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Preparation method for synthesizing carbon nanotube reinforced foam aluminum composite material based on rapid foaming method

A technology of aluminum composite materials and reinforced foam, which is applied in metal processing equipment, transportation and packaging, etc., to achieve the effect of simple process, high production efficiency and controllable production

Inactive Publication Date: 2019-01-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few studies on this method at present, and they are limited to the influence of some traditional reinforcing phases (such as SiC, etc.) and alloying elements (Si, Mg, etc.) on the foaming process.

Method used

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  • Preparation method for synthesizing carbon nanotube reinforced foam aluminum composite material based on rapid foaming method
  • Preparation method for synthesizing carbon nanotube reinforced foam aluminum composite material based on rapid foaming method
  • Preparation method for synthesizing carbon nanotube reinforced foam aluminum composite material based on rapid foaming method

Examples

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preparation example Construction

[0021] 2) Preparation of CNT / Al composite powder: put 10-30g of precursor powder into a corundum ark placed in a tube furnace, heat it to 250°C under an argon (120-400ml / min) atmosphere, and then heat it under hydrogen (150ml / min) -250ml / min) atmosphere heated to 450°C, reduced for 2-4h, then heated to 600°C under argon for 10-120min of chemical vapor deposition, the atmosphere conditions are acetylene and argon (10-30ml / min, 150 -250ml / min), obtain CNT / Al composite powder;

[0022] 3) Preparation of foaming precursor: mix the CNT / Al composite powder obtained above with 7wt.% Si powder and 0.3wt.% TiH 2 Mix the powder in a three-dimensional mixer for 0.5-3 hours to obtain a uniform mixed powder, then weigh 24g of powder and use a cold press to hold the pressure at 450MPa for 5 minutes to obtain Φ38×8mm 3 The foamed precursor of the cylinder;

[0023] 4) Preparation of foamed aluminum: Preheat the Φ38 cylindrical mold in a foaming furnace for 20-60 minutes to 740°C, then plac...

example 1

[0026] Pure aluminum powder with 7wt.% Si powder and 0.3wt.% TiH 2 Mix the powder in a three-dimensional mixer for 2 hours to obtain a uniform mixed powder, then weigh 24g of powder and use a cold press to hold the pressure at 450MPa for 5 minutes to obtain Φ38×8mm 3 The foaming precursor of the cylinder; preheat the Φ38 cylinder mold in the foaming furnace for 40min to 740°C, then place the foaming precursor in the mold for 90s and take it out, and quickly water-cool the mold to obtain a nearly cylinder Shaped samples, then wire cut to get 20×20×20mm 3 samples, such as image 3 a and 3e, the average pore diameter is 2.29mm, and the porosity is 78.1%.

example 2

[0028] 19.9g of pure aluminum powder and 0.4949g of Co(NO 3 ) 2 ·6H 2 O was ultrasonicated in 150ml of absolute ethanol solution for 30min, then stirred and heated in a water bath at 60°C, after 4h, the alcohol was evaporated to dryness, and then dried in an oven for 8h to obtain the precursor powder; put 20g of the precursor powder into the In the corundum ark of the tube furnace, heated to 250°C under argon (300ml / min) atmosphere, then heated to 450°C under hydrogen (250ml / min) atmosphere, reduced for 2.5h, and then heated to Carry out chemical vapor deposition at 600 ℃ for 10min, the atmosphere condition is acetylene and argon (20ml / min, 240ml / min), obtain 0.5wt.%CNT / Al composite powder; Si powder and 0.3wt.% TiH 2 Mix the powder in a three-dimensional mixer for 1 hour to obtain a uniform mixed powder, then weigh 24g of the powder and use a cold press to hold the pressure at 450MPa for 5 minutes to obtain Φ38×8mm 3 The foaming precursor of the cylinder; preheat the Φ38 ...

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Abstract

The invention relates to a preparation method for synthesizing a carbon nanotube reinforced foam aluminum composite material based on a rapid foaming method. The preparation method comprises the following steps that (1) preparation of a catalyst precursor is carried out, particularly, pure aluminum powder and CO (NO3) 26H2O are weighed according to a mass ratio of 18-22:1, a proper amount of anhydrous ethanol solution is added, and precursor powder is obtained after drying; (2) preparation of CNT / Al composite powder is carried out; (3) preparation of foaming precursor is carried out, particularly, the CNT / Al composite powder obtained above is mixed with 7wt.% of Si powder and 0.3wt.% of TiH2 powder in a three-dimensional mixer for 0.5 to 3 hours to obtain uniform mixed powder, and a cold press is used for maintaining pressure at 450 MPa to obtain the foaming precursor; and (4) preparation of foamed aluminum is carried out.

Description

technical field [0001] The invention belongs to the field of composite materials, and in particular relates to a research on preparing carbon nanotube-reinforced foamed aluminum composite materials by using a rapid powder metallurgy foaming method. Background technique [0002] As a typical structural and functional integration material, aluminum foam material is widely used in aerospace, automotive industry and other fields. The literature shows that the performance of aluminum foam has a great relationship with its pore structure, including pore size, pore distribution uniformity and porosity. Therefore, in order to broaden the application field and scope of aluminum foam, some ceramic phases are introduced into the aluminum foam matrix as a reinforcing phase to improve the pore structure and improve its performance. Although the performance of aluminum foam has been improved to a certain extent, the material is relatively brittle. Therefore, finding a suitable reinforc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11B22F1/02C22C1/08C22C21/00
CPCC22C21/00C22C26/00B22F3/1125B22F3/1134C22C2026/002B22F1/16
Inventor 赵乃勤马有草杨旭东许佳丽沙军威何春年
Owner TIANJIN UNIV
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