Method for rapidly forming flat plate carbon/carbon composite material

A technology of carbon composite materials and forming methods, which is applied in the forming of carbon/carbon composite materials and the field of rapid prototyping of flat carbon/carbon composite materials, which can solve the problems of long densification cycle, reduced production efficiency, and increased preparation difficulty. Achieve the effects of good tissue uniformity, reduce preparation costs, and improve densification efficiency

Inactive Publication Date: 2011-10-19
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to prevent the deformation of the fabric, it is necessary to control it by applying tooling. At the same time, the densification cycle of carbon / carbon composite materials prepared by a single process is long and the cost is high.
[0004] At present, the preparation of carbon / carbon composite materials by a single chemical vapor deposition process or liquid phase composite process has a long period and high cost. Relatively complicated, the difficulty of preparation increases, and the production efficiency is also reduced, and the cost increases

Method used

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  • Method for rapidly forming flat plate carbon/carbon composite material
  • Method for rapidly forming flat plate carbon/carbon composite material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First put the carbon cloth into the prepared resin solution for impregnation, the solid content of the resin solution is 45%; then take it out to dry naturally, cut it into about 30 layers of square carbon cloth with a plane size of 400×400mm, and stack them together; Spread the release agent evenly on the upper and lower tables of the hot press, spread the stacked carbon cloth on the lower table, move the table so that the upper table only rests on the upper surface of the carbon cloth layer; turn on the power to make the upper and lower tables Start to heat up, preheat it through the heat conduction of the upper and lower tables to the carbon cloth layer and cure it at 200°C. The thickness of the cured material is about 11mm (the curing pressure can be adjusted appropriately to control the thickness); put the cured composite material into the carbonization In the furnace, vacuumize to remove the air inside the furnace body, then pass inert gas to normal pressure, turn ...

Embodiment 2

[0039]First take a piece of carbon fiber felt with a size of 300×300×25mm, then put it into a resin solution with a solid content of 50%, soak it for 8 hours under normal pressure; then take it out and dry it naturally to evaporate part of the resin solvent; 1. Evenly coat the release agent on the lower table, spread the carbon fiber felt on the lower table of the heat press machine, move the table so that the upper table only rests on the upper surface of the carbon fiber fabric; Facing the heat conduction of the fabric, it is preheated and cured at 280°C; the cured composite material is placed in a carbonization furnace, vacuumed to remove the air inside the furnace, and then the inert gas is introduced to normal pressure, and the power is turned on and the furnace The temperature is raised to 800°C for carbonization; the carbonized carbon / carbon composite material is placed in a high-temperature graphitization furnace, vacuumed to remove the air inside the furnace, and then ...

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Abstract

The invention aims at the problems of long preparation period, high cost and the like of a carbon / carbon composite material at present and provides a method for rapidly forming a flat plate carbon / carbon composite material. In the method, the thought of a resin-based composite material hot-pressing rapid forming process is adopted; and a carbon / carbon composite material carbonization process is combined with a high-pressure densification rapid densifying process. During preparation of the flat plate carbon / carbon composite material, the process is simple and is easy to control; the flat plate carbon / carbon composite material with large size and thick wall can be prepared; the flat plate carbon / carbon composite material has high density and high structural homogeneity; the preparation period can be greatly shortened; and cost of the material can be reduced.

Description

technical field [0001] The invention relates to a forming method of a carbon / carbon composite material, in particular to a rapid forming method of a flat carbon / carbon composite material, and belongs to the technical field of carbon / carbon composite material equipment. Background technique [0002] Carbon / carbon composites are mainly composed of carbon fiber and carbon matrix. They have high specific strength, good thermal stability at high temperature, and high thermal conductivity; high strength, high modulus, high fracture toughness at high temperature, and good biocompatibility. And a series of excellent properties such as wear resistance and ablation resistance, it has a wide range of applications in aviation, aerospace, nuclear energy and transportation, sports equipment, biomedical and other fields. [0003] The commonly used preparation methods of carbon / carbon composites mainly include chemical vapor deposition (chemical vapor filtration, CVI) and liquid phase compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622
Inventor 李新涛赵高文杨文彬许正辉冯志海钟建新滕柏林王正军
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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