High-heat-conducting carbon/carbon composite material and preparation method thereof

A carbon composite material and high thermal conductivity technology, applied in the field of carbon material manufacturing, can solve problems such as cumbersome process flow, achieve broad application prospects, less equipment, and low energy consumption

Active Publication Date: 2018-06-01
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current hot press forming method to prepare carbon/carbon composite materials is mainly based on low temperature hot press forming, which can only realize the forming of composi

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] An embodiment of the present invention provides a method for preparing a high thermal conductivity carbon / carbon composite material, comprising the following steps:

[0024] Step 1. Alternate layering of carbon fiber cloth and mesophase pitch felt with room temperature thermal conductivity greater than 500W / mK to obtain a laminated structure;

[0025] Step 2, performing hot pressing, high temperature treatment and high pressure graphitization treatment on the laminated structure to obtain a high thermal conductivity carbon / carbon composite material.

[0026] In the preparation method of the high thermal conductivity carbon / carbon composite material provided by the embodiment of the present invention, a laminated structure is obtained by alternately layering the mesophase pitch in the form of a thin felt and the carbon fiber cloth reinforcement, which greatly reduces the time required for the carbon fiber layering. It can greatly improve the preparation rate and efficien...

Example Embodiment

[0038] Example 1

[0039] 1) The ThermalGraph fabric EWC-600X eight satin (high thermal conductivity carbon fiber cloth) produced by Cytec Company in the United States is used as the reinforcement. 8*8;

[0040] 2) A naphthalene-based mesophase pitch with a softening point of about 285°C is selected as the matrix carbon precursor, and a high-temperature calender is used to prepare a mesophase pitch thin felt. After the calendering is completed, the thin felt is passed through water for rapid cooling;

[0041] 3) Cut high thermal conductivity carbon fiber cloth and mesophase pitch thin felt for alternate layering, then put it into an ultra-high temperature hot press, and start to heat up after the mold is closed. The hot pressing process is: from RT (room temperature) to 300 ℃ within 1h After holding for 30min, pressurize to 1MPa, and every 10min thereafter, pressurize 1MPa until the pressure reaches 5MPa; then keep the pressure of 5MPa, continue to heat up to 350℃ at a rate ...

Example Embodiment

[0043] Example 2

[0044] 1) Select the plain weave cloth woven by XN90 carbon fiber produced by Japan Graphite Fiber Corporation (NGF) as the reinforcement, the fiber specification is 2K, the room temperature thermal conductivity is 500W / m·K, and the warp and weft density is 2*2;

[0045] 2) A naphthalene-based mesophase pitch with a softening point of about 285°C is selected as the matrix carbon precursor, and a high-temperature calender is used to prepare a mesophase pitch thin felt, the temperature of the calender roller is controlled at around 320°C, and the thickness of the thin felt is controlled at ~ 0.1mm , After the calendering is completed, the thin felt is passed through water for rapid cooling;

[0046] 3) Cut high thermal conductivity carbon fiber cloth and mesophase pitch thin felt for alternate layering, then put it into an ultra-high temperature hot press, and start to heat up after the mold is closed. The hot pressing process is: from RT (room temperature) to...

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Abstract

The invention relates to a high-heat-conducting carbon/carbon composite material and a preparation method thereof, and belongs to the technical field of carbon material manufacturing. The preparationmethod comprises the following steps: alternately laying a carbon fiber cloth and intermediate phase asphalt felt to obtain a laminated structure, wherein the thermal conductivity of the carbon fibercloth is greater than 500W/mK at room temperature; carrying out hot-pressing forming on the laminated structure, and carrying out high-temperature treatment and high-pressure graphitizing treatment toobtain the high-heat-conducting carbon/carbon composite material. The method has the advantages of simple process, little time consumption, low energy consumption and the like, and the preparation rate and efficiency of the high-heat-conducting carbon/carbon composite material can be greatly improved. The prepared high-heat-conducting carbon/carbon composite material has a uniform internal structure and excellent heat conduction and mechanical properties, and has wide application prospects in the aspects of heat control and heat management in the fields of aerospace, nuclear reactor, electronic industry and the like.

Description

technical field [0001] The invention relates to a high thermal conductivity carbon / carbon composite material and a rapid preparation method thereof, belonging to the technical field of carbon material manufacturing. Background technique [0002] With the rapid development of science and technology, heat dissipation and thermal management have become key technologies for the development of many fields. Many electronic components of aerospace vehicles need to work normally at an ambient temperature of 40-60°C. With the development of electronic technology, aircraft electronic equipment is becoming smaller, lighter, and more compact in structure. During operation, a large amount of The heat dissipation also puts forward higher and higher requirements for heat dissipation materials, which are an important part of thermal control. Large-area thin-plate structures of space vehicles such as satellites, missile nose cones, solid rocket motor nozzles and other parts with severe work...

Claims

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Application Information

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IPC IPC(8): C04B35/83
CPCC04B35/83
Inventor 冯志海樊桢余立琼李炜李兴超
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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