Novel process for preparing charcoal/charcoal component by rapid chemical liquid-phase vaporization osmosis method

A technology of gasification infiltration and chemical liquid, which is applied in the field of induction heating chemical liquid phase gasification infiltration to prepare carbon/carbon components and rapid preparation of carbon/carbon composite materials, so as to improve the utilization rate of raw materials, reduce the preparation cost and shorten the preparation cycle Effect

Active Publication Date: 2009-10-07
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The rapid liquid phase gasification method of large-sized charcoal disks is not yet mature. The largest size of charcoal disks prepared by this method in China is 140mm in outer diameter. / Carbon Composite Method” patent, but only one plate can be prepared at a time

Method used

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  • Novel process for preparing charcoal/charcoal component by rapid chemical liquid-phase vaporization osmosis method
  • Novel process for preparing charcoal/charcoal component by rapid chemical liquid-phase vaporization osmosis method
  • Novel process for preparing charcoal/charcoal component by rapid chemical liquid-phase vaporization osmosis method

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Embodiment 1

[0068] Embodiment one : The present invention's fast chemical liquid phase vaporization infiltration method prepares the technology of charcoal / charcoal member:

[0069] (1) Carbon felt is used as the carbon / carbon component prefabricated body 8, with an outer diameter of 450mm, an inner diameter of 230mm, a thickness of 20mm, and an initial density of about 0.17g / cm 3 , placed on the upper and lower surfaces of the graphite heating element 10, then put it into the furnace body 6 of the rapid liquid-phase vaporization deposition furnace, and support it with a bracket 7, and use a gasket 42 to separate the two prefabricated bodies in the middle. The thermocouple 14 is respectively installed in such as figure 2 Three positions are shown. Wrap the heat insulating material 11 and cover the furnace cover 20.

[0070] (2) start mechanical vacuum pump 37, vacuumize furnace body 6, when furnace pressure is lower than 5KPa, charge into protective gas 16 (nitrogen N 2 ) to return ...

Embodiment 2

[0075] Embodiment two : The present invention's fast chemical liquid phase vaporization infiltration method prepares the technology of charcoal / charcoal member:

[0076] (1) Needle-punched felt is used as the carbon / carbon component preform 8, with an outer diameter of 450mm, an inner diameter of 230mm, a thickness of 20mm, and an initial density of about 0.55g / cm 3 , placed on the upper and lower surfaces of the graphite heating element 10, then put it into the furnace body 6 of the rapid liquid-phase vaporization deposition furnace, and support it with a bracket 7, and use a gasket 42 to separate the two prefabricated bodies in the middle. The thermocouple 14 is respectively installed in such as figure 2 Three positions are shown. Wrap the heat insulating material 11 and cover the furnace cover 20.

[0077] (2) start mechanical vacuum pump 37, vacuumize furnace body 6, when furnace pressure is lower than 5KPa, charge into N 2 Protect the gas 16 to restore the pressure ...

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Abstract

The invention discloses a process for preparing carbon / carbon components by a rapid chemical liquid-phase gasification infiltration method, which includes the following steps: (1) furnace installation (installing carbon / carbon component prefabricated bodies, graphite heating elements, thermocouples, etc.); (2) Feeding: add liquid precursors to the furnace body through the liquid precursor supply and return system; (3) pumping and filling protective gas: pump the air in the furnace body below 5kPa, and then fill the furnace body with protective gas (4) turn on the heating power supply and heat up; (5) heat preservation, gaseous precursor pyrolysis deposit carbon; (6) turn off the power supply and cool down; (7) take out the product: the obtained carbon / carbon component density reaches 1.60 to 1.70 g / cm3.

Description

(1) Technical field: [0001] The invention relates to a process for rapidly preparing carbon / carbon composite materials, in particular to a method for preparing carbon / carbon components by induction heating chemical liquid phase gasification and infiltration, and belongs to the technical field of carbon / carbon composite materials. (two) background technology: [0002] Carbon / carbon composite materials are widely used in aviation, aerospace and civil fields because of their excellent high-temperature mechanical, thermal and friction and wear properties, especially as aviation brake materials such as aircraft brake discs. At present, the two main methods for preparing carbon / carbon composites are chemical vapor infiltration (Chemical Vapor Infiltration, referred to as CVI) and resin and pitch impregnation carbonization. However, its preparation cycle is often as long as hundreds or thousands of hours, which leads to its high cost. Therefore, the development of a rapid densific...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/84
Inventor 罗瑞盈吴小文宋国英章劲草
Owner BEIHANG UNIV
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