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Method for preparing foam metal through freeze drawing technology

A foam metal and process technology, applied in the field of new metal material preparation, can solve the problems of complex preparation process, high energy consumption, low efficiency, etc., and achieve the effects of large internal surface area, high porosity, and reduced production cost

Active Publication Date: 2018-01-09
YUHUAN DEGU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of complex metal foam preparation process, high energy consumption, and low efficiency in the existing metal foam, the present invention proposes a method for preparing metal foam by adopting a freezing drawing process, which mixes metal powder, short metal fibers, thickener and water to produce The viscous metal paste is obtained, then sprayed, and quickly frozen to form a fluffy foam, which is heated to sublimate the ice directly and removed, and the metal powder and short metal fibers are bonded by the thickener to form a metal foam body. Foam metal is obtained after fast burning and solidification

Method used

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  • Method for preparing foam metal through freeze drawing technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of method that adopts frozen drawing process to prepare foamed metal, its concrete process of preparing foamed metal is as follows:

[0025] Mix 3.5 kg of metal aluminum powder with a particle size of 50-100 μm, 0.35 kg of polyacrylamide, and 10 kg of water, and place it in a container, then add 1.5 kg of metal aluminum short fibers with a length of 0.3-0.5 mm, and continue stirring for 22 minutes. Take out the stirrer to form a viscous fluid with a viscosity of 2000cp, and deposit the viscous fluid pressurized spinneret in a mold cooled by liquid nitrogen to form a medium and fluffy foam; then place it in a box-type resistance furnace and heat up to Sinter at 80°C lower than the melting point, keep warm for 20 minutes, and cool with the furnace to obtain porous metal foam.

[0026] To the porous metal foam that embodiment 1 obtains, test its porosity and internal surface area, the data obtained are as shown in table 1;

[0027] For the porous metal foam obtaine...

Embodiment 2

[0029] A kind of method that adopts frozen drawing process to prepare foamed metal, its concrete process of preparing foamed metal is as follows:

[0030] Mix 3.2 kg of metal nickel powder with a particle size of 50-100 μm, 0.30 kg of gelatinized starch, and 10 kg of water, and place it in a container, then add 1.7 kg of metal nickel short fibers with a length of 0.3-0.5 mm, continue stirring for 20 minutes, and take out Stirrer, forming a viscous fluid with a viscosity of 3000cp, depositing the viscous fluid pressurized spinneret in a mold cooled by liquid nitrogen to form a medium and fluffy foam; then place it in a box-type resistance furnace and heat up to a low temperature Carry out sintering at the melting point of 100°C, keep warm for 20 minutes, and cool with the furnace to obtain porous metal foam.

[0031] To the porous metal foam that embodiment 2 obtains, test its porosity and internal surface area, the data obtained are as shown in table 1;

[0032] For the porou...

Embodiment 3

[0034] A kind of method that adopts frozen drawing process to prepare foamed metal, its concrete process of preparing foamed metal is as follows:

[0035] Mix 3.7kg of metal copper powder with a particle size of 50-100μm, 0.32kg of xanthan gum and 10kg of water, put them in a container, then add 1.8kg of metal copper short fibers with a length of 0.3-0.5mm, and continue stirring for 25 minutes. Take out the stirrer to form a viscous fluid with a viscosity of 2500cp, and deposit the viscous fluid pressurized spinneret in a mold cooled by liquid nitrogen to form a medium and fluffy foam; then place it in a box-type resistance furnace and heat up to Sinter at 60°C lower than the melting point, keep warm for 10 minutes, and cool with the furnace to obtain porous metal foam.

[0036]The porous metal foam that embodiment 3 obtains, tests its porosity and inner surface area, and the data obtained are as shown in table 1;

[0037] For the porous metal foam obtained in Example 3, comp...

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Abstract

The invention belongs to the technical field of preparation of novel metal materials, and provides a method for preparing foam metal through the freeze drawing technology. The method comprises the steps that metal powder, broken-staple metal fibers, a thickening agent and water are mixed and stirred to prepare thick metal slurry, jetting is carried out, raid freezing is carried out, a fluffy foambody is formed, heating is carried out to directly sublimate ice for removal, the metal powder and the broken-staple metal fibers form a metal foam base body under adhesion of the thickening agent, and the meal foam base body is subjected to fast firing and solidification to form foam metal. Compared with a traditional method, the porous foam metal prepared through the method is high in porosity and large in internal surface area of unit volume, material mechanics properties are improved through the broken-staple metal fibers, and meanwhile the method is simple in production process, low in cost, environmentally friendly and suitable for large-scale popularization.

Description

technical field [0001] The invention belongs to the technical field of preparation of new metal materials, and provides a method for preparing foam metal by adopting a freezing wire drawing process. Background technique [0002] Porous metal foam is a functional material developed in recent decades. There is no uniformity in its concept or classification in the academic circles, but basically there are the following definitions: porous metal foam is a metal matrix containing a certain amount and a certain size Metal materials with pore diameter and certain porosity. In summary, there are mainly the following classification methods: (1) According to the size of pore diameter and porosity, it is divided into two categories, porous metal and foam metal, with a pore diameter of less than 0.13mm and a porosity of 45%~ 90% is called porous metal (porous metal); and the pore size is 0.15 ~ 6mm, the porosity is greater than 90%, called foam metal (foam metal); (2) Classified accordi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/11B22F1/00
Inventor 陈庆昝航
Owner YUHUAN DEGU NEW MATERIAL TECH CO LTD
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