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Foam skeleton structure reinforced metal-matrix composite material and preparation method

A technology of foam skeleton and composite materials, which is applied in metal material coating process, gaseous chemical plating, coating, etc., can solve the problems of low thermal conductivity of diamond, high thermal conductivity islands, etc.

Active Publication Date: 2016-07-20
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect of low thermal conductivity of diamond in the existing diamond particle-reinforced metal matrix composite materials, and build a high thermal conductivity foam skeleton structure reinforcement through chemical vapor deposition technology, and compound it with the metal matrix to become a high thermal conductivity island It is a high thermal conductivity channel, which greatly improves the thermal conductivity of high thermal conductivity materials in composite materials

Method used

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  • Foam skeleton structure reinforced metal-matrix composite material and preparation method
  • Foam skeleton structure reinforced metal-matrix composite material and preparation method
  • Foam skeleton structure reinforced metal-matrix composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Embodiment one: foam diamond skeleton strengthens silver-based composite material

[0052] Foamed diamond skeleton reinforced silver-based composite material. In this example, foamed copper with a pore size of 0.2mm is used as the substrate. The foamed diamond reinforcement accounts for 20% of the volume fraction of the composite material. First, clean the foamed copper three-dimensional network substrate according to step (1) , then adopt magnetron sputtering technology in step (2) to deposit a molybdenum film with a thickness of 50nm on the surface of the copper foam three-dimensional network skeleton as an intermediate transition layer; Particle foam skeleton substrate; step (4) adopts hot wire CVD to deposit diamond film, deposition process parameters: hot wire distance 6mm, substrate temperature 800°C, hot wire temperature 2200°C, deposition pressure 3KPa, CH 4 / H 2 The volume flow ratio is 1:99, and the thickness of the diamond film is 60 μm by controlling the de...

Embodiment 2

[0053] Embodiment two: foamed graphene skeleton strengthens copper-based composite material

[0054] Foamed graphene skeleton reinforced copper-based composite material, in this example, the porous ceramic alumina with a pore size of 2 mm is used as the substrate, and the foamed graphene reinforcement accounts for 10% of the volume fraction of the composite material. The substrate is cleaned, and then a tungsten film with a thickness of 200nm is deposited on the surface of the foamed alumina three-dimensional network skeleton by magnetron sputtering according to step (2) as an intermediate transition layer; then a large amount of mosaic in the middle of the mesh is obtained according to step (3). The foam skeleton substrate of nanocrystalline and microcrystalline diamond particles; (4) use plasma-assisted chemical vapor deposition to grow graphene in situ on the substrate surface, apply plasma-assisted growth on the foam skeleton substrate during the deposition process, and Ad...

Embodiment 3

[0055] Embodiment three: graphene / diamond foam skeleton strengthens copper-based composite material

[0056]Foamed diamond skeleton reinforced copper matrix composite material. In this example, nickel foam with a pore size of 0.3 mm is used as the substrate. The foamed diamond reinforcement accounts for 30% of the volume fraction of the composite material. Cleaning, at first according to step (1) the surface of foamed nickel three-dimensional network substrate (aperture is 0.05mm) is pretreated, then according to step (2) adopts the method for vapor deposition to deposit the chromium that thickness is 300nm on the surface of foamed nickel three-dimensional network skeleton Membrane is used as intermediate transition layer; Then according to step (3) obtain the foam skeleton substrate inlaid with a large amount of nanocrystalline and microcrystalline diamond particles in the middle of the mesh; (4) adopt hot wire CVD to deposit diamond film, deposition process parameters: hot wi...

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Abstract

The invention discloses a foam skeleton structure reinforced metal-matrix composite material and a preparation method thereof. The composite material comprises a foam skeleton, a surface strengthening material and a matrix, wherein the foam skeleton is made of foam metal, foamed ceramics or foamy carbon; the surface strengthening material is a high heat conduction material adopting a diamond film, a graphene film, a carbon nanotube and the like; the metal matrix material adopts one of copper, aluminum, a copper alloy, an aluminum alloy and the like. A reinforcing phase and a matrix phase of the prepared composite material keep continuous distribution in three-dimensional space, an interpenetrating network structure is formed, the influence of a composite interface on the thermal properties of the material can be weakened effectively, good plasticity and toughness of the metal matrix are not reduced, the reinforcing phase can become a whole, the heat conduction efficiency of a reinforcing body is realized to the greatest extent, the heat conductivity, the electric conductivity and the mechanical strength of the composite material are greatly improved compared with the traditional composite material, and the composite material is a multifunctional composite material with great potential.

Description

technical field [0001] The invention discloses a foam skeleton structure reinforced metal matrix composite material, which belongs to the technical field of composite material preparation. Background technique [0002] Diamond has excellent physical properties such as high thermal conductivity (up to 2200W / mK at room temperature), superhardness, and wear resistance. Carbon nanotubes and graphene are new carbon nanomaterials discovered in recent years, both of which have high thermal conductivity and excellent electrical and mechanical properties. Therefore, using diamond, graphene, carbon nanotube single phase or mixed phase as a reinforcing phase and metal composite can obtain more excellent thermal conductivity, electrical conductivity and mechanical properties, and meet the needs of different fields for thermal conductivity, electrical conductivity and mechanical properties. [0003] At present, the main research ideas at home and abroad are to increase the content of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C23C16/26C23C16/27
CPCC22C1/08C23C16/26C23C16/27
Inventor 周科朝魏秋平马莉余志明
Owner CENT SOUTH UNIV
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