Title:
METHOD FOR INCREASING DENSITY OF CARBON/CARBON COMPOSITE THICK PLATE
Document Type and Number:
WIPO Patent Application WO/2022/237749
Kind Code:
A1
Abstract:
Disclosed in the present invention is a method for increasing the density of a carbon/carbon composite thick plate. The preparation method comprises: first weaving sisal fibers having a diameter smaller than or equal to 400 μm and a length smaller than or equal to 10 mm into a carbon fiber preform, and then performing chemical vapor deposition densification, wherein the mass fraction of the sisal fibers in the preform is 1-5%, the thickness of the carbon fiber preform is 20-35 mm, and the density of the preform is 0.3-0.6g/cm3. In the present invention, by innovatively using the carbonization shrinkage of large-diameter sisal fibers during chemical vapor deposition, a gas channel in the thickness direction of the preform and a gas channel along the surface of a mesh are constructed in the carbon fiber preform to form other crisscross channels, such that the air permeability of the carbon fiber preform is improved, carbon source gas can be remotely delivered to the core of the preform, the density and the uniformity of the density distribution of the carbon source gas can be greatly improved, the difficulty of uniform densification of the carbon/carbon composite is solved, and the density of the prepared carbon/carbon composite reaches more than 1.8 g/cm 3.
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Inventors:
ZHANG FUQIN (CN)
HUANG BOYUN (CN)
ZENG FANHAO (CN)
YANG YU (CN)
HUANG BOYUN (CN)
ZENG FANHAO (CN)
YANG YU (CN)
Application Number:
PCT/CN2022/091847
Publication Date:
November 17, 2022
Filing Date:
May 10, 2022
Export Citation:
Assignee:
UNIV CENTRAL SOUTH (CN)
International Classes:
C04B35/622; C04B35/83; D04H1/4242
Domestic Patent References:
| WO1999011581A1 | 1999-03-11 |
Foreign References:
| CN113233910A | 2021-08-10 | |||
| CN1482098A | 2004-03-17 | |||
| CN112500184A | 2021-03-16 | |||
| CN109291544A | 2019-02-01 | |||
| CN112142470A | 2020-12-29 | |||
| GB2148187A | 1985-05-30 |
Attorney, Agent or Firm:
CHANGSHA RONG ZHI PATENT AGENCY (CN)
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