Method for preparing through-hole foamed metal of high factor of porosity

A metal foam and high porosity technology, applied in the field of metal foam preparation, can solve the problem of high process cost

Inactive Publication Date: 2008-12-31
INST OF SOLID PHYSICS ACAD SINICA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0015] The characteristic of this method is that the obtained metal foam has almost exactly the same pore structure as

Method used

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  • Method for preparing through-hole foamed metal of high factor of porosity

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Embodiment Construction

[0032] Put polyester foam with a diameter of 100mm and a height of 60mm and a porosity of 95% into the mold, and use materials such as α hemihydrate gypsum, tap water, industrial salt (particle size ≥ 100 mesh), calcium oxide (particle size ≥ 100 mesh) Prepare a uniform slurry according to (mass percentage) 45%: 20%: 30%: 5%, then inject the slurry into polyester foam and dry it naturally for 3 hours, then dry it at 55°C for 2 hours, and then dry it at 120°C respectively. °C, 260 °C and 550 °C for 3 hours each to burn off the polyester foam to form a porous skeleton. Put the porous skeleton into a mold, pour aluminum liquid at about 700°C on it, then infiltrate the aluminum liquid into the gaps of the porous skeleton at 1 to 2 atmospheres, and finally wash with water to remove gypsum and other materials, that is A through-cell aluminum foam with a porosity of 95% is available.

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Abstract

The invention discloses a process for preparing high porosity through hole foamed metal, which is characterized in that: the process selects a material with a foam structure as a parent material, the parent material is provided with three-dimensional through holes which are then filled with powdery slurries dissolvable in water or other solvents, the slurries are dried and hardened to form a prefabricated model, then the parent material is gasified and decomposed after calcinations, then the prefabricated model is positioned in a mold and poured with liquid metal, the liquid metal is filled in the holes of the prefabricated model, powder materials in a forming block are dissolved and removed after cooling, thereby the foamed metal of three-dimensional network through holes is obtained. The foamed aluminum gained in the invention has a three-dimensional network structure with holes communicated with one another, and the porosity and aperture can be adjusted in the range of between 80 percent and 98 percent and between 0.5 and 5mm respectively.

Description

technical field [0001] The invention relates to a method for preparing foam metal. The metal foam matrix is ​​aluminum or aluminum alloy, the pore structure is a three-dimensional network through-hole structure, the pore diameter is 0.5-5.0mm, and the porosity is 80-98%. Background technique [0002] Aluminum foam is a new multi-functional material that has developed rapidly in recent years. Due to the extremely high porosity and metal characteristics, it has excellent properties such as wave absorption, shock absorption, filtration, heat transfer, and buffering, and has broad application prospects in the fields of environmental protection, energy, machinery, chemicals, transportation, aerospace, etc. , thus attracting widespread attention from academia and industry. Its typical applications include sound-absorbing and noise-reducing structures for high-speed trains and automobiles, sound-absorbing barriers for urban elevated highways, acoustic environment treatment in lar...

Claims

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Application Information

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IPC IPC(8): C22C1/08
Inventor 王新福王幸福韩福生
Owner INST OF SOLID PHYSICS ACAD SINICA
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