Preparing method for foam metal composite material

A composite material and metal foam technology, which is applied in the field of closed-cell metal foam composite material preparation, can solve the problems of not being suitable for the production of large-scale structural materials, poor wettability of metal substrates, and easy aggregation of carbon nanotubes, etc., to achieve low cost, Enhanced interface bonding, simple and stable process

Inactive Publication Date: 2016-07-20
HEBEI UNIV OF TECH
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Problems solved by technology

Patent CN104911388A discloses a method for preparing carbon nanotube-reinforced metal foam composites. This method adopts the method of in-situ generation of carbon nanotubes to prepare foamed aluminum matrix composites containing carbon nanotubes. During the whole process, propylene and Flammable gases such as hydrogen are very dangerous, and propylene is a toxic gas that is easy to cause harm to the human body
Moreover, this method also belongs to the category of powder metallurgy, and the product size is limited, so it is not suitable for producing large-scale structural materials
So far, the most widely used industrial method for preparing large-sized closed-cell metal foam is the melt foaming method. Due to the fact that carbon nanotubes are easy to agglomerate and have poor wettability with the metal matrix, this method has not yet been used to prepare carbon-containing foams. Report on Nanotube Foam Metal Composites

Method used

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  • Preparing method for foam metal composite material
  • Preparing method for foam metal composite material
  • Preparing method for foam metal composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] 1): The aluminum ingot is cut into aluminum sheets with a thickness of 5mm and a diameter of 10mm by a wire cutting machine, and 10 pieces of aluminum sheets with a total mass of 1060g are used as the aluminum substrate for use.

[0041] 2): the multi-walled carbon nanotube (its quality is 1% of the total mass of the aluminum matrix, ) and aluminum powder (analytical pure) are mixed according to the mass ratio of 1:20, using a 500ml woolen jar, 5mm zirconia grinding balls, the mass ratio of the ball to material is 10:1, and ball milling at a speed of 300r / min on a planetary ball mill The mixture 2h.

[0042] 3): Heat up the resistance furnace to 720°C, preheat the crucible in the resistance furnace for 5 minutes, then lift out the crucible, and evenly spray 50ml of zirconia release agent on the inner wall of the crucible (the concentration is 10g of zirconia per 100ml of water) First add a piece of aluminum flake, then evenly add a layer of mixed powder obtained from ...

Embodiment 2

[0050] 1): A wire cutting machine is used to cut the magnesium ingot into magnesium flakes with a thickness of 10 mm and a diameter of 10 mm, and 8 magnesium flakes with a total mass of 1060 g are taken as magnesium substrates for later use.

[0051] 2): the multi-walled carbon nanotube (its quality is 3% of the total mass of the magnesium matrix, ) and magnesium powder (analytical pure) are mixed according to the mass ratio of 1:5, using a 500ml woolen jar, 3mm zirconia grinding balls, the mass ratio of the ball to material is 20:1, and ball milling at a speed of 500r / min on a planetary ball mill The mixture 0.5h.

[0052] 3): Heat up the resistance furnace to 680°C, preheat the crucible in the resistance furnace for 10 minutes, then lift out the crucible, and evenly spray 50ml of zirconia release agent on the inner wall of the crucible (the concentration is 10g of zirconia per 100ml of water), First add a piece of magnesium flakes, then evenly add a layer of mixed powder o...

Embodiment 3

[0057] 1): Use a wire cutting machine to cut the aluminum ingot into round aluminum sheets with a thickness of 10mm and a diameter of 10mm, and take 5 pieces of aluminum sheets with a total mass of 1060g as the aluminum matrix for use.

[0058] 2): the multi-walled carbon nanotube (its quality is 5% of the total mass of the aluminum matrix, ) and aluminum powder (analytically pure) are mixed according to the mass ratio of 1:10, using a 500ml woolen jar, 10mm zirconia grinding balls, the mass ratio of the ball to material is 5:1, and ball milling at a speed of 200r / min on a planetary ball mill The mixture 5h.

[0059] 3): Heat the resistance furnace to 750°C, preheat the crucible in the resistance furnace for 3 minutes, then lift out the crucible, and evenly spray 50ml of zirconia release agent on the inner wall of the crucible (the concentration is 10g of zirconia per 100ml of water), First add a piece of aluminum flake, then evenly add a layer of mixed powder obtained by ba...

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Abstract

The invention discloses a preparing method for a foam metal composite material. The method includes the following steps that firstly, a metal ingot is cut into metal sheets the same in thickness; carbon nanometer tubes and metal powder with the components the same as those of metal pretreated in the first step are mixed, and the mixture is subjected to ball grinding on a planetary ball grinding machine for 0.5 h-6 h to obtain mixed powder; thirdly, one metal sheet is added to the bottom of a crucible, one layer of mixed powder is then evenly added, the manner of adding one metal sheet and then one layer of mixed powder cyclically is adopted, the topmost part is the corresponding metal sheet, and the crucible is put into a resistance furnace to be smelted; fourthly, a thickening agent is added; fifthly, a foaming agent is added; and sixthly, the crucible is taken out and cooled, and the closed-cell foam metal composite material containing the carbon nanometer tubes is obtained. The carbon nanometer tubes are evenly scattered in the foam metal, and the compression performance and the energy absorbing capability are obviously improved.

Description

technical field [0001] The invention belongs to the field of preparation of foamed metal materials, in particular to a preparation method of closed-cell foamed metal composite materials. Background technique [0002] Closed-cell metal foam is a new type of material with randomly distributed pores in the metal matrix, which has the characteristics of both metal and gas. Because closed-cell foam metal has the characteristics of low density, high specific strength and specific stiffness, excellent energy absorption effect, good sound insulation performance, high electromagnetic shielding performance, strong weather resistance and good recycling performance, it has a wide range of applications in the field of structural materials. Prospects, especially in the fields of high-speed rail, automobile, aerospace and military industry. [0003] With the continuous improvement of people's requirements for environmental protection and comprehensive mechanical properties of structural m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C21/00C22C23/00C22C18/00
CPCC22C1/08C22C18/00C22C21/00C22C23/00C22C26/00C22C2026/002C22C1/083
Inventor 夏兴川张赞王晶赵维民丁俭宋开红邱传荣姜庆费鹏扬
Owner HEBEI UNIV OF TECH
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