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Two-dimensional carbon-metal configuration composite material and preparation method and application thereof

A two-dimensional carbon, composite material technology, applied in chemical instruments and methods, heat exchange materials, electrical components, etc., can solve the problem of difficult to meet the matching requirements of high thermal conductivity and low thermal expansion coefficient of thermal management.

Inactive Publication Date: 2021-09-07
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Document (4) "Effect of carbon nanotube surface modification on thermal properties of copper-CNT composites (Journal of Materials Chemistry, 2011, 21 (43): 17541)" (carbon nanotube surface modification on thermal properties of copper-carbon nanotube composites Influence) Although carbon nanotubes with high thermal conductivity are added to the copper matrix, because of the disordered arrangement of carbon nanotubes in the pure copper matrix, the thermal conductivity of the composite material does not increase but decreases compared to pure copper
[0004] Therefore, metal matrix composites added to existing two-dimensional carbon materials (graphite paper / graphene flakes / graphene nanosheets, etc.) are difficult to meet the requirements of thermal management for high heat due to intrinsic anisotropy. Conductivity and low thermal expansion coefficient matching requirements

Method used

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  • Two-dimensional carbon-metal configuration composite material and preparation method and application thereof
  • Two-dimensional carbon-metal configuration composite material and preparation method and application thereof

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preparation example Construction

[0043] In the preparation method of the present invention, aluminum foil, surface-modified copper foil, graphite paper, and graphene film are laminated and rolled, or graphite flakes and graphene nanosheets after ultrasonication are laminated with aluminum foil and surface-modified copper foil Compositing, constructing a coaxial helical laminated structure, and finally obtaining a two-dimensional carbon-metal structured composite material with high thermal conductivity and low thermal expansion coefficient matching through hot isostatic pressing sintering and hot extrusion.

[0044]

[0045] Such as figure 1 As shown, the two-dimensional carbon-metal configuration composite material of the present invention is obtained by the coaxial configuration of the metal foil with a volume fraction of 20-90% and the carbon material with a volume fraction of 10-80%; wherein, the metal foil is selected from From aluminum foil or surface-modified copper foil; the carbon material is select...

Embodiment 1

[0072] The preparation method of the two-dimensional graphite paper-copper composite material of the present embodiment comprises the following steps:

[0073] (1) Annealing a copper foil with a thickness of 25 μm in a hydrogen-argon mixed atmosphere to remove surface oxides to obtain an annealed copper foil.

[0074] (2), use chemical vapor deposition (CVD) to grow graphene in situ on the surface of the annealed copper foil, then place the graphene-modified copper foil and graphite paper with a purity of 99.9% and a thickness of 15 μm, and roll it It is 6 cm in diameter and a single-core coaxial cylinder blank with a height of 10 cm.

[0075] (3) The single-core coaxial cylinder billet is then subjected to hot isostatic pressing sintering under the protection of an argon atmosphere. The temperature in the furnace rises to 900°C in 2 hours, and the pressure is increased to 130MPa while the temperature is rising, followed by heat preservation and pressure holding for 2 hours. ...

Embodiment 2

[0078] The preparation method of the two-dimensional graphite paper-aluminum composite material of the present embodiment comprises the following steps:

[0079] (1) Annealing an aluminum foil with a thickness of 25 μm in an argon atmosphere to remove surface oxides to obtain an annealed aluminum foil.

[0080] (2), the annealed aluminum foil and graphite paper with a purity of 99.9% and a thickness of 25 μm are laminated and rolled into a single-core coaxial cylinder blank with a diameter of 6 cm and a height of 10 cm.

[0081] (3) The single-core coaxial cylinder billet is then subjected to hot isostatic pressing sintering under the protection of an argon atmosphere. The temperature in the furnace rises to 500°C in 2 hours, and the pressure is increased to 130MPa while the temperature is rising, followed by heat preservation and pressure holding for 2 hours. Cooling was started to obtain a graphite paper-aluminum composite body with a single-core coaxial configuration and ma...

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Abstract

The invention provides a two-dimensional carbon-metal configuration composite material and a preparation method and an application thereof. The preparation method comprises the steps that a metal foil is subjected to annealing reduction, and the annealed metal foil is obtained; the annealed metal foil and a carbon material are laminated and rolled into a single-core coaxial cylinder blank, and the carbon material is selected from one or more of graphite paper, crystalline flake graphite, a graphene nanosheet and a graphene film; hot isostatic pressing sintering is carried out on the single-core coaxial cylinder blank under the protection of argon to obtain a carbon-metal composite material blank; the sheath is removed from the carbon-metal composite material blank, and hot extrusion is carried out to obtain the composite material with high thermal conductivity and low thermal expansion coefficient. By means of the laminated cylindrical coaxial configuration design, the isotropy of the two-dimensional carbon-metal composite material in the transverse section can be guaranteed, high heat conductivity can be obtained in the longitudinal direction, and therefore the problem that the heat conductivity and thermal expansion of a thermal management material are not matched is solved while the heat conduction performance of the material is improved.

Description

technical field [0001] The invention belongs to the technical field of metal matrix composite materials and thermal management materials, and specifically relates to a two-dimensional carbon-metal structured composite material with coaxial configuration, high thermal conductivity and low thermal expansion, and its preparation method and application. Background technique [0002] In recent years, with the rapid development of the electronic information industry, the integrated circuit industry has entered a period of rapid development. As the carrier and core component of integrated circuits, chips are becoming a basic, leading and strategic industry related to national economic and social development. In addition, with the continuous improvement of chip integration and assembly density, efficient heat dissipation has become the main factor affecting chip performance; in the thermal management system, the design and application of metal substrates with high thermal conductivi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/14H01L23/373
CPCC09K5/14H01L23/3735
Inventor 熊定邦张晓辉李志强张荻
Owner SHANGHAI JIAO TONG UNIV
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