Three-dimensional mesophase pitch-based carbon/carbon composite material with high heat conductivity and preparation technology thereof

A technology of mesophase pitch and carbon composite materials, which is applied in the field of carbon/carbon composite material manufacturing, can solve the problems of poor thermal conductivity, modulus and dimensional stability of composite materials, research limited to laboratory level, and difficulty in process amplification. , to achieve the effect of improving thermal management efficiency, promoting uniform heat distribution, and good dimensional stability

Active Publication Date: 2013-11-27
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

Domestic Shanxi Institute of Coal Chemical Industry, Beijing University of Chemical Technology, Central South University, and Institute of Aerospace Materials and Technology have carried out some related basic research work, and the prepared small-scale high thermal conductivity carbon / carbon composite materials are close to the level of foreign materials in terms of thermal conductivity, but Due to the limitation of raw materials, funds, etc., the research is limited to the laboratory level, and there is no related application
[0008] To sum up, a lot of work has been carried out in the preparation and application of high thermal conductivity carbon / carbon composites abroad, but there are few reports on the specific preparation process of high thermal conductivity carbon / carbon composites, and mesophase pitch is usually used as the matrix carbon. The high thermal conductivity carbon / carbon composite materials of the precursor are mostly limited to unidirectional or two-dimensional materials, and the preparation process usually adopts hot pressing molding. The materials and preparation process are relatively simple, and the process is difficult to scale up. , modulus and dimensional stability are poor

Method used

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  • Three-dimensional mesophase pitch-based carbon/carbon composite material with high heat conductivity and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Cut the Cytec2000 type high thermal conductivity mesophase pitch-based carbon fiber cloth into a size of 200*200mm, and use the carbon cloth puncture technology to prepare a three-dimensional high thermal conductivity carbon fiber fabric. The Z direction uses 6K M40J carbon fiber, and the volume content of the fabric fiber is 50%. Z The distance to the fiber bundle is 4.0mm, and the final size of the fabric is 200*200*50mm.

[0045] (2) Put the fabric prepared in step 1 into an intermediate frequency heat treatment furnace, vacuumize and fill it with argon for replacement protection, then raise the temperature to 1500°C at a rate of 10°C / min and keep it warm for 3 hours, then cool down freely.

[0046] (3) Take out the heat-treated fabric and put it into the mesophase pitch impregnation tank. The fabric is surrounded by mesophase pitch powder for embedding, then the lid is closed and the temperature is raised to 330°C and vacuumed to -0.1MPa. Heat preservation and pr...

Embodiment 2

[0059] (1) Cut the Cytec2000 type high thermal conductivity mesophase pitch-based carbon fiber cloth into a size of 100*100mm, and use the carbon cloth puncture technology to prepare a three-dimensional high thermal conductivity carbon fiber fabric. The Z direction uses 12K M40 carbon fiber, and the volume content of the fabric fiber is 60%. Z The distance to the fiber bundle is 5.0mm, and the final size of the fabric is 100*100*20mm.

[0060] (2) Put the fabric prepared in step 1 into an intermediate frequency heat treatment furnace, vacuumize and fill it with argon for replacement protection, then raise the temperature to 1800°C at a rate of 5°C / min and keep it warm for 2 hours, then cool down freely.

[0061] (3) Take out the heat-treated fabric and put it into the mesophase pitch impregnation tank. The fabric is surrounded by mesophase pitch powder for embedding, then the lid is closed and the temperature is raised to 330°C and vacuumed to -0.1MPa, and the heat preservation...

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Abstract

The invention relates to a three-dimensional mesophase pitch-based carbon / carbon composite material with high heat conductivity and a preparation technology thereof. The preparation technology comprises the following steps: firstly, by taking a mesophase pitch-based carbon fiber cloth with high heat conductivity as a reinforced body in the XY direction and a high-modulus carbon fiber as a reinforced fiber in the Z direction, preparing three-dimensional carbon fiber fabric with high heat conductivity by adopting a carbon cloth puncturing technology; secondly, by taking mesophase pitch as a precursor of matrix carbon, performing densifying treatment on the three-dimensional carbon fiber fabric with high heat conductivity by adopting a dipping / carbonizing technology; finally, performing graphitization treatment at a high temperature of 2800 DEG C above on the obtained materials, so as to obtain the three-dimensional mesophase pitch-based carbon / carbon composite material with high heat conductivity. Through the adoption of the technology method, the heat conductivity, modulus and dimensional stability of the carbon / carbon composite material are greatly improved, and the highest heat conductivity reaching 3600 w / mK of the material in the XY direction is increased by more than 5 times as compared with the common three-dimensional carbon / carbon composite material.

Description

technical field [0001] This patent relates to a three-dimensional mesophase pitch-based high thermal conductivity carbon / carbon composite material and its preparation process, which belongs to the technical field of carbon / carbon composite material manufacturing. Background technique [0002] High thermal conductivity carbon / carbon composite material with its excellent low density, high thermal conductivity, low expansion coefficient and unique high temperature high strength (can be applied in an oxygen-free or low-oxygen environment up to 3000 °C, and the material strength is from room temperature to 2000 °C Increase with temperature) and other properties have become the best candidate materials with high thermal conductivity at present, which are expected to replace traditional materials, occupy a leading position in the research and development of new thermal management and thermal dredging materials, and are widely used in national defense and electronics and other fields...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83
Inventor 樊桢冯志海孔清余立琼赵高文
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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