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Foam metal and preparation method thereof

A metal foam and molten metal technology, which is applied in the field of metal foam and the preparation of metal foam, can solve the problems of high production cost, environmental pollution, porosity limitation, etc., and achieve the advantages of light specific gravity, good sound absorption effect, saving materials and costs Effect

Inactive Publication Date: 2008-02-06
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (3) Low rigidity
[0029] The above two methods have limited porosity due to the production process, so the production cost is high and the environment is polluted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1. First, melt the aluminum alloy in a mold, then add granular silicon carbide or aluminum oxide into the aluminum alloy liquid and stir evenly. The volume percentage of the silicon carbide or aluminum oxide particles in the aluminum alloy liquid is 10% to 10%. 20%, the particle size is 5-20 μm, and then blow nitrogen into the aluminum alloy liquid to form bubbles, stir to make the bubbles evenly distributed, take the semi-solid aluminum alloy out of the mold, and after cooling to room temperature, the surface of the obtained product A layer of aluminum fiber wire is bonded between the pores. Then soak it in the paint solution and take it out to dry.

[0047] The aluminum alloy consists of 75% by weight of aluminum, SiO 2 5%, Zn 17%, CuO 2.999%, Re 0.001% composition.

Embodiment 2

[0048]Embodiment 2, first melt aluminum in the mold, then add granular silicon carbide or aluminum oxide into the aluminum liquid and stir evenly, the volume percentage of silicon carbide or aluminum oxide particles in the aluminum liquid is 10% to 20%, The particle size is 5-20 μm, then blow nitrogen gas into the molten aluminum to form bubbles, stir to make the bubbles evenly distributed, take out the semi-solid aluminum from the mold, cool to room temperature, and bond a hole between the pores on the surface of the obtained product layer of aluminum fiber wire. Then soak it in the paint solution and take it out to dry.

Embodiment 3

[0049] Embodiment 3, preparation method is identical with embodiment 1, and the content by weight of aluminum alloy is by aluminum 85%, SiO 2 13%, Zn 2%, CuO 0.99%, Re 0.01%.

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PUM

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Abstract

The present invention discloses a foamed metal and is characterized in that air holes are distributed in the metallic material. The diameter of the air hole is 3-25 millimeters and the porosity is 80-98 percent. The invention also discloses a method of preparing foamed metal. The foamed metal in the present invention has a good sound-absorbing effect and can be used for making sound absorption boards.

Description

technical field [0001] The invention relates to a metal foam and a method for preparing the metal foam. Background technique [0002] Noise pollution is one of the three major environmental pollutions in the world today, which seriously endangers human health. Among them, the problem of traffic noise is more prominent, such as urban subway light rail, highway elevated and other places, which have a greater impact on the surrounding environment and are more difficult to solve. At present, the main solution is to use sound-absorbing materials for sound-absorbing and noise-reducing treatment. Traditional sound barriers are generally made of glass wool, but glass wool is easily hardened by moisture due to the ingress of rainwater, and its lifespan is short. According to the actual observation of some road sections in Shanghai, the lifespan of traditional sound barriers is only 2-3 years; even if it is wrapped with imported film materials, it can only last 5-6 years. In the ea...

Claims

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Application Information

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IPC IPC(8): C22C1/08C22C21/00
Inventor 严彪王军唐人剑张亚萍朱军宋焕成杜春风付丞寅
Owner TONGJI UNIV
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