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Microstructure design and performance control method for preparing carbon-ceramic-based composite materials based on liquid silicon melt infiltration method

A technology of composite material and control method, which is applied in the field of preparation of carbon ceramic matrix composite material, and achieves the effects of simple process, easy industrial production and strong design.

Active Publication Date: 2013-10-02
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no report on the regulation of the structure and properties of the final carbon ceramic matrix composites by processing carbon fibers.

Method used

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  • Microstructure design and performance control method for preparing carbon-ceramic-based composite materials based on liquid silicon melt infiltration method
  • Microstructure design and performance control method for preparing carbon-ceramic-based composite materials based on liquid silicon melt infiltration method
  • Microstructure design and performance control method for preparing carbon-ceramic-based composite materials based on liquid silicon melt infiltration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Cut the T300 carbon fiber cloth into a size of 100×70×60mm, place the cut fiber in a high-temperature graphite furnace, vacuumize the furnace and fill it with nitrogen protection. The nitrogen pressure is 5×10 2 Pa, heat the graphite furnace to 600 ° C for 1 hour, and then take out the fiber cloth when it is naturally cooled to room temperature.

[0031] 2. Prepare resin-saturated glue according to the mass ratio of phenolic resin to absolute ethanol of 1:0.8, and let it stand in the air until the dissolution process is completed.

[0032] 3. Immerse the carbon fiber obtained in step 1 into the resin glue obtained in step 2, take it out to dry after being fully impregnated, and then stack up to 20 layers continuously in the mold, apply a pressure of 2 MPa, and then place it in an oven , heat at 130°C for 6 hours to complete curing, demould after completion, then place it in a muffle furnace, heat at 200°C for 24 hours to complete curing, and obtain a fiber-reinforced...

Embodiment 2

[0036] In step 1, the heat treatment temperature of T300 fiber cloth is 900°C, and the others are the same as in embodiment 1.

Embodiment 3

[0038] In step 1, the heat treatment temperature of the T300 fiber cloth is 1500° C., and the others are the same as in Example 1.

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Abstract

The invention provides a microstructure design and performance control method for preparing carbon-ceramic-based composite materials based on the liquid silicon melt infiltration method. The method comprises the following steps: (a) two-dimensional carbon fiber cloths are treated to obtain two-dimensional carbon fiber cloths with different surface activities, (b) the two-dimensional carbon fiber cloths obtained from a are soaked into a phenolic resin gel solution fully, and dried, the obtained fiber cloths are then overlaid in dies continuously, after being overlaid, the fiber cloths are subjected to curing and post-curing to prepare fiber-reinforced green bodies with different fiber / resin bonding strengths, (c) the fiber-reinforced green bodies obtained from b are placed in a high-temperature graphite furnace, heated to above 900 DEG C under nitrogen condition, and subjected to pyrolysis to prepare carbon / carbon preforms with different microstructures, (d) the carbon / carbon performs obtained from c are placed in the high-temperature graphite furnace, and subjected to liquid silicon melt infiltration at the temperature of 1450-1550 DEG C to prepare carbon-ceramic-based composite materials with different microstructures, matrix structural components and performances.

Description

technical field [0001] The invention relates to a preparation method of a carbon-ceramic-based composite material, in particular to a microstructure design and performance control method for preparing a carbon-ceramic-based composite material based on a liquid silicon infiltration method. Background technique [0002] Compared with carbon / carbon composites, carbon-ceramic composites mainly differ in that part of the carbon matrix in carbon / carbon composites is replaced by a ceramic matrix with excellent oxidation resistance, thereby maintaining the mechanical properties of carbon / carbon composites. Basically, the oxidation resistance of the matrix is ​​significantly improved. Therefore, in addition to a series of excellent properties such as high temperature resistance, high specific strength, high specific modulus, low thermal expansion coefficient, and excellent high temperature thermodynamic stability of carbon / carbon composite materials, carbon ceramic matrix composites ...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/622
Inventor 沙建军代吉祥张兆甫张玉翠
Owner DALIAN UNIV OF TECH
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