Smelting process of carbon nanotube reinforced aluminum matrix composite

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...

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 and cannot be processed directly. Effective addition and dispersion; the large property difference between carbon nanotubes and aluminum liquid leads to infiltration difficulties, and the interface between the two is weak; high melting temperature leads to serious chemical reactions between carbon nanotubes and aluminum

However, the electroless plating method is usually inefficient and the waste liquid treatment is difficult. There is an urgent need for a simple and efficient composite material preparation process suitable for mass scale-up production

Images