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Preparation methods of carbon-carbon composite material and carbon-ceramic composite material with inner holes

A carbon-carbon composite material and carbon-ceramic composite material technology, which is applied in the field of preparation of carbon-carbon composite materials and carbon-ceramic composite materials

Active Publication Date: 2018-10-02
HUNAN SHIXIN NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] So far, there is no report on the preparation of high-precision inner holes in carbon-carbon or carbon-ceramic materials by non-machining methods

Method used

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  • Preparation methods of carbon-carbon composite material and carbon-ceramic composite material with inner holes
  • Preparation methods of carbon-carbon composite material and carbon-ceramic composite material with inner holes
  • Preparation methods of carbon-carbon composite material and carbon-ceramic composite material with inner holes

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Experimental program
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Effect test

Embodiment 1

[0078] see Figure 1a-1c , the carbon-ceramic composite material part 1 with a trapezoidal inner hole 12 in the illustration is a preferred solution of the present invention, and the carbon-ceramic composite material part 1 is a circular disc with a density of 2.0 g / cm 3 ~2.4g / cm 3 , its specific preparation method is:

[0079] Cover the trapezoidal graphite mold with a layer of carbon fiber paper with air guide grooves (the thickness of the carbon fiber paper with air guide grooves is 20mm) (one end is large and the other end is small) to obtain a spare mold; according to the number and distribution of inner holes set Fix the spare mould, and then use carbon fiber as raw material to weave according to the size of the carbon-ceramic composite material to obtain a density of 0.6g / cm 3 the prefabricated body;

[0080] The preform is placed in an argon protective gas atmosphere at 1800°C for degumming treatment, and then CVI’s C densification treatment is performed in a vapor de...

Embodiment 2

[0083] see Figure 2a-2c , the carbon-carbon composite material part 2 with a special-shaped inner hole 22 in the illustration is a preferred solution of the present invention, and the carbon-carbon composite material part 2 is an annular disc body with a density of 1.8-1.9 g / cm 3 , its specific preparation method is:

[0084] Coat the special-shaped plastic material mold with a layer of graphite paper (the thickness of the graphite paper is 0.15mm, and the fixed carbon content in the graphite paper is not less than 99wt%) to obtain a spare mold; according to the number and distribution of the set inner holes Fix the spare mold, and then use carbon fiber as raw material to weave according to the size of the carbon-carbon composite material to obtain a density of 0.6g / cm 3 the prefabricated body;

[0085] Place the preform in a nitrogen protective gas atmosphere at 1800°C for degumming and removal of the plastic mold, and then perform CVI densification treatment in a vapor de...

Embodiment 3

[0087] The density of carbon ceramic composite material is 2.2~2.4g / cm 3 , its specific preparation method is:

[0088] Cover the plastic material mold with graphite paper that has been thermally sprayed with SiC to obtain a spare mold; fix the spare mold according to the number and distribution of the set inner holes, and then use carbon fiber as the raw material according to the size of the carbon-ceramic composite material. Woven to obtain a density of 0.7g / cm 3 the prefabricated body;

[0089] Place the preform in a nitrogen protective gas atmosphere at 1800 ° C for degumming of carbon fibers and removal of plastic molds, and SiC graphite paper is adhered to the inner hole, and then CVI C densification treatment is carried out in a vapor deposition furnace, during which the process lasts Introduce carbon source gas propylene and diluent gas nitrogen, the volume ratio of carbon source gas and diluent gas is 1, and control the pressure in the furnace to 2000Pa, carry out c...

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Abstract

The invention relates to preparation methods of a carbon-carbon composite material and a carbon-ceramic composite material with inner holes. According to the preparation methods, by a method of embedding a plastic mould or a graphite mould with a predetermined shape and a predetermined size and coating the surface thereof with graphite paper with a special structure and special functions, or pretreated graphite paper or carbon fiber paper, a carbon fiber needle-punched preform is woven and moulded, then the carbon fiber needle-punched preform is degummed at high temperature in a protective atmosphere, then CVI densification and / or resin impregnation-cracking densification is performed, and finally after high-temperature graphitization or siliconizing treatment, the embedded plastic mould is removed or the graphite mould is taken out to obtain the carbon-carbon composite material and the carbon-ceramic composite material with special internal pore structures and functions. The preparation methods are simple and controllable, and are particularly suitable for preparing the carbon-carbon composite material and the carbon-ceramic composite material which have special functional requirements on the inner holes, such as heat dissipation, heat conduction and electricity conduction, and have very complicated inner holes.

Description

technical field [0001] The invention relates to a preparation method of a carbon-carbon composite material and a carbon-ceramic composite material, in particular to a preparation method of a carbon-carbon composite material with inner holes and a carbon-ceramic composite material. Background technique [0002] Carbon fiber-based reinforced composite materials have the characteristics of light weight, high strength, high specific modulus, high temperature resistance, fatigue resistance, corrosion resistance, and excellent thermodynamic properties. They are widely used as structural materials and high temperature and ablation resistant materials. It has advantages that metal materials and even other fiber-reinforced composite materials cannot match. In the preparation of carbon fiber-based reinforced composite materials, carbon fibers are generally added to materials such as resin, concrete, and metal as reinforcing fibers. The obtained materials have properties such as high s...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/573C04B35/622
CPCC04B35/573C04B35/622C04B35/83C04B2235/428C04B2235/48C04B2235/5248C04B2235/614C04B2235/616C04B2235/77
Inventor 肖鹏方华婵
Owner HUNAN SHIXIN NEW MATERIALS CO LTD
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