Method for preparing carbon nanotube reinforced magnesium-based composites of layered structure

A carbon nanotube and composite material technology, which is applied in coatings, electrolytic coatings, electrophoretic plating, etc., can solve the problem that the strength and plasticity of pure magnesium matrix cannot be balanced, and achieve the effects of improving mechanical properties, increasing strength and simple process.

Inactive Publication Date: 2018-06-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a carbon nanotube reinforced magnesium-based composite material with a layered structure, to solve the problem that the strength and plasticity of the pure magnesium matrix cannot be balanced; compared with the pure magnesium matrix, the mechanical properties of the material according to the present invention The performance has been greatly improved, and the elongation of the material can be maintained while increasing the strength

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  • Method for preparing carbon nanotube reinforced magnesium-based composites of layered structure
  • Method for preparing carbon nanotube reinforced magnesium-based composites of layered structure
  • Method for preparing carbon nanotube reinforced magnesium-based composites of layered structure

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specific Embodiment approach 1

[0022] Embodiment 1: A method for preparing a carbon nanotube-reinforced magnesium-based composite material with a layered structure in this embodiment is completed by the following steps:

[0023] Step 1. Grind the magnesium foil with 2000# sandpaper on the pre-grinder, remove the oxide on the surface of the magnesium foil as the cathode, use the stainless steel plate as the anode, immerse the cathode and the anode in the electrophoretic solution together, and conduct the process under a constant voltage of 20V. Electrophoretic deposition for 90s, carbon nanotubes adsorb Al during electrophoretic deposition 3+ Afterwards, it bears a positive charge, moves towards the magnesium foil under the action of an electric field, and then deposits on the magnesium foil, and then puts it in a vacuum drying oven and dries it at 80°C to obtain a carbon nanotube / magnesium layered unit ;

[0024] Step 2. Stack 50 carbon nanotubes / magnesium layered elements obtained in step 1 layer by layer...

specific Embodiment approach 2

[0033] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in Step 2, vacuum hot pressing is sintered at 500° C. and a pressure of 55 MPa, and the sintering time is 7 hours. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0034] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 is that in step 2, vacuum hot-pressing sintering is carried out at 630° C. and a pressure of 30 MPa, and the sintering time is 5 hours. Other steps and parameters are the same as in the first embodiment.

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Abstract

The invention provides a method for preparing carbon nanotube reinforced magnesium-based composites of a layered structure, and belongs to the technical field of magnesium-based composites. The problem that the strength and plasticity of pure magnesium matrix can not be considered simultaneously is solved. According to the method provided by the invention, the elongation of materials is maintainedto a certain extent while the strength is improved. The method provided by the invention comprises the step 1 of taking a magnesium foil of which the surface oxides are removed as a cathode, a stainless steel plate as an anode, immersing the cathode and the anode into electrophoretic liquid for electrophoretic deposition, and then drying the magnesium foil and the stainless steel plate to obtaincarbon nanotube/magnesium layered elements; the step 2 of stacking the carbon nanotube/magnesium layered elements obtained in the step 1, and then performing vacuum hot-pressing sintering to obtain the carbon nanotube reinforced magnesium-based composites of the layered structure. The carbon nanotube reinforced magnesium-based composites prepared with the method provided by the invention are applied to aerospace.

Description

technical field [0001] The invention belongs to the technical field of magnesium-based composite materials; in particular, it relates to a method for preparing a carbon nanotube-reinforced magnesium-based composite material with a layered structure. Background technique [0002] With the development of science and technology and the progress of industry, higher requirements are put forward for materials. In addition to meeting the basic needs, it must also have excellent comprehensive performance. [0003] As the lightest structural material, magnesium has high specific strength and specific stiffness, and is widely used in aerospace. The strength of carbon nanotubes is as high as 3Tpa, but at the same time, it has the characteristics of low density and light weight. It is an ideal metal material reinforcement. [0004] However, pure magnesium has low strength and poor plasticity, and when the strength is increased, the plasticity will often be greatly reduced. Contents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C23/00C25D13/02
CPCC22C1/05C22C23/00C22C2026/002C25D13/02
Inventor 王晓军向烨阳孟令龙施海龙胡小石吴昆
Owner HARBIN INST OF TECH
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