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Preparation method of continuous carbon fiber surface pyrolytic carbon/nickel composite coating

A composite coating and carbon fiber technology, applied in the field of materials, can solve the problems of long cycle, affecting carbon fiber reinforced metal matrix composite materials, low efficiency, etc., and achieve the effects of preventing oxidation, improving the effect of homogenization and infiltration, and improving the effect of preparation.

Active Publication Date: 2013-06-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the long cycle and low efficiency in the prior art, and there are a large number of micropores in the gel, the gas and organic matter released during the drying process will adversely affect the coating structure and affect the carbon fiber reinforced metal matrix composite. Insufficient preparation, the present invention proposes a method for preparing continuous carbon fiber surface pyrolytic carbon / nickel composite coating

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  • Preparation method of continuous carbon fiber surface pyrolytic carbon/nickel composite coating

Examples

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Embodiment 1

[0029] This example is a method for preparing a pyrolytic carbon / nickel composite coating on the surface of continuous carbon fibers, and the carbon fibers used in this example are 12K T700 carbon fibers.

[0030] The concrete steps of this embodiment are:

[0031] Step 1, depositing a pyrolytic carbon coating on the surface of the carbon fiber. The 12K T700 carbon fiber was placed in a chemical vapor deposition furnace, and a pyrolytic carbon coating was deposited by a conventional chemical vapor deposition method. Coating process parameters are: N 2 The penetration is 0.1~0.5m 3 / h,CH 4 The feed rate is 16-24L / h, the deposition temperature is 1000-1200°C, and the deposition time is 1-3 hours. After the chemical vapor deposition furnace is cooled to room temperature, the carbon fiber is taken out to obtain a carbon fiber with a pyrolytic carbon coating on the surface. . In this example, N 2 The throughput is 0.1m 3 / h,CH 4 The throughput is 18 L / h, the deposition temp...

Embodiment 2

[0044] This example is a method for preparing a pyrolytic carbon / nickel composite coating on the surface of continuous carbon fibers, and the carbon fibers used in the example are 3K T300 carbon fibers.

[0045] The concrete steps of this embodiment are:

[0046] Step 1, depositing a pyrolytic carbon coating on the surface of the carbon fiber. The 3K T300 carbon fiber was placed in a chemical vapor deposition furnace, and a pyrolytic carbon coating was deposited by a conventional chemical vapor deposition method. Coating process parameters are: N 2 The penetration is 0.1~0.5m 3 / h,CH 4 The feed rate is 16-24L / h, the deposition temperature is 1000-1200°C, and the deposition time is 1-3 hours. After the chemical vapor deposition furnace is cooled to room temperature, the carbon fiber is taken out to obtain a carbon fiber with a pyrolytic carbon coating on the surface. . In this example, N 2 The inflow is 0.3m 3 / h,CH 4 The throughput is 20 L / h, the deposition temperature...

Embodiment 3

[0059]This example is a method for preparing a pyrolytic carbon / nickel composite coating on the surface of continuous carbon fibers, and the carbon fibers used in this example are 6K T700 carbon fibers.

[0060] The concrete steps of this embodiment are:

[0061] Step 1, depositing a pyrolytic carbon coating on the surface of the carbon fiber. The 6K T700 carbon fiber was placed in a chemical vapor deposition furnace, and a pyrolytic carbon coating was deposited by a conventional chemical vapor deposition method. Coating process parameters are: N 2 The penetration is 0.1~0.5m 3 / h,CH 4 The feed rate is 16-24L / h, the deposition temperature is 1000-1200°C, and the deposition time is 1-3 hours. After the chemical vapor deposition furnace is cooled to room temperature, the carbon fiber is taken out to obtain a carbon fiber with a pyrolytic carbon coating on the surface. . In this example, N 2 The inflow is 0.5m 3 / h,CH 4 The throughput is 24 L / h, the deposition temperature...

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Abstract

The invention discloses a preparation method of a continuous carbon fiber surface pyrolytic carbon / nickel composite coating. According to the invention, a pyrolytic carbon coating is prepared on the surface of a carbon fiber in weftless carbon fiber cloth through a chemical vapor deposition method, and the thickness of the pyrolytic carbon coating is 0.03-0.1 micrometer. A nickel coating is prepared on the surface of the carbon fiber with the pyrolytic carbon coating through a chemical plating method. By controlling the reaction time of the carbon fiber in a chemical nickel-plating solution, the thickness of the nickel coating is controlled to 0.02-0.1 micrometer, so that the carbon fiber containing a pyrolytic carbon / nickel composite coating which is 0.05-0.2 micrometers in thickness is acquired. According to the preparation method, the carbon fiber can be well prevented from being oxidized and is effectively prevented from being damaged and destroyed; and the occurrence of too many interfacial reactions between the carbon fiber and aluminum alloy can be reduced because the microstructure of pyrolytic carbon tends to be graphitized so that the interface combinability between the carbon fiber and the aluminum alloy can be adjusted.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a method for preparing a pyrolytic carbon / nickel composite coating on the surface of continuous carbon fibers. Background technique [0002] With its low density, close to zero thermal expansion coefficient, high elastic modulus and excellent mechanical properties, carbon fiber has been studied and paid more and more attention by more and more people. The carbon fiber reinforced aluminum matrix composite prepared by using it as a reinforcement The material has excellent properties such as high specific strength, specific stiffness, and low thermal expansion coefficient. However, due to the smooth surface, low surface energy, and low reactivity of carbon fibers, the wettability with the matrix is ​​poor when the aluminum matrix composite is prepared as a reinforcement, and it is easy to have adverse interface reactions with the matrix at higher temperatures. The excessively str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/00C23C16/26C23C18/18C23C18/32
Inventor 齐乐华马玉钦周元彪郑武强鞠录岩周计明
Owner NORTHWESTERN POLYTECHNICAL UNIV
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