Preparation method of pore-opening foamy copper having controllable porosity and pore diameter

An open-cell foam and porosity technology, applied in the field of metal manufacturing, can solve problems such as affecting material properties and applications, increasing the complexity and construction cost of preparation equipment, and the influence of copper matrix, achieving excellent appearance and performance, avoiding thermal stress. , the effect of shape rules

Inactive Publication Date: 2014-02-26
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main problem of this method is that when the urea decomposition products, which are corrosive to copper, are discharged through the copper substrate at higher temperatures, they can affect the copper substrate, thereby affecting the performance and application of the material.
At the same time, the exhaust gas collection system designed in this method increases the complexity and construction cost of the preparation equipment

Method used

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  • Preparation method of pore-opening foamy copper having controllable porosity and pore diameter
  • Preparation method of pore-opening foamy copper having controllable porosity and pore diameter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The first step, pretreatment of rock sugar particles

[0034] Rock sugar particles are crushed and sieved with different particle sizes to select rock sugar particles with an average particle size of 0.2mm;

[0035] The second step is to prepare the green body

[0036] The rock sugar granules obtained from the first step of processing and sieving are evenly mixed with 40 μm pure copper powder, and at the same time, an additive absolute alcohol of 2% of the total mass of the above-mentioned pure copper powder and rock sugar granules is added, wherein the rock sugar granules have a volume of 50% of the sum of the volume of particles and pure copper powder, the homogeneous mixture is loaded into a pressing mold, and the unidirectional pressure is pressed to 250MPa to obtain a green body;

[0037] The third step, the dissolution of rock sugar particles

[0038] Rinse the green body prepared in the second step in boiling water to dissolve the rock sugar particles. The wash...

Embodiment 2

[0043] The first step, pretreatment of rock sugar particles

[0044] The rock sugar particles are crushed and screened with different particle sizes, and the rock sugar particles with an average particle size of 0.4mm are selected;

[0045] The second step is to prepare the green body

[0046] The rock sugar granules obtained from the first step of processing and sieving are evenly mixed with 75 μm pure copper powder, and at the same time, an additive absolute alcohol of 3% of the total mass of the above-mentioned pure copper powder and rock sugar granules is added, wherein the rock sugar granules have a volume of rock sugar 50% of the sum of the volume of particles and pure copper powder, the homogeneous mixture is loaded into a pressing mold, and the unidirectional pressure is pressed to 300MPa to obtain a green body;

[0047] The third step, the dissolution of rock sugar particles

[0048] Rinse the green body prepared in the second step in boiling water to dissolve the roc...

Embodiment 3

[0053] Other steps are the same as in Example 2, except that the volume of the rock sugar particles is 60% of the sum of the rock sugar particles and the volume of pure copper powder, and the resulting copper foam product has an open-cell structure, with an average porosity of 60% and an average pore diameter of 0.4mm .

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PUM

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Abstract

The invention discloses a preparation method of pore-opening foamy copper having controllable porosity and pore diameter. The method comprises the steps: adopting a powder metallurgy method, mixing uniformly rock candy particles with an electrolytic copper powder and an additive anhydrous ethanol, then pressing to obtain a green blank, placing the green blank in boiling water, rinsing to thoroughly dissolve and remove the rock candy particles, after washing and drying, placing the obtained article in an inert gas atmosphere for sintering, cooling together with a furnace to the room temperature, and thus obtaining the pore-opening foamy copper product constructed by a three-dimensional interconnected space network and having the porosity of 50-85% and the average pore diameter of 0.2-2 mm. The obtained pore-opening foamy copper has higher sintering quality, and has quite good mechanical properties and compressive energy absorption characteristic.

Description

technical field [0001] The technical scheme of the invention relates to the manufacture of metals with open or closed pores, in particular a method for preparing open-cell foamed copper. Background technique [0002] Open-cell copper foam is a new multifunctional material with a large number of interconnected pores evenly distributed in the copper matrix. It has a high specific surface area and has the characteristics of sound absorption, penetration, filtration and energy absorption. The fields of environmental protection, machinery, electronics, aviation, buffering and shock absorption and noise reduction all have huge market application potential. [0003] Regarding the preparation method of foamed copper, the existing technologies that have been developed include: directional solidification method, dealloying method, electrodeposition or vapor deposition method, molten metal infiltration method and powder metallurgy method. Among them, the directional solidification met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C9/00
Inventor 王清周刘惟均崔春翔陆东梅徐萌张明坤
Owner HEBEI UNIV OF TECH
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