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
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[0077] Example 1
[0078] See Figure 1a-1c , The carbon-ceramic composite material part 1 with trapezoidal inner hole 12 in the figure is a preferred solution of the present invention, and the carbon-ceramic composite material part 1 is a circular disc body with a density of 2.0g / cm 3 ~2.4g / cm 3 , Its specific preparation method is:
[0079] The trapezoidal graphite material mold is covered with a layer of carbon fiber paper with air guide grooves (the thickness of the air guide groove carbon fiber paper is 20mm) (one end is large and one end is small) to obtain a spare mold; according to the set number and distribution of inner holes Fix the spare mold, and then use carbon fiber as the raw material to weave according to the size of the carbon-ceramic composite material to obtain a density of 0.6g / cm 3 Prefabricated body;
[0080] The preform is placed in an argon protective gas atmosphere at 1800°C for degumming treatment, and then CVI C densification treatment is performed in a va...
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[0082] Example 2
[0083] See Figure 2a-2c , The carbon-carbon composite material part 2 with a special-shaped inner hole 22 in the figure is a preferred solution of the present invention. The carbon-carbon composite material part 2 is a circular disc body with a density of 1.8~1.9g / cm 3 , Its specific preparation method is:
[0084] Wrap 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%) on the special-shaped plastic mold to obtain a spare mold; according to the set number and distribution of inner holes Fix the spare mold, and then use carbon fiber as the raw material to weave according to the size of the carbon-carbon composite material to obtain a density of 0.6g / cm 3 Prefabricated body;
[0085] The preform is placed in a nitrogen atmosphere at 1800°C for degumming and plastic mold removal treatment, and then CVI C densification treatment is performed in a vapor deposition furnace,...
Example Embodiment
[0086] Example 3
[0087] The density of carbon ceramic composite material is 2.2~2.4g / cm 3 , Its specific preparation method is:
[0088] Cover a plastic mold with graphite paper thermally sprayed with SiC on one side to obtain a spare mold; fix the spare mold according to the set number and distribution of inner holes, and then use carbon fiber as the raw material according to the size of the carbon-ceramic composite material Weaving, the density is 0.7g / cm 3 Prefabricated body;
[0089] The preform is placed in a nitrogen atmosphere at 1800°C for carbon fiber degumming and plastic mold removal treatment, SiC graphite paper is stuck to the inner hole, and then CVI C densification treatment is carried out in a vapor deposition furnace. Introduce carbon source gas propylene and diluent gas nitrogen, the volume ratio of carbon source gas to diluent gas is 1, and the pressure in the furnace is controlled to 2000Pa, and chemical vapor deposition is performed at 1100°C for 200 hours to ...
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