Rapid preparation method of low-cost carbon/carbon composite material

A carbon composite material and low-cost technology, applied in the field of composite materials, can solve the problems of high cost and long preparation cycle, and achieve the effects of cost reduction, cycle shortening and manufacturing cost reduction.

Active Publication Date: 2016-09-07
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem solved by the invention: overcome the problems of long preparation period and high cost of existing high-density carbon / carbon composite materials, provide a low-cost rapid preparation method of carbon / carbon composite materials, and realize high-density carbon / carbon composite materials rapid and low-cost preparation of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) The density is 0.6g / cm 3 Acupunctured carbon fiber flat fabric with a thickness of 30mm. A graphite plate with a sieve hole is used as a profiling tool, and it is fixed by graphite bolts. Then put it into the ethanol solution of phenolic resin for normal pressure impregnation. After the impregnation is completed, take it out and remove the excess resin on the surface, and then heat and cure. Carbonize the cured impregnated fabric at 900°C for 1 hour to obtain a shaped carbon fiber fabric.

[0028] 2) Dip the shaped carbon fiber fabric into the phenolic resin and then pressurize to 1 MPa for pressurized liquid phase impregnation, remove excess resin on the surface after taking it out, and then heat and cure. The cured impregnated fabric was carbonized at 900°C for 2h, and then heat-treated at 2000°C for 2h to obtain a low-density carbon / carbon composite material with a density of about 0.85g / cm 3 .

[0029] 3) Use graphite powder with a particle size of 5 microns...

Embodiment 2

[0034] 1) The density is 0.9g / cm 3 Stitched carbon fiber flat fabric with a thickness of 15mm. A graphite plate with a sieve hole is used as a profiling tool, and it is fixed by graphite bolts. It is then shaped using a chemical vapor deposition process. Using propane as a precursor, densify at 1000°C for 30 hours to obtain a shaped carbon fiber fabric.

[0035] 2) After the shaped carbon fiber fabric is removed from the profiling tooling, the chemical vapor deposition densification is continued. Using propane as a precursor, densification at 1000°C for 300h, followed by high-temperature heat treatment at 1800°C, a low-density carbon / carbon composite material was obtained with a density of about 1.1g / cm 3 .

[0036]3) Use carbon black as the filling carbon particle, fully disperse it in the resin solution diluted with ethanol to form a suspension with a concentration of about 30g / 100g, and then pressurize and impregnate the carbon black at a pressure of 5MPa Filled into a...

Embodiment 3

[0041] 1) The density is 1.1g / cm 3 Three-way carbon fiber block fabric with a thickness of 50mm. The metal groove with sieve holes on the wall is used as the profiling tool, and there is no obvious gap between the fabric and the tool. Then put it into the ethanol solution of phenolic resin for normal pressure impregnation. After the impregnation is completed, remove the excess resin on the surface, and then heat and cure. Carbonize the cured impregnated fabric at 900°C for 3 hours to obtain a shaped carbon fiber fabric.

[0042] 2) After the shaped carbon fiber fabric is removed from the profiling tooling, the chemical vapor deposition densification is continued. Using propylene as a precursor, after densification at 1000°C for 50 hours, high-temperature heat treatment at 1800°C was performed to obtain a low-density carbon / carbon composite material with a density of about 1.31g / cm 3 .

[0043] 3) Use the carbon fiber powder obtained by grinding (with a particle size of ab...

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Abstract

The invention relates to a rapid preparation method of a low-cost carbon/carbon composite material, and belongs to the field of composite materials. The method is mainly used for reducing the preparation cycle and the cost of the high-density carbon/carbon composite material. A low-density carbon/carbon composite material is formed through compounding fixed carbon fiber fabric in fiber bundles, the carbon fiber bundles are filled with carbon particles to make macro-pores become micro-pores, and low-pressure liquid impregnation carbonization or chemical vapor infiltration and high temperature thermal treatment are carried out to obtain the high-density carbon/carbon composite material. Compared with traditional methods, the preparation method of the carbon/carbon composite material, disclosed in the invention, has the advantages of greatly shortened preparation cycle and greatly reduced preparation cost.

Description

technical field [0001] The invention relates to a rapid preparation method of a low-cost carbon / carbon composite material, which belongs to the field of composite materials. Background technique [0002] Carbon / carbon composites are widely used in high-temperature parts of aerospace vehicles due to their high-temperature resistance, excellent high-temperature mechanical properties, and high-temperature dimensional stability, such as ablation parts such as engine throat liners, nozzles, and aircraft ends. Traditional carbon / carbon composites can be prepared by liquid-phase or gas-phase methods. The liquid-phase method mainly uses pitch or resin as the precursor through repeated pressure impregnation, carbonization and high-temperature heat treatment, while the gas-phase method is mainly for Hydrocarbon organic gases are pyrolyzed at high temperature and deposited into carbon fiber fabrics by chemical vapor infiltration (CVI) technology. Generally, the liquid phase method can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/626
CPCC04B35/626C04B35/83C04B2235/422C04B2235/424C04B2235/425C04B2235/77
Inventor 李同起张中伟梅敏冯志海
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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