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A method for preparing metal foam from coke composite blowing agent

A composite foaming agent and metal foam technology, applied in the field of preparation of new metal materials, can solve the problems of long process, cumbersome operation, slow deposition speed, etc., achieve good mechanical properties, simple preparation process, and prevent gas from escaping

Active Publication Date: 2019-09-17
YUHUAN DEGU NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, the metal foam prepared by electrodeposition has high porosity and is very uniform, but the process is long, the operation is cumbersome, and the cost is slightly high; the metal foam prepared by chemical decomposition has the problem of sealing pores and residual carbon for nickel foam. Problems: The operating conditions for preparing metal foam by vacuum vapor deposition are strict, the deposition speed is slow, the investment is large, and the production cost is high; the technology of the foaming method is generally more complicated and difficult to master, and it is mainly the preparation of low melting point metal foam; The casting method is only suitable for metals and alloys with low melting points (such as Al, Pb, Sn, etc.); casting around granular materials can obtain castings with very complex shapes; sintering with metal fibers instead of metal powders can be used for sieves. metal foam

Method used

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  • A method for preparing metal foam from coke composite blowing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing metal foam by coke composite foaming agent is characterized in that the specific steps are as follows:

[0029] (1) Mix 10kg of aluminum powder with a particle size of less than 0.5mm and 0.5kg of superfine coke with a particle size of 5-10μm, add 0.45% kg of dispersant barium stearate, and set the temperature in a high-speed mixer at 80-100 ℃, the rotation speed is 100~120r / min, the treatment time is 20min, and the dispersion is uniform, so that the dispersant forms a film and covers the surface of the metal powder and ultra-fine coke;

[0030] (2) After the mixed material obtained in step (1) is cooled to room temperature, mix the mixed material with water, and grind it in a kneader for 10 minutes to mix it evenly to form a paste, forming a stable viscous paste with a viscosity of 3500cP ; The consumption of the water is 20% of the mixed material quality.

[0031] (3) Raise the temperature of the viscous paste to make the superfine coke react w...

Embodiment 2

[0034] A method for preparing metal foam by coke composite foaming agent is characterized in that the specific steps are as follows:

[0035] (1) Mix 10kg of copper powder with a particle size of less than 0.5mm and 0.8kg of ultra-fine coke with a particle size of 5-10μm, add 0.56kg of dispersant zinc stearate in a high-speed mixer at a temperature of 80-100°C, The rotation speed is 100~120r / min, the processing time is 30min, and the dispersion is uniform, so that the dispersant forms a film and covers the surface of the metal powder and ultra-fine coke;

[0036](2) After the mixed material obtained in step (1) is cooled to room temperature, mix the mixed material with water, and grind it in a kneader for 15 minutes to mix it evenly to form a paste, forming a stable viscous paste with a viscosity of 6000cP ; The consumption of the water is 20% of the mixed material quality.

[0037] (3) Raise the temperature of the viscous paste to make the superfine coke react with water vap...

Embodiment 3

[0040] A method for preparing metal foam by coke composite foaming agent is characterized in that the specific steps are as follows:

[0041] (1) Mix 10kg of nickel powder with a particle size of less than 0.5mm and 1kg of superfine coke with a particle size of 5-10μm, add 0.4% kg of dispersant magnesium stearate, and set the temperature in a high-speed mixer at 80-100°C , the rotation speed is 100~120r / min, the processing time is 20min, and the dispersion is uniform, so that the dispersant forms a film and covers the surface of the metal powder and ultra-fine coke;

[0042] (2) After the mixed material obtained in step (1) is cooled to room temperature, mix the mixed material with water, and grind it in a kneader for 20 minutes to mix it evenly to form a paste, forming a stable viscous paste with a viscosity of 4000cP ; The consumption of the water is 35% of the mixed material quality.

[0043] (3) Raise the temperature of the viscous paste to make the superfine coke react w...

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Abstract

The invention belongs to the technical field of preparation of metal materials, and provides a method for preparing a foamed metal by compounding coke and a foaming agent. The method comprises the following steps that 1, metal powder, the ultrafine coke and water are mixed in advance to form a viscous paste body; 2, heating is carried out to enable vapor to react with the coke to generate hydrogen and carbon monoxide, so that the viscous paste body is foamed while the metal powder is distributed in a foamed shape; and 3, the hydrogen and the carbon monoxide are ignited, the metal powder is burned in situ, so that the metal powder is firmly connected, and the foamed metal is formed. According to the method, the metal powder is prepared into the viscous paste body in advance so that low-temperature stable foaming can be realized, and the porosity is high; and the coke is adopted, the characteristics that the coke can react with the water to generate combustible gas is utilized, and the foamed metal powder is burned and connected in situ while foaming is carried out, so that the foamed metal with good strength is formed.

Description

technical field [0001] The invention belongs to the technical field of preparation of new metal materials, and provides a method for preparing foamed metal from a coke composite foaming agent. Background technique [0002] Porous materials can be divided into two categories, metal and non-metal, and can also be subdivided into three different types: porous ceramic materials, polymer porous materials and porous metal materials. Porous metal material is also called metal foam. As a structural material, it has the characteristics of low density, high porosity, and large specific surface area; as a functional material, it has the characteristics of porous, vibration reduction, damping, sound absorption, sound insulation, heat dissipation, and impact energy absorption. , electromagnetic shielding and other properties. Moreover, porous metal materials often have dual functions of structural materials and functional materials, and are a class of multi-purpose materials with excell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/11C22C1/08
Inventor 陈庆昝航
Owner YUHUAN DEGU NEW MATERIAL TECH CO LTD
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