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Preparation method of carbon-nanotube-reinforced magnesium-based composite material

A nanotube composite, carbon nanotube technology, applied in the field of alloys containing non-metallic fibers, can solve the problem of poor carbon nanotube-magnesium interface wettability, weak interface bonding, and poor comprehensive mechanical properties of carbon nanotube-reinforced magnesium matrix composites. It can achieve the effect of excellent comprehensive mechanical properties and tight interfacial bonding.

Active Publication Date: 2019-04-23
HEBEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to provide a preparation method of carbon nanotube reinforced magnesium-based composite material, which is to synthesize nano-scale magnesium particles in situ on the surface of carbon nanotubes, thereby obtaining magnesium-coated carbon nanotube composite powder, and then through The method of preparing it into carbon nanotube-reinforced magnesium-based composites by ultrasonic squeeze casting process overcomes the agglomeration of carbon nanotubes existing in the method of preparing carbon nanotube-reinforced magnesium-based composites in the prior art, resulting in carbon nanotubes in the magnesium matrix The dispersion in the medium is not uniform; the preparation process causes structural damage to the carbon nanotubes, which reduces its reinforcing effect; it is difficult to avoid the oxidation of the magnesium matrix to varying degrees; the wettability of the carbon nanotubes-magnesium interface in the composite material is poor, and only a weak Interfacial bonding, which leads to the defect of poor comprehensive mechanical properties of carbon nanotube-reinforced magnesium-based composites

Method used

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  • Preparation method of carbon-nanotube-reinforced magnesium-based composite material

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Embodiment 1

[0045] The first step, preparation of magnesium-coated carbon nanotube composite powder:

[0046] Add 0.4 g of carbon nanotubes into tetrahydrofuran to form a suspension, ensuring that the mass concentration of carbon nanotubes in tetrahydrofuran is 4×10 -3 g / mL, ultrasonically treat the tetrahydrofuran suspension containing carbon nanotubes for 40 min with an ultrasonic disperser, so that the carbon nanotubes are uniformly dispersed in tetrahydrofuran, and then 1.6 g of naphthalene, 5.2 g of lithium powder with a particle size of 55 μm and 35.2 g of anhydrous magnesium chloride solids are sequentially added to the above-mentioned tetrahydrofuran suspension, and the suspension is placed in a high-purity argon glove box filled with a purity of 99.9%. The suspension was stirred for 45 hours at a rotating speed of 45 h, thereby synthesizing magnesium-coated carbon nanotube composite powder in situ in tetrahydrofuran, and then using a microporous filter membrane and absolute ethan...

Embodiment 2

[0056] The first step, preparation of magnesium-coated carbon nanotube composite powder:

[0057] Add 0.01 g of carbon nanotubes to tetrahydrofuran to form a suspension, ensuring that the mass concentration of carbon nanotubes in tetrahydrofuran is 1×10 -4 g / mL, ultrasonically treat the above tetrahydrofuran suspension containing carbon nanotubes for 20 min with an ultrasonic disperser, so that the carbon nanotubes are uniformly dispersed in tetrahydrofuran, and then 4.5 g of naphthalene, 14.6 g of lithium powder with a particle size of 80 μm and 99.0 g of anhydrous magnesium chloride solids are sequentially added to the above-mentioned tetrahydrofuran suspension, and the suspension is placed in a high-purity argon glove box filled with a purity of 99.9%. The suspension was stirred at a speed of 12 hours to in-situ synthesize magnesium-coated carbon nanotube composite powder in tetrahydrofuran, and then use a microporous filter membrane and absolute ethanol to compound the mag...

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Abstract

The invention discloses a preparation method of a carbon-nanotube-reinforced magnesium-based composite material and relates to a non-metal fiber-containing alloy characterized by a matrix material. According to the method, nanometer-sized magnesium particles are synthesized on the surface of a carbon nanotube in situ so as to obtain a magnesium-coated carbon nanotube composite powder; and then themagnesium-coated carbon nanotube composite powder is subjected to an ultrasonic extrusion casting process to form the carbon-nanotube-reinforced magnesium-based composite material. The defects of a method for preparing the carbon-nanotube-reinforced magnesium-based composite material in the prior art that the carbon nanotube agglomeration results in uneven dispersion of the carbon nanotube in a magnesium matrix, the preparation process results in structural damage of the carbon nanotube, consequently, the reinforcing effect is reduced, different degrees of oxidation of the magnesium matrix are difficult to avoid, the carbon nanotube and magnesium interface in the composite material has poor wettability, and only weak interface bonding is formed, so that the carbon-nanotube-reinforced magnesium-based composite material has poor comprehensive mechanical properties are overcome.

Description

technical field [0001] The technical scheme of the invention relates to an alloy containing non-metallic fibers characterized by a matrix material, specifically a method for preparing a carbon nanotube-reinforced magnesium-based composite material. Background technique [0002] In recent years, with the introduction of lightweight manufacturing, traditional alloy materials have been unable to meet the requirements of the development of lightweight manufacturing, so the demand for new light metals with excellent comprehensive properties, such as magnesium and aluminum matrix composites, is increasing. Among them, magnesium-based composite materials inherit the light-weight characteristics of magnesium, and have higher strength, plasticity, high-temperature stability and corrosion resistance than magnesium and magnesium alloys. In addition, magnesium is one of the most abundant elements on earth and is easily recycled. Therefore, magnesium-based composites are considered to b...

Claims

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Application Information

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IPC IPC(8): C22C1/05C22C1/10C22C23/00C22C32/00
CPCC22C1/05C22C23/00C22C26/00C22C32/0084C22C2026/002
Inventor 李海鹏戴西斌赵利新王加义李乐乐纵荣荣
Owner HEBEI UNIV OF TECH
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