A carbon/carbon composite vapor deposition process

A carbon composite material and vapor deposition technology, which is applied in the field of carbon/carbon composite material vapor deposition technology, can solve the problems of long time consumption, achieve good mechanical properties, avoid the decline of mechanical properties, and shorten the processing time

Active Publication Date: 2022-01-14
内蒙古中晶科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method still takes a long time

Method used

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  • A carbon/carbon composite vapor deposition process
  • A carbon/carbon composite vapor deposition process
  • A carbon/carbon composite vapor deposition process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Preparation of carbon fiber braids: braid carbon fibers into cloth, pour nanofibers into a standard paper former, add water and stir for 5 minutes to obtain a nanofiber solution with a mass concentration of 0.4%, and the mass ratio of nanofibers to carbon fibers For 1:50, stir the fabric up and down in a standard paper former for 3 minutes, turn on the water filter, filter out the water, take it out, and dry it in an oven at 75°C for 60 minutes to obtain the interlayer fabric;

[0050] Weave the mesh tire and carbon cloth with carbon fiber raw materials respectively, arrange the interlayer between the mesh tire and carbon cloth, and compound it into a felt by needle punching. The mass ratio of the total mass of the mesh tire and carbon cloth to the interlayer cloth is 6:1; the felt Winding on the crucible mold, and then overlapping winding needle-punched carbon cloth and mesh tire, the density reaches 0.39g / cm 3 , to obtain the carbon fiber braid;

[0051] (2) Impr...

Embodiment 2

[0056] (1) Preparation of carbon fiber braids: braid carbon fibers into cloth, pour nanofibers into a standard paper former, add water and stir for 5 minutes to obtain a nanofiber solution with a mass concentration of 0.1%, and the mass ratio of nanofibers to carbon fibers 1:40, stir the fabric up and down in a standard sheet former for 3 minutes, turn on the water filter, filter out the water, take it out, and dry it in an oven at 75°C for 60 minutes to obtain the interlayer fabric;

[0057] Weave the mesh tire and carbon cloth with carbon fiber raw materials respectively, arrange the interlayer between the mesh tire and carbon cloth, and compound it into a felt by needle punching. The mass ratio of the total mass of the mesh tire and carbon cloth to the interlayer cloth is 4:1; the felt Winding on the crucible mold, and then overlapping winding needle-punched carbon cloth and mesh tire, the density reaches 0.24g / cm 3 , to obtain the carbon fiber braid;

[0058] (2) Impregna...

Embodiment 3

[0063] (1) Preparation of carbon fiber braids: braid carbon fibers into cloth, pour nanofibers into a standard paper former, add water and stir for 5 minutes to obtain a nanofiber solution with a mass concentration of 1%, and the mass ratio of nanofibers to carbon fibers 1:80, stir the cloth up and down in a standard paper former for 5 minutes, turn on the water filter, filter out the water, take it out, and dry it in an oven at 75°C for 60 minutes to obtain the interlayer cloth;

[0064] Weave the mesh tire and carbon cloth with carbon fiber raw materials respectively, arrange the interlayer between the mesh tire and carbon cloth, and compound it into felt by needle punching. The mass ratio of the total mass of the mesh tire and carbon cloth to the interlayer cloth is 10:1; the felt Winding on the crucible mold, and then overlapping winding needle-punched carbon cloth and mesh tire, the density reaches 0.57g / cm 3 , to obtain the carbon fiber braid;

[0065] (2) Impregnation ...

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Abstract

The invention discloses a carbon / carbon composite material vapor deposition process, which relates to the technical field of carbon material preparation. The preparation method includes preparation of carbon fiber braided piece, impregnation treatment and vapor deposition. Before vapor deposition, pretreat with nanoparticles and nanofibers. During vapor deposition, first set the temperature in the furnace to 800-950°C, and the carbon source is a mixed gas of methane, butene, and acetylene, and deposit for 50-150h; then set The temperature in the furnace is 1000-1200°C, the carbon source is methane, and the deposition time is 50-100 hours, so that the density of the carbon / carbon composite material crucible reaches above 1.8g / cm3. The invention enables the braid to effectively increase the deposition rate of carbon atoms in the braid material during vapor deposition, realize rapid densification, and obtain good mechanical properties at the same time.

Description

technical field [0001] The invention relates to the technical field of carbon material preparation, in particular to a carbon / carbon composite material vapor deposition process. Background technique [0002] Carbon / carbon composite material is a new type of high-performance structural functional composite material composed of multi-dimensional woven carbon fiber as a reinforcing phase and pyrolytic carbon formed by chemical vapor infiltration or liquid phase impregnation and cracking as a matrix. It has low density and elastic modulus. High strength, high specific strength, low coefficient of thermal expansion, corrosion resistance and good high temperature performance, etc., it has good application prospects in aerospace, chemical industry, metallurgy and nuclear energy and other fields. [0003] In recent years, with the promotion and application of carbon / carbon composite materials in civil equipment, many companies use carbon / carbon composite material crucibles to replac...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C04B35/83C04B35/52C04B35/622
CPCC04B35/83C04B35/52C04B35/622C04B2235/6567C04B2235/77C04B2235/96
Inventor张全顺张彦利郝志奋焦李周李志强李亚贺任佳乐
Owner内蒙古中晶科技研究院有限公司