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High thermal conductivity C/C composite and preparation method

A composite material and high thermal conductivity technology, applied in the field of C/C composite material preparation, can solve the problems of insignificant improvement of thermal conductivity and no formation of an interface transition layer, and achieve the effects of improving thermal conduction efficiency, high thermal conductivity and simple process

Inactive Publication Date: 2014-04-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the existing technical solutions, the interface modification of C / C composite materials is basically used to improve the interface bonding between carbon fiber and resin carbon, and is rarely used for interface modification between carbon fiber and pyrolytic carbon matrix; Lu Xuefeng et al. use nano-carbon Fiber adjusts the interface between carbon fiber and pyrolytic carbon, but does not form a complete interfacial transition layer, and is mainly used to improve the mechanical properties of the material, and the improvement of thermal conductivity is not obvious

Method used

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  • High thermal conductivity C/C composite and preparation method
  • High thermal conductivity C/C composite and preparation method
  • High thermal conductivity C/C composite and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0046] (1) PAN-based T300 (12K) carbon fiber non-weft cloth produced by Toray, Japan, was ultrasonically vibrated in acetone solution for half an hour, soaked for 24 hours, then washed repeatedly with deionized water for 6 times, and then dried Dry in box for use;

[0047] (2) Laminating the weft-free fabrics treated in step (1) along the same direction to obtain a unidirectional long-fiber carbon fiber matrix with a fiber volume content of 36%;

[0048] (3) Soak the carbon fiber matrix obtained in step (2) in a nickel nitrate solution with a mass concentration of 0.2% for 4 hours, and evaporate water in the air after taking it out. Then put the preform into the tube furnace, under N 2 Heating to 450°C for calcination in the atmosphere and keeping it for 1.5h to remove NO 3 roots; and then heated to 550 ° C, H 2 reduction to obtain catalyst nickel particles, H 2 with N 2 The volume ratio is 3:2, stop passing H after reducing for 1.0h 2 ; The catalyst nickel particles are...

Embodiment 2

[0055] (1) PAN-based T300 (12K) carbon fiber non-weft cloth produced by Toray, Japan, was ultrasonically vibrated in acetone solution for half an hour, soaked for 24 hours, then washed repeatedly with deionized water for 6 times, and then dried Dry in box for use;

[0056] (2) Laminating the weft-free fabrics treated in step (1) along the same direction to obtain a unidirectional long-fiber carbon fiber matrix with a fiber volume content of 30%;

[0057] (3) Soak the carbon fiber matrix obtained in step (2) in a nickel nitrate solution with a mass concentration of 0.1% for 4 hours, and evaporate water in the air after taking it out. After soaking in the nickel nitrate solution, the preform was placed in a tube furnace, under N 2 Heating to 450°C for calcination in the atmosphere and keeping it for 1.5h to remove NO 3 roots; and then heated to 550 ° C, H 2 reduction to obtain catalyst nickel particles, H 2 with N 2 The volume ratio is 3:2, stop passing H after reducing for...

Embodiment 3

[0064] (1) PAN-based T300 (12K) carbon fiber non-weft cloth produced by Toray, Japan, was ultrasonically vibrated in acetone solution for half an hour, soaked for 24 hours, then washed repeatedly with deionized water for 6 times, and then dried Dry in box for use;

[0065] (2) Laminate the non-woven fabrics treated in step (1) in the same direction to obtain a unidirectional long-fiber carbon fiber matrix with a fiber volume content of 34%

[0066] (3) Soak the carbon fiber matrix obtained in step (2) in 0.1% nickel nitrate solution for 4 hours, and evaporate the water in the air after taking it out. After soaking in the nickel nitrate solution, the preform was placed in a tube furnace, under N 2 Heating to 450°C for calcination in the atmosphere and keeping it for 1.5h to remove NO 3 roots; and then heated to 550 ° C, H 2 reduction to obtain catalyst nickel particles, H 2 with N 2 The volume ratio is 3:2, stop passing H after reducing for 1.0h 2 ; The catalyst nickel pa...

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Abstract

A high thermal conductivity C / C composite comprises carbon fiber base bodies, nano carbon pipes, and pyrolytic carbons, wherein the nano carbon pipes are vertically distributed on the surfaces of the carbon fiber base bodies; the pyrolytic carbons are deposited on the surfaces of the carbon fibers and the nano carbon pipes in a 'three-dimensional' manner to form a high-texture CNT / PyC interface transitional layer. The preparation method comprises the following steps: laminating unidirectlonal weftless cloth to form unidirectional long carbon fibers base bodies, soaking in a nickel nitrate solution, drying and calcining; introducing H2 for reduction; after in-situ growth of nano carbon pipes, performing CVD deposition and graphitization processing to obtain the C / C composite. The composite is reasonable in structure, high in thermal conductivity, simple in process, and convenient in operation; the nano carbon pipes are vertically distributed on the surfaces of the carbon fibers; the high-texture CNT / PyC interface transitional layer is formed between the carbon fibers and the base body carbons through the processes of CVD deposition and graphitization processing, so that the heat conduction efficiency of the base bodies and the transitional layer is greatly improved. Therefore, the composite is suitable for industrialized production.

Description

technical field [0001] The invention relates to a high thermal conductivity C / C composite material and a preparation method thereof, in particular to a high thermal conductivity C / C composite material modified by vertically growing carbon nanotubes on the surface of carbon fibers and a preparation method thereof. The invention belongs to the technical field of C / C composite material preparation. Background technique [0002] Carbon fiber reinforced carbon base (abbreviated as carbon / carbon, specific to the present invention is C / C) composite material with its low density, high temperature strength, high modulus, high temperature thermal stability, small linear expansion coefficient, thermal conductivity High, stable friction coefficient, ablation resistance, corrosion resistance and a series of excellent properties, it is considered to be a new type of high temperature resistant structural material with the most development prospects, and has been widely used in aerospace an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83
Inventor 陈洁肖鹏熊翔
Owner CENT SOUTH UNIV
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