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

A technology of gasification infiltration and chemical liquid is applied in the field of rapid preparation of carbon/carbon composite materials, induction heating chemical liquid phase gasification infiltration to prepare carbon/carbon components, and achieves the advantages of shortening the preparation period, improving the utilization rate of raw materials and reducing the preparation cost. Effect

Active Publication Date: 2008-04-09
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 gasification infiltration method prepares the new 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 thermocouples 14 are respectively installed at three positions as shown in FIG. 2 . 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 the ...

Embodiment 2

[0075] Embodiment two : The present invention's fast chemical liquid-phase gasification infiltration method prepares the new 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 thermocouples 14 are respectively installed at three positions as shown in FIG. 2 . 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 in ...

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Abstract

The invention discloses a new technique of preparing coal / coal components through rapid chemical liquid deposition, and consists of the following steps: firstly, the installation of a furnace: the coal / coal component prefab body, a graphite heating element, a thermocouple and so on are installed; secondly, the feeding of the materials: a liquid prodromic body is added into the furnace through the supply of the liquid prodromic body and a return system; thirdly, the air suction and the filling of the protective air: the air inside the furnace is taken out and kept below 5kPa, then the furnace is filled with protective air to one barometric pressure; fourthly, the turn-on of the heating power supply and the rise of temperature; fifthly, the heat preservation, and the decomposition and the deposition of a gaseous prodromic body; sixthly, the extraction of the product: the obtained coal / coal component has a density of 1.60-1.70g / cm<3>.

Description

(1) Technical field: [0001] The invention relates to a new 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 dens...

Claims

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Application Information

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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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