Preparation method of carbon/carbon composite material with high heat conduction

A technology of carbon composite materials and high thermal conductivity, applied in the field of composite materials, can solve the problems of low material strength and difficulty in the application of high-temperature structural materials, and achieve the effect of large volume fraction, large thermal conductivity and small damage

Active Publication Date: 2016-09-28
湖南东映碳材料科技股份有限公司
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Problems solved by technology

The one-dimensional carbon/carbon composite material prepared by the above process has good unidirectional thermal conductivity, but th

Method used

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  • Preparation method of carbon/carbon composite material with high heat conduction
  • Preparation method of carbon/carbon composite material with high heat conduction

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Embodiment 1

[0028] see figure 1 , select the mesophase pitch-based carbon fiber treated by low temperature carbonization at 400℃, and prepare two-dimensional orthogonal ply by winding yarn on the X-Y plane ( figure 1 2 places in the middle), and a 20 mm thick mesophase pitch-based carbon fiber cross-ply was prepared. Then the above-mentioned layup is placed between two plain weave PAN-based carbon cloths, and passed through the T-300PAN-based carbon fiber of 2K ( figure 1 Middle 1) to get the fiber preform by puncturing in the Z direction. Then carbonization treatment at 1100°C and graphitization treatment at 2800°C were carried out to obtain a three-dimensional orthogonal high thermal conductivity fiber preform ( figure 2 in 3 places). Densified to 1.53g / cm by multiple chemical vapor infiltration 3 ( figure 2 4 places in the middle); followed by mechanical processing to remove the PAN-based carbon cloth layer on the surface, followed by liquid-phase impregnation and pyrolytic dens...

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Abstract

The invention discloses a preparation method of a carbon/carbon composite material with high heat conduction. The method comprises the following steps: a mesophase asphalt based carbon fiber which is treated by low temperature carbonization at 350-500 DEG C is prepared into an X-Y directional orthogonal paving layer whose thickness is 5-50mm by a winding method; a piece of PAN based carbon fiber carbon cloth is used for clamping the upper and lower surfaces of the asphalt based carbon fiber paving layer, bundles of the PAN based carbon fiber are used for carrying out puncture at a Z direction of the layer, and a three dimensional orthogonal fiber prefabricated body is obtained. High temperature carbonization and graphitization heat treatment are carried out, and a prefabricated body of the carbon/carbon composite material with high heat conduction is prepared. The carbon fiber prefabricated body is primarily densified to 1.30-1.60g/cm<3>, and the PAN based carbon fiber carbon cloth layers on the surface are removed; liquid phase infiltration pyrolysis is carried out, the material is densified to 1.70-2.10g/cm<3>, and finally the heat conductivity coefficient of the carbon/carbon composite material at X or Y direction is 200-350W/(m.K), and bending strength is 100-250MPa.

Description

technical field [0001] The invention belongs to the technical field of composite materials. In particular, it relates to a preparation method of a carbon / carbon composite material with high thermal conductivity and high strength. technical background [0002] Carbon / carbon composite materials are carbon fiber reinforced carbon matrix composite materials, which have a series of excellent properties such as high specific modulus, high specific strength, low thermal expansion coefficient, anti-ablation and thermal shock resistance, and are widely used in space shuttle nose cone caps and machine tools. The thermal protection system of the leading edge of the wing, the end cap of the intercontinental missile, the nozzle of the rocket engine, the brake disc of the aircraft, etc., are currently the most promising structural materials with high thermal conductivity and high temperature. In high thermal conductivity carbon / carbon composite materials, carbon fiber is not only the rei...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/84C04B41/52C04B35/622
CPCC04B35/622C04B35/83C04B41/52C04B2235/96C04B2235/9607C04B41/4529C04B41/5001C04B41/4535C04B41/478C04B41/46C04B41/522
Inventor 李轩科黄东李保六叶崇
Owner 湖南东映碳材料科技股份有限公司
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