT/Graphene, and achieve obvious grain refinement effect, excellent performance, and process low cost effect

Inactive Publication Date: 2018-08-17
YICHUN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there has been no breakthrough in the research on CNT or Graphene reinforced magnesium matrix composites. The reasons are mainly concentrated in the following two aspects: one is that CNT / Graphene cannot be uniformly dispersed in the magnesium matrix; Poor interfacial binding of Graphene to magnesium matrix

Method used

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  • A method for reinforcing magnesium-based composites with three-dimensional scale nano-carbon materials
  • A method for reinforcing magnesium-based composites with three-dimensional scale nano-carbon materials
  • A method for reinforcing magnesium-based composites with three-dimensional scale nano-carbon materials

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Experimental program
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Effect test

Embodiment 1

[0022] (1) Add carbon nanotubes and graphene oxide to 1000ml and 300ml ethanol, respectively, and disperse ultrasonically for 1 hour to obtain 3mg / ml carbon nanotube solution and 1mg / ml graphene oxide solution, respectively.

[0023] (2) Pour the carbon nanotube solution obtained in step (1) into the U-shaped tube from the opening at one end of the U-shaped tube, and pour the graphene oxide solution into the U-shaped tube from the opening at the other end to obtain carbon nanotubes / Graphene oxide solution.

[0024] (3) The solution obtained in step (2) was subjected to electrophoresis treatment for 1 h with a DC voltage of 50 V to obtain a CNT-GO solution containing a three-dimensional scale structure.

[0025] (4) Add 96.7g of AZ91 magnesium alloy powder with particle size≦325 mesh into ethanol, and perform mechanical stirring after it is completely submerged to obtain magnesium powder or magnesium alloy powder slurry.

[0026] (5) Gradually add the CNT-GO solution obtained...

Embodiment 2

[0031] (1) Add carbon nanotubes and graphene oxide to 1000ml and 1000ml ethanol respectively, and ultrasonically disperse for 2 hours to obtain 3mg / ml carbon nanotube solution and 0.5mg / ml graphene oxide solution respectively.

[0032] (2) Pour the carbon nanotube solution obtained in step (1) into the U-shaped tube from the opening at one end of the U-shaped tube, and pour the graphene oxide solution into the U-shaped tube from the opening at the other end to obtain carbon nanotubes / Graphene oxide solution.

[0033] (3) The solution obtained in step (2) was subjected to electrophoresis treatment for 1 h with a DC voltage of 100 V to obtain a CNT-GO solution containing a three-dimensional scale structure.

[0034] (4) Add 96.5g of AZ91 magnesium alloy powder with particle size≦325 mesh into ethanol, and perform mechanical stirring after it is completely submerged to obtain magnesium powder or magnesium alloy powder slurry.

[0035] (5) Gradually add the CNT-GO solution obtai...

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Abstract

The invention provides a method for reinforcing a magnesium matrix composite by using a three-dimensional scale carbon nanomaterial. The method comprises the following steps that carbon nano tubes and graphene oxide are added into ethanol correspondingly and are subjected to ultrasonic treatment to obtain dispersion liquid of 0.1-3mg / ml and dispersion liquid of 0.1-1mg / ml correspondingly; the two solutions are added into a U-shaped tube simultaneously and are subjected to electrophoresis treatment to obtain the three-dimensional scale carbon nanomaterial (CNT-GO); magnesium or magnesium alloy powder is added into methanol to obtain magnesium powder slurry; a CNT-GO solution is added into the magnesium powder slurry and stirred to obtain CNT-GO / magnesium powder mixed slurry, and the CNT-GO / magnesium powder mixed slurry is subjected to filtering, vacuum drying and cold pressing to obtain a composite green body; the composite green body is subjected to sintering at 550-650 DEG C under argon protection and hot extrusion molding to obtain the CNT-GO / magnesium matrix composite. The method is low in process cost, easy to operate, safe and reliable. The three-dimensional scale carbon nanomaterial is uniformly distributed in a magnesium matrix. The interface bonding strength is high. The grain refinement effect is obvious. The composite has excellent performance.

Description

technical field [0001] The invention belongs to the field of metal composite material preparation, in particular to a method for magnesium-based composite materials. Background technique [0002] Magnesium-based composite materials have the advantages of high specific strength, high specific stiffness, and good wear resistance, and are widely used in the fields of automobiles, aerospace, and electronic products. Carbon nanotubes (carbon nanotube, CNT) and graphene (Graphene) have been considered as excellent magnesium alloys since their discovery due to their superior comprehensive mechanical properties (elastic modulus up to TPa level, strength about 100 times that of steel). enhancement phase. Adding CNT or Graphene into the metal matrix in an attempt to obtain high-performance metal matrix composites has attracted extensive attention from material researchers. However, so far, there has been no breakthrough in the research on CNT or Graphene reinforced magnesium matrix ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C32/00C22C26/00C22C1/05C22C1/10
CPCC22C1/05C22C23/00C22C32/0084C22C2026/002
Inventor 袁秋红廖琳周国华
Owner YICHUN UNIVERSITY