Carbon nano tube reinforced metal matrix composite material and in-situ preparation method thereof

A technology of carbon nanotubes and composite materials, which is applied in the field of preparation of composite materials technology, can solve the problems affecting the shape, size and distribution of nano-carbon reinforcements, the size of catalyst particles is not concentrated, and the process is complicated, and the shape is controllable. , the effect of suppressing growth and reunion, and simple operation

Inactive Publication Date: 2011-04-06
SHANGHAI JIAO TONG UNIV
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Subsequently, these three technologies all used the powder metallurgy method to make the obtained composite powder into a bulk composite material, which solved the problem of nano-carbon dispersion in the metal matrix composite material, but there are still major deficiencies: (1 ) The first technique has mild reaction conditions, but the process of preparing the catalyst is complex and poorly controllable, so the size of the obtained catalyst particles is not concentrated and unevenly distributed, which affects the shape, size and distribution of the final nano-carbon reinforcement; (2) The latter two technologies are carried out in high-temperature and high-pressure liquid media, even in supercritical fluids. The reaction conditions are harsh, and the obtained nano-carbon reinforcements are mostly amorphous and have many by-products.

Method used

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  • Carbon nano tube reinforced metal matrix composite material and in-situ preparation method thereof
  • Carbon nano tube reinforced metal matrix composite material and in-situ preparation method thereof
  • Carbon nano tube reinforced metal matrix composite material and in-situ preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1: 1.0g Fe (NO 3 ) 39H 2 O, 1.7g of glucose and 2.0g of polyvinyl alcohol were dissolved in 20ml of ethanol, magnetically stirred for 0.5h to obtain a uniform precursor solution, then 10g of aluminum powder was added to the precursor solution, magnetically stirred for 1.0h, and evenly distributed on the surface of the aluminum powder Coating the catalyst precursor and polyvinyl alcohol, and filtering and drying to obtain surface-coated aluminum powder. Then put the powder into N 2 Heating to 500° C. for 2 hours in a tube furnace under atmosphere protection to obtain carbon nanotube-reinforced aluminum matrix composite powder. Scanning electron microscope observations showed that a large number of carbon nanotubes were formed in situ, such as figure 2 shown. Transmission electron microscopy observations show that the in situ generated carbon nanotubes have a perfect graphitic structure, such as image 3 shown.

Embodiment 2

[0033] Embodiment 2: 0.6gNiCl 2 ·6H 2 O, 2.0g of citric acid and 2.0g of polyethylene glycol were dissolved in 20ml of pure water, magnetically stirred for 0.5h to obtain a uniform precursor solution, then 20g of iron powder was added to the precursor solution, magnetically stirred for 1.0h, The surface of the powder is uniformly coated with the catalyst precursor and polyethylene glycol, and the surface-coated iron powder is obtained through filtration and drying. Then put the powder into N 2 Heating to 800° C. for 1 hour in a tube furnace under atmosphere protection to obtain carbon nanotube-reinforced iron-based composite powder.

Embodiment 3

[0034] Example 3: Dissolve 0.5g ferrocene, 1.5g maltose and 2.0g ethylene glycol in 20ml ethanol, stir magnetically for 0.5h to obtain a uniform precursor solution, then add 23g copper powder to the precursor solution, magnetically Stir for 1.0 h, evenly coat the catalyst precursor and ethylene glycol on the surface of the copper powder, and filter and dry to obtain the surface-coated copper powder powder. Then put the powder into a tube furnace protected by an Ar atmosphere and heat it to 700° C. for 1.5 hours to react to obtain a carbon nanotube-reinforced copper-based composite powder.

[0035] Table 1. Process conditions of some embodiments

[0036]

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Abstract

The invention discloses a carbon nano tube reinforced metal matrix composite material and an in-situ preparation method thereof in the technical field of composite materials. The in-situ preparation method comprises the following steps of: firstly, coating a carbon source substance and a catalyst precursor on the surface of metal powder; secondly, generating carbon nano tubes in situ on the surface of the metal powder on the basis of a catalytic pyrolytic reaction to obtain composite powder of the carbon nano tubes and a metal; and finally, performing densification by adopting a powder metallurgy technique to obtain the carbon nano tube reinforced metal matrix composite material. In the preparation method, tiny and dispersed catalyst particles are generated in situ by bringing the steric effect of the carbon source substances such as an organic substance or a polymer and the like, and then uniformly dispersed carbon nano tubes are generated in situ on the surface of the metal powder through the catalytic pyrolytic reaction of the organic substance or the polymer.

Description

technical field [0001] The invention relates to a preparation method in the technical field of composite materials, in particular to a carbon nanotube reinforced metal matrix composite material and an in-situ preparation method thereof. Background technique [0002] Carbon nanotubes have attracted extensive attention from researchers in many disciplines due to their excellent mechanical properties and physical properties. Carbon nanotube-reinforced metal matrix composites, which use carbon nanotubes as reinforcements, can not only be used as lightweight and high-strength structural materials, but also It can also be used as a functional material for electrical conduction, heat conduction, wear resistance, and vibration reduction, so it has become a hot spot in research and development in the field of materials in recent years. However, due to the strong van der Waals force between carbon nanotubes, it is easy to agglomerate, which makes it difficult for carbon nanotubes to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C47/14C22C49/14C22C101/10
Inventor 李志强曹霖霖江林范根莲张荻
Owner SHANGHAI JIAO TONG UNIV
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