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High heat conductivity and high strength dense heterogeneous foamed SiC/Cu material and its preparing method

A foam material, high thermal conductivity technology, applied in high strength, high thermal conductivity foam material and its preparation, high density field, can solve the problems of poor wear resistance, insignificant effect, low thermal conductivity, etc., to improve the initial density and structure. Uniformity, avoid dead skin hollow, excellent mechanical properties

Inactive Publication Date: 2007-06-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the singleness of the matrix skeleton material composition of traditional mesh porous ceramics, either metal or ceramics, its performance is limited, which in turn limits its versatility in use
Metal foam is easy to oxidize at high temperature, so that the strength is greatly reduced, and the hardness is generally not very high, and the wear resistance is poor, especially under the erosion of high temperature or even high pressure fluid, the performance deterioration is still significant.
Ceramic foam is resistant to high temperature and corrosion, but its thermal conductivity is not high, and its high temperature stability is poor. In particular, the inherent brittleness of ceramics has become the biggest obstacle to its use as a structural element, and there are insurmountable technical problems in processing and installation. Currently, ZrO 2 There are many studies on the toughening of the second relative ceramic materials such as particles or fibers, and there are also methods of preparing ceramic matrix composites to strengthen structural ceramics, but these methods are very difficult to apply to the preparation of porous ceramics, and the effect is not obvious. In the mesh porous foam, the metal and the ceramic are blended to form a continuous state of the base material and the reinforcement phase, and make the two form a three-dimensional continuous structure at the microscopic scale, so that the high toughness of the metal can be used for the ceramic phase base The three-dimensional connection of materials can increase the toughness of mesh porous foam ceramics, improve the brittle fracture resistance and thermal stability of foam ceramics, and many advantages of metal materials (such as Cu, Al, etc. have high thermal conductivity and high electrical conductivity) can also play a role in ceramics. Improve the related properties of foam ceramics, so that foam ceramics can obtain high strength, toughness, high hardness, strong oxidation resistance and wear resistance under the condition of high melting point, and have certain ductility and good thermal stability

Method used

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  • High heat conductivity and high strength dense heterogeneous foamed SiC/Cu material and its preparing method
  • High heat conductivity and high strength dense heterogeneous foamed SiC/Cu material and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The mass ratio is respectively 60%: 35%: 5% average particle size 2 μm silicon carbide powder, aminophenol-formaldehyde resin, p-toluenesulfonic acid are co-dissolved in dehydrated alcohol, make slurry, and described slurry solution solute is total 70% of the weight; cut the polyurethane foam with a pore size of 1mm into the required size and immerse it evenly in the slurry, soak for 1 minute, take it out and squeeze off the excess slurry, air-dry and semi-cure at 50°C for 10 minutes, the above The process is repeated several times until a predetermined volume percentage of 70% (the volume percentage of the composite foam bars in the finished product) is reached. Then, put it into a high-pressure container, fill it with nitrogen to make the air pressure reach 12MPa, increase the temperature at a rate of 2°C per minute, raise the temperature to 250°C, and keep it for 1 hour to cure. Under the protection of argon, it is pyrolyzed to form a carbon skeleton; the heating rat...

Embodiment 2

[0046] The average particle size 2 μm silicon carbide powder, silicon powder, aminophenol-formaldehyde resin, and p-toluenesulfonic acid with a weight ratio of 45%: 15%: 35%: 5% are co-dissolved in absolute ethanol to make a slurry. The solute of the slurry solution is 60% of the total weight; the polyurethane foam with a pore size of 1 mm is cut into the required size and evenly immersed in the slurry, soaked for 1 minute, squeezed out the excess slurry after taking it out, and air-dried at 50°C Semi-cured for 10 minutes, the above process was repeated several times until reaching the predetermined volume percentage of 60% (the volume percentage of the composite foam tendons in the finished product). Then, put it into a high-pressure container, fill it with nitrogen to make the air pressure reach 12MPa, increase the temperature at a rate of 5°C per minute, raise the temperature to 250°C, and keep it for 1 hour to cure. Under the protection of argon, it is pyrolyzed to form a ...

Embodiment 3

[0048] Co-dissolve silicon carbide powder with an average particle size of 2 μm, epoxy resin (the brand name is EP0141-310), and p-toluenesulfonic acid with a weight ratio of 40%: 55%: 5% in absolute ethanol to make a slurry. The solute of the slurry solution is 50% of the total weight; the polyurethane foam with a pore diameter of 2mm is cut into the required size and immersed in the slurry evenly, soaked for 1 minute, squeezed out the excess slurry after taking it out, and air-dried for 50 ℃ semi-cured for 10 minutes, and the above process was repeated several times until reaching the predetermined volume percentage of 50% (the volume percentage of the composite foam tendons in the finished product). Then, put it into a high-pressure container, fill it with nitrogen to make the air pressure reach 10MPa, increase the temperature at a rate of 4°C per minute, raise the temperature to 200°C, and keep it for 1 hour to cure. Under the protection of argon, it is pyrolyzed to form a...

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Abstract

The present invention relates to heterogeneous foamed ceramic / metal material, and is especially a kind of high strength, high density and high heat conductivity heterogeneous foamed SiC / Cu material and its preparation process. The foamed SiC / Cu material has basic units of closed polygonal ring to form connected 3D network structure, and each of the closed polygonal ring units is heterogeneous foamed ribs comprising SiC in 50-95 vol% and metal Cu in 5-50 vol% and with the relative density not lower than 99 %. The foamed SiC / Cu material is prepared through organic foam soaking, hot pressing to densify, pressure injection filling, thermal decomposition and reaction sintering. The preparation process is simple and low in cost.

Description

technical field [0001] The invention belongs to the ceramic / metal multiphase mesh porous foam material and its preparation technology, and particularly provides a high-strength, high-density, high-thermal-conduction foam material composed of silicon carbide and metal Cu (abbreviated as SiC / Cu foam material) and its preparation method. technical background [0002] Mesh porous foam material is composed of matrix material skeleton, variable pore size, and high porosity. This kind of material has a three-dimensional network skeleton structure and the pores are interconnected. It is an important multifunctional material. At present, such foam materials mainly include foam metal and foam ceramics. Metal foam has multiple functions such as damping, sound, heat, and electromagnetic shielding. Its appearance is in line with the new trend of multifunctional structural materials, so it has developed rapidly in the past ten years. In addition to the general characteristics of porous ...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B38/08C04B35/565C04B35/622C04B35/64
Inventor 张劲松田冲曹小明
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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