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Method for using domestic carbon fiber to prepare high-performance carbon-based composite material through rapid directional infiltration

A composite material and carbon fiber technology, applied in metal material coating process, gaseous chemical plating, coating, etc., to achieve the effects of improving utilization rate, avoiding gas retention, and shortening the preparation process cycle

Active Publication Date: 2012-07-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, there are few studies on the preparation of carbon-based composites from domestic carbon fibers in China, and many key technical problems in the process of rapid directional infiltration of domestic carbon fiber preforms have not been resolved.

Method used

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  • Method for using domestic carbon fiber to prepare high-performance carbon-based composite material through rapid directional infiltration
  • Method for using domestic carbon fiber to prepare high-performance carbon-based composite material through rapid directional infiltration

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Effect test

Embodiment 1

[0035] Its chemical vapor deposition equipment such as figure 1 As shown, the method of the present invention is carried out in the high-performance carbon-based composite material rapid directional infiltration airflow control equipment. The carbon fiber adopts domestic carbon fiber and is implemented with domestic carbon fiber.

[0036] The invention discloses a method for preparing a high-performance carbon-based composite material by rapid directional infiltration of domestic carbon fibers. The specific steps of the method are as follows:

[0037] Step 1: putting the carbon fiber preform into 70% nitric acid for oxidation treatment at 80° C. for 2 hours.

[0038] Step 2: The carbon fiber prefabricated body 6 has an outer diameter of 420mm, an inner diameter of 250mm, a thickness of 24mm, and an initial density of 0.45g / cm 3 , stably placed on the graphite circular plate 9, each prefabricated body is spaced apart with a graphite gasket 5, 40 graphite prefabricated bodies ...

Embodiment 2

[0043] Its chemical vapor deposition equipment such as figure 1 As shown, the method of the present invention is carried out in the high-performance carbon-based composite material rapid directional infiltration airflow control equipment. The carbon fiber adopts domestic carbon fiber and is implemented with domestic carbon fiber.

[0044] A method for preparing high-performance carbon-based composite materials by rapid directional infiltration of domestic carbon fibers. The specific steps of the method are as follows:

[0045] Step 1: put the domestic carbon fiber preform in 70% nitric acid for oxidation treatment at 80°C for 2 hours.

[0046]Step 2: The domestic carbon fiber preform 6 has an outer diameter of 45mm, an inner diameter of 280mm, a thickness of 23mm, and an initial density of 0.55g / cm 3 , stably placed on the graphite circular plate 9, each prefabricated body is spaced apart with a graphite gasket 5, 40 graphite prefabricated bodies are loaded at a time, and th...

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Abstract

A method for using domestic carbon fiber to prepare high-performance carbon-based composite material through rapid directional infiltration includes five steps: step 1: putting the domestic carbon fiber preforms in nitric acid for oxidation treatment for 2h at the temperature of 80 DEG C; step 2: putting the domestic carbon fiber preforms in a rapid directional infiltration furnace and filling graphite gaskets of the same thickness among all the carbon fiber preforms; step 3: vacuumizing the body of the rapid directional infiltration furnace, eclectically heating a graphite sleeve and heatingthe carbon fiber preforms; step 4: introducing carbon source gas and diluent gas from the furnace bottom, mixing the carbon source gas and the diluent gas according to certain volume rate, extractingthe gas from the furnace top and regulating the flow rate of gas according to the total weight of the preforms in the furnace; and step 5: gradually advancing the infiltration process of the preformsfrom the inside of the preforms to the outer surface and obtaining the high-performance carbon-based composite material after 120-200h of one-time infiltration, wherein in step 4, the pressure in thefurnace is subject to certain requirement. The method shortens preparation period, improves the utilization rate of pyrolic carbon precursor and reduces the preparation cost of carbon-based compositematerials.

Description

(1) Technical field [0001] The invention relates to a method for preparing high-performance carbon-based composite materials by rapid directional infiltration of carbon fibers, in particular to a method for preparing high-performance carbon-based composite materials by rapid directional infiltration of domestic carbon fibers, which belongs to the rapid preparation of carbon-based composite materials technology field. (2) Background technology [0002] Carbon fiber-reinforced carbon-based composites have received widespread attention since their accidental birth in the CHANCE VOUGHT laboratory in the United States in 1958, especially as high-temperature and wear-resistant materials that have been widely used in aviation, aerospace and other fields. Carbon-based composite materials have dual advantages in structure and function, and can meet the requirements of aviation brake pairs. Since they were first used in aircraft brakes in 1973, there have been more than 40 types of ci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C16/26C04B35/83C04B35/622
Inventor 罗瑞盈章劲草李进松燕瑛张云峰
Owner BEIHANG UNIV
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