Smelting process of carbon nanotube reinforced aluminum matrix composite

A technology of carbon nanotubes and reinforced aluminum base, which is applied in the field of aluminum alloy preparation, can solve the problems of weak interface bonding, serious chemical reaction, and floating of carbon nanotubes, and achieve the effect of improving surface tension, high product strength, and eliminating oxide film

Active Publication Date: 2021-03-16
WUHAN NANRUI ELECTRIC POWER ENG TECH EQUIP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, in the existing research, most of the powder metallurgy methods are used to prepare aluminum matrix composites, mainly because carbon nanotubes are easier to be dispersed by high-energy ball milling, and research reports on the melting method are relatively rare
Smelting is a very effective processing method. The aluminum alloy matrix is ​​in a molten state and mixed with carbon nanotubes to form a new composite material. However, there are still many problems in the existing smelting process: the untreated carbon nanotubes float up a...

Method used

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  • Smelting process of carbon nanotube reinforced aluminum matrix composite
  • Smelting process of carbon nanotube reinforced aluminum matrix composite

Examples

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Embodiment 1

[0022] Example 1, see Figure 1 to Figure 2 :

[0023] The invention provides a smelting process of a carbon nanotube reinforced aluminum matrix composite material, comprising the following steps:

[0024] (1) Weigh a certain amount of 50g K 3 AlF 6 , 50g of carbon nanotubes, and 400g of aluminum powder were mixed and dispersed by ball milling in a planetary ball mill for 5 hours, the ball milling medium was agate balls, and the rotating speed was 400r / min to obtain a carbon nanotube-aluminum mixed powder with a mass fraction of carbon nanotubes of 10wt.%. ;

[0025] (2) Put the mixed powder in the mold and cold-press molding under 200MPa pressure to make a prefabricated block of φ60mm×20mm, and obtain a carbon nanotube-aluminum prefabricated block;

[0026] (3) Press the carbon nanotube-aluminum prefabricated block into the molten aluminum through a bell jar, and at the same time, slowly stir the aluminum melt (60r / min), heat-preserve and smelt at 700°C for 10min, so that...

Embodiment 2

[0029] The invention provides a smelting process of a carbon nanotube reinforced aluminum matrix composite material, comprising the following steps:

[0030] (1) Weigh a certain amount of 50g Na 3 AlF 6 , 50g of carbon nanotubes, and 400g of aluminum powder were mixed and dispersed by ball milling in a planetary ball mill for 5 hours, the ball milling medium was agate balls, and the rotating speed was 400r / min to obtain a carbon nanotube-aluminum mixed powder with a mass fraction of carbon nanotubes of 10wt.%. ;

[0031] (2) Put the mixed powder in the mold and cold-press molding under 200MPa pressure to make a prefabricated block of φ60mm×40mm, and obtain a carbon nanotube-aluminum prefabricated block;

[0032] (3) Press the carbon nanotube-aluminum prefabricated block into the molten aluminum through a bell jar, and at the same time, slowly stir the aluminum melt (60r / min), heat-preserve and smelt at 750°C for 10min, so that the prefabricated block dissolves and enters the...

Embodiment 3

[0034] The present invention provides a smelting process of carbon nanotube reinforced aluminum-based composite material, which is basically the same as in Example 1, except that the smelting aid is KBF 4 .

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Abstract

The invention provides a smelting process of a carbon nanotube reinforced aluminum matrix composite. The smelting process comprises the following steps: carrying out ball-milling mixing dispersing ona smelting assistant, a carbon nanotube and aluminum/aluminum alloy powder in a planetary ball mill to obtain mixed powder; putting the mixed powder into a mold for cold pressing to obtain a carbon nanotube-aluminum/aluminum alloy precast block; and pressing the carbon nanotube-aluminum/aluminum alloy precast block into molten aluminum through a bell jar, carrying out smelting under stirring, carrying out standing, and then carrying out casting molding, wherein the smelting assistant is any one of potassium boroaluminate (KBF4), potassium titanium fluoroaluminate (K2TiF6), potassium fluoroaluminate (K3AlF6) or sodium fluoroaluminate (Na3AlF6). According to the smelting process of the carbon nanotube reinforced aluminum matrix composite, the carbon nanotube reinforced aluminum matrix composite is prepared through the smelting process, the efficient dispersion of the carbon nanotube in the smelting process is realized, meanwhile, traditional metal smelting equipment can be used, and thusthe smelting process has the advantages of being simple, small in investment, high in product strength and the like and is suitable for industrial mass production.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy preparation, in particular to a smelting process of a carbon nanotube reinforced aluminum matrix composite material. Background technique [0002] Because carbon nanotubes have excellent physical and chemical properties, mechanical properties and stable structure, they are considered to be one of the most suitable reinforcements for composite materials. By dispersing carbon nanotubes in an aluminum or aluminum alloy matrix, a carbon nanotube-reinforced aluminum matrix composite material with high specific strength and high specific modulus is prepared, which has great application value in aerospace, automobile manufacturing, and power grids. Generally, in the existing research, most of the powder metallurgy methods are used to prepare aluminum matrix composites, mainly because the carbon nanotubes are more easily dispersed by high-energy ball milling, while the research reports on the smelt...

Claims

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Application Information

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IPC IPC(8): C22C1/10C22C1/06C22C21/00
CPCC22C1/1036C22C1/1015C22C1/06C22C21/00C22C26/00C22C2026/002C22C1/1047
Inventor 蔡炜何卫王利民闻集群李辛庚宗立君汤超吴昊卢才璇陈胜男
Owner WUHAN NANRUI ELECTRIC POWER ENG TECH EQUIP
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