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C/C-SiC composite material prepared by using silicon-containing aryne resin, and preparation method thereof

A technology of resin composite materials and composite materials, applied in the field of C/C-SiC composite materials and their preparation, can solve the problem of increasing the difficulty and cost of C/C-SiC composite materials, large porosity of composite materials, and carbonization residual rate No problems such as high, achieve the effect of high thermal decomposition residual rate, high ceramization rate, and outstanding thermal stability

Active Publication Date: 2015-12-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The precursor resin is mainly polycarbosilane (PCS). When PCS is directly carbonized at 1250°C, it is easy to foam, and the resulting composite material has a large porosity, and it is difficult to control the porosity, and the preparation cycle is very long.
In addition, the residual rate of PCS carb...

Method used

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  • C/C-SiC composite material prepared by using silicon-containing aryne resin, and preparation method thereof
  • C/C-SiC composite material prepared by using silicon-containing aryne resin, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Fabrication of T300 Carbon Cloth Reinforced C / C-SiC Composites by Impregnation at Atmospheric Pressure

[0044] 1) Preparation of T300 carbon cloth reinforced silicon-containing aryne resin composites

[0045] Take 12 layers of 15×25cm T300 carbon cloth, lay them flat and stack them; take 50g of silicon-containing aryne resin and dissolve it in 93g of tetrahydrofuran to prepare a tetrahydrofuran solution of silicon-containing aryne resin. Immerse the fiber laminate in the solution, take it out and wait for the solvent in the solution to volatilize, put the prepreg in a vacuum oven at 60°C, vacuumize for 2 hours, remove the solvent, place the carbon containing the resin on a flat vulcanizer and pressurize it (6MPa) Curing, the curing process conditions are: 170°C / 2h+210°C / 2h+250°C / 4h to obtain a T300 carbon cloth reinforced silicon-containing aryne resin composite material.

[0046] 2) Carbon cloth reinforced silicon-containing aryne resin composite material car...

Embodiment 2

[0051] Fabrication of Carbon Cloth Reinforced C / C-SiC Composites by Vacuum Impregnating T300

[0052] 1) Preparation of T300 carbon cloth reinforced silicon-containing aryne resin composites

[0053] With the first step in embodiment 1.

[0054] 2) Carbon cloth reinforced silicon-containing aryne resin composite material carbonization

[0055] Same as the second step in Example 1.

[0056] 3) Densification of 2DC / C-SiC composites

[0057] Prepare 45wt% tetrahydrofuran solution of silicon-containing aryne resin, put the porous C / C-SiC composite material vacuum tank prepared in the previous step, vacuumize for 10min, and then inject the tetrahydrofuran solution of silicon-containing aryne resin into the vacuum tank for 10min, Place in a vacuum oven at 60°C for 2 hours to remove the solvent. Then place it in an oven for curing, and the curing process conditions are: 170°C / 2h+210°C / 2h+250°C / 4h. Finally, it was carbonized at 1450°C for 6h. Repeat the densification...

Embodiment 3

[0059] T300 Carbon Cloth Reinforced C / C-SiC Composites Prepared by High Dipping Times

[0060] 1) Preparation of T300 carbon cloth reinforced silicon-containing aryne resin composites

[0061] With the first step in embodiment 1.

[0062] 2) Carbon cloth reinforced silicon-containing aryne resin composite material carbonization

[0063] Same as the second step in Example 1.

[0064] 3) Densification of 2DC / C-SiC composites

[0065] The densification process is the same as the third step in the embodiment. The C / C-SiC composite material with better performance can be obtained by increasing the number of densification times. When the number of densification times reaches 5, the obtained C / C-SiC composite material has a flexural strength of 209.3 MPa and a flexural modulus of 51.7 GPa. Inter-shear strength 19.2MPa, porosity 6.9%, density 1.58g / cm -3 .

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Abstract

The present invention relates to a C/C-SiC composite material prepared by using a silicon-containing aryne resin as a precursor, and a preparation method thereof, wherein the silicon-containing aryne resin is a novel organic-inorganic hybrid resin and has characteristics of solubility and fusibility, heat resistance of the curing resin is significant, and the thermal decomposition residual rate (800 DEG C) is up to more than or equal to 90%. According to the present invention, the silicon-containing aryne resin is adopted as the precursor, and the precursor impregnation method (PIP) is used to prepare the C/C-SiC composite material; the concrete process comprises: impregnating fibers or a fabric with the silicon-containing aryne resin precursor solution or melt to prepare a silicon-containing aryne resin composite material, carrying out high temperature carbonization to obtain a porous C/C-SiC composite material, impregnating the porous C/C-SiC composite material with a silicon-containing aryne resin solution or melt, drying, curing, carrying out carbonization, and repeating the processes 2-6 times to obtain the good performance compact C/C-SiC composite material; and the technology has characteristics of simple impregnation process, simple carbonization process, high compactness efficiency and high material performance, and the C/C-SiC composite material can be used for aerospace and other high-tech areas.

Description

【Technical field】 [0001] The invention relates to the technical field of resins and C / C composite materials, in particular to a C / C-SiC composite material prepared by silicon-containing aryne resin and a preparation method thereof. 【Background technique】 [0002] C / C composite material is a composite material made of carbon fiber reinforced carbon matrix. It has light specific gravity, excellent heat resistance and ablation resistance, and can withstand high temperatures higher than 3000 ° C. It is used in short-term ablation environments. Such as rocket engine nozzles and throat linings used in the aerospace industry. In addition, C / C composites have excellent friction and wear resistance, low friction coefficient and stable performance, making them the best candidate materials for various friction and wear-resistant parts. However, its poor oxidation resistance and high preparation cost greatly limit the popularization and application of C / C composites. [0003] Since th...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/565C04B35/524C04B35/622
Inventor 黄发荣杜磊鲁加荣姜云陈慧高辛浩
Owner EAST CHINA UNIV OF SCI & TECH
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