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Method for preparing foam metal material with communication pore structure

A technology of foamed metal and connected pores, which is applied in the field of foamed metal materials, can solve the problems of uneven coating, cracks, and unevenness of pore bars, and achieves the effects of low production cost, simple operation steps and uniform structure.

Inactive Publication Date: 2012-11-14
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process also has some disadvantages: the polyurethane foam does not have good compatibility with the water-based slurry, if no proper pretreatment technology is adopted, the green body after the slurry will have exposed foam cells, ribs, Defects such as uneven coating of hole reinforcement; due to discontinuous and uneven coating, the hole reinforcement cannot resist the thermal stress generated in the pyrolysis process and is destroyed, resulting in defects such as cracks; due to the effect of the surface tension of the slurry , during the process of removing excess slurry, the slurry will gather into agglomerates at the intersection of organic foam pore ribs, and form plugged pores after drying

Method used

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  • Method for preparing foam metal material with communication pore structure

Examples

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Embodiment 1

[0029] The preparation method of the foamed nickel material with interconnected pore structure of the present embodiment comprises the following steps:

[0030] Step 1. Mix nickel carbonyl powder, carboxymethyl cellulose and deionized water, stir evenly, and prepare slurry A; the slurry A is composed of the following raw materials in weight percentage: nickel carbonyl powder 9.8%, carboxymethyl 0.2% cellulose, 90% deionized water; the average particle size of the nickel carbonyl powder is 40 μm; the nickel carbonyl powder is a kind of nickel powder;

[0031] Step 2. Put the polyurethane foam with a pore diameter of 10PPI into the slurry A described in step 1 and soak for 60s, then put the impregnated polyurethane foam into a centrifuge for centrifugation, and then put the centrifuged polyurethane foam into Dry in an oven at 50°C for 24 hours; the time of the centrifugation is 1min, and the speed of the centrifuge is 1200r / min;

[0032] Step 3, mix nickel carbonyl powder, poly...

Embodiment 2

[0038] The preparation method of the foamed nickel-chromium alloy material with interconnected pore structure of the present embodiment comprises the following steps:

[0039] Step 1. Mix nickel-chromium alloy powder, carboxypropyl cellulose and deionized water, stir evenly, and prepare slurry A; the slurry A is composed of the following raw materials in weight percentage: 19.5% nickel-chromium alloy powder, carboxypropyl cellulose Propyl cellulose 0.5%, deionized water 80%; the average particle size of the nickel-chromium alloy powder is 30 μm; the nickel-chromium alloy powder is a kind of nickel-based alloy powder;

[0040] Step 2. Put the polyurethane foam with a pore diameter of 20PPI into the slurry A described in step 1 and soak for 50s, then put the impregnated polyurethane foam in a centrifuge for centrifugation, and then put the centrifuged polyurethane foam into Dry in an oven at 60°C for 24 hours; the centrifugation time is 2 minutes, and the centrifuge speed is 900...

Embodiment 3

[0047] The preparation method of the foamed stainless steel material with interconnected pore structure of the present embodiment comprises the following steps:

[0048] Step 1. Mix stainless steel powder, stearic acid and deionized water, stir evenly, and prepare slurry A; the slurry A is composed of the following raw materials in weight percentage: 30% stainless steel powder, 0.5% stearic acid, deionized Ionized water 69.5%; the average particle size of the stainless steel powder is 20 μm;

[0049] Step 2. Put the polyurethane foam with a pore diameter of 30PPI into the slurry A described in step 1 and soak for 40s, then put the impregnated polyurethane foam into a centrifuge for centrifugation, and then put the centrifuged polyurethane foam into Put it into an oven and dry at 70°C for 18 hours; the time of the centrifugation is 5 minutes, and the rotating speed of the centrifuge is 600r / min;

[0050] Step 3. Mix stainless steel powder, polyethylene glycol and deionized wat...

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Abstract

The invention discloses a method for preparing a foam metal material with a communication pore structure. The method comprises the following steps of: immersing polyurethane foam plastic into slurry consisting of metal powder, anion surface active agent and deionized water; centrifuging the immersed polyurethane foam plastic in a centrifugal machine; drying the centrifuged polyurethane foam plastic; immersing the dried polyurethane foam plastic into slurry consisting of metal powder, an adhesive and deionized water; centrifuging the immersed polyurethane foam plastic in the centrifugating machine to obtain a foam billet; spraying the foam billet by adopting slurry consisting of the metal powder and a defoamer; drying the sprayed foam billet; and carrying out pyrolysis sintering on the dried foam billet in a sintering furnace to obtain the foam metal material with the communication pore structure. The method is resonable in design, simple in process and operation step and low in production cost; and the material prepared by the method has the characteristics of pore communication, no plugged pore, uniform structure, high porosity and the like.

Description

technical field [0001] The invention belongs to the technical field of foamed metal materials, in particular to a preparation method of a foamed metal material with a connected pore structure. Background technique [0002] Due to its low density, high porosity, high specific strength, high specific stiffness, large specific surface area, corrosion resistance, temperature resistance, and noise reduction, metal foam has been widely used by researchers from various countries since it came out in the 1940s. focus on. At present, metal foam has been popularized and applied in the fields of aerospace, electronic communication, construction, transportation, atomic energy, medicine, environmental protection, metallurgy and machinery. [0003] At present, there are many methods for preparing foam metal materials, mainly including melt foaming method, investment casting method, solid phase sintering method and metal deposition method. However, the above-mentioned preparation techniq...

Claims

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Application Information

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IPC IPC(8): B22F3/11
Inventor 王辉汤慧萍王建向长淑汪强兵迟煜頔康新婷李亚宁杨坤
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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