Ultra-large-size carbon/carbon composite material sheet and equipment for preparing the same

A composite material sheet, super-sized technology, applied in metal material coating process, gaseous chemical plating, coating and other directions, to achieve the effect of small deformation, near-net shape, guarantee stability and consistency

Pending Publication Date: 2020-08-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in the size of carbon / carbon composites brings challenges to uniform densification, and puts forward higher requirements for chemical vapor deposition technology and equipment

Method used

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  • Ultra-large-size carbon/carbon composite material sheet and equipment for preparing the same
  • Ultra-large-size carbon/carbon composite material sheet and equipment for preparing the same
  • Ultra-large-size carbon/carbon composite material sheet and equipment for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The super-sized carbon / carbon composite material sheet prepared in this example adopts a bulk density of 0.15g / cm 3 , Carbon felt with a size of 3500*1500*10mm is used as a carbon fiber prefabricated body, supported by anti-deformation tooling, assisted by a reactor and a carbon source component control device, and densified by chemical vapor deposition, as follows:

[0051] (1) First, the carbon fiber preform is supported between the anti-deformation tooling and a 10mm spacer is set; then two U-shaped grooves with side-wing heat-resistant steel skeleton are used to fix the anti-deformation tooling holding the carbon fiber prefab by bolts; The two heat-resistant steel skeletons are connected and fixed, and they are hoisted into the deposition furnace chamber.

[0052] (2) Two sets of carbon source component control devices are set inside the reaction chamber, one set is set at the bottom of the reaction chamber (gas path 1), and the other set is set at a height of 2000 ...

Embodiment 2

[0056] The super-sized carbon / carbon composite material sheet prepared in this example adopts a bulk density of 0.46g / cm 3 , The carbon fiber integral needle-punched felt with a size of 3500*1500*15mm is densified by chemical vapor deposition through the support of anti-deformation tooling, the reactor and the carbon source component control device, and the details are as follows:

[0057] (1) First, the carbon fiber preform is supported between the anti-deformation tooling and a 15mm spacer is set; then two U-shaped grooves with side-wing heat-resistant steel skeleton are used to fix the anti-deformation tooling holding the carbon fiber prefab by bolts; The two heat-resistant steel skeletons are connected and fixed, and they are hoisted into the deposition furnace chamber.

[0058] (2) Two sets of carbon source component control devices are set inside the reaction chamber, one set is set at the bottom of the reaction chamber (gas path 1), and the other set is set at a height ...

Embodiment 3

[0062] Other conditions in this example are the same as those in Example 2, except that the deposition time is increased. After 450h of vapor deposition, the super-large carbon / carbon composite material sheet of the present invention is obtained, and the overall bulk density of the sheet is 1.41g / cm 3 , the densification uniformity is ±0.04g / cm 3 .

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Abstract

The invention discloses a super-large-size carbon/carbon composite material sheet and equipment for preparing the same. The invention discloses a super-large-size carbon/carbon composite material sheet. A preparation method of the super-large-size carbon/carbon composite material sheet comprises the following steps: (1) designing and constructing a reactor; (2) clamping and loading a carbon fiberpreform; (3) performing carbon source component regulation and flow field control setting; (4) performing chemical vapor deposition densification; and (5) discharging and dismounting the tool. The invention further designs equipment matched with the process, the super-large-size carbon/carbon composite sheet with high straightness, uniform densification and small deformation can be obtained through cooperation of the equipment and the process, and a feasible method is provided for near-net forming preparation of the super-large-size carbon/carbon composite sheet.

Description

Technical field: [0001] The invention belongs to a preparation method in the field of chemical industry, and particularly relates to a preparation method and equipment of a super-sized carbon / carbon composite material sheet. Background technique: [0002] Carbon / carbon composite materials have low density, high specific strength, high specific modulus, excellent friction characteristics, high temperature resistance, thermal shock resistance, corrosion resistance and excellent high temperature mechanical properties, and can work for a long time under extremely harsh high temperature conditions. , has good stability, is a new type of structural and functional integration material related to the development of my country's strategic industries and national security, and has broad application prospects in the fields of aerospace, rail transit, nuclear industry and civil thermal fields. [0003] In recent years, the preparation technology of carbon / carbon composite materials has g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/52C04B35/622C23C16/26C23C16/455
CPCC04B35/52C04B35/622C04B35/83C04B2235/77C23C16/26C23C16/45568
Inventor 王雅雷熊翔张红波吕东泽李秋
Owner CENT SOUTH UNIV
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