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Method for preparing self-healing silicon carbide ceramic-based composite material

A technology of composite materials and silicon carbide, which is applied in the field of preparation of silicon carbide ceramic matrix composite materials, can solve the problems of weakening the self-healing and anti-oxidation ability of ceramic matrix composite materials, and it is difficult to ensure uniform dispersion of active powder fillers, etc. The effect of strong healing and anti-oxidation ability, short preparation cycle and low preparation cost

Active Publication Date: 2013-02-06
BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the method of active powder filler, on the one hand, it is difficult to ensure that the active powder filler can be uniformly dispersed in the organic precursor impregnation solution; Self-healing and anti-oxidation ability of materials

Method used

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preparation example Construction

[0020] The present invention will be described in further detail below. A method for preparing a self-healing silicon carbide ceramic matrix composite material, characterized in that the preparation steps are as follows:

[0021] 1. Preparation of silicon carbide fiber prefabricated body: The silicon carbide fiber prefabricated body is prepared with continuous silicon carbide fiber as raw material, and its structural form is: 2D fiber layup, 2.5D fiber weaving, 3D fiber weaving or 3D fiber acupuncture felt;

[0022] 2. Preparation of precursor impregnation solution: use polycarbosilane and trimethylaminoborane polymer as solute, and xylene as solvent to prepare precursor impregnation solution. The solute accounts for 45% to 60% by weight of the precursor impregnation solution. Polycarbosilane accounts for 60% to 85% by weight of the solute;

[0023] 3. Prepare the silicon carbide fiber preform interface layer: place the silicon carbide fiber preform in a chemical vapor depos...

Embodiment 1

[0035] 1. Preparation of silicon carbide fiber prefabricated body: a 3D fiber-woven silicon carbide fiber prefabricated body is prepared by using continuous silicon carbide fiber as a raw material.

[0036] 2. Prepare the precursor impregnation solution: use polycarbosilane and trimethylaminoborane polymer as the solute, and xylene as the solvent to prepare the precursor impregnation solution. The solute accounts for 60% by weight of the precursor impregnation solution. Polycarbosilane Accounting for 55% by weight of solute;

[0037] 3. Prepare the silicon carbide fiber preform interface layer: place the silicon carbide fiber preform in a chemical vapor deposition furnace, use propane as the gas source, prepare the pyrolytic carbon interface layer of the silicon carbide fiber preform, and the process conditions of chemical vapor deposition are : Propane flow 2L / min; N 2 Flow rate 2L / min; furnace pressure ≤ 2KPa; temperature 1000°C; deposition time 10h;

[0038] 4. Shaping: Put...

Embodiment 2

[0049] 1. Preparation of silicon carbide fiber prefabricated body: a 3D fiber-woven silicon carbide fiber prefabricated body is prepared using continuous silicon carbide fiber as a raw material.

[0050] 2. Prepare the precursor impregnation solution: use polycarbosilane and trimethylaminoborane polymer as the solute, and xylene as the solvent to prepare the precursor impregnation solution. The solute accounts for 60% by weight of the precursor impregnation solution. Polycarbosilane Accounting for 66.7% by weight of solute;

[0051] 3. Prepare the silicon carbide fiber preform interface layer: place the silicon carbide fiber preform in a chemical vapor deposition furnace, use propane as the gas source, prepare the pyrolytic carbon interface layer of the silicon carbide fiber preform, and the process conditions of chemical vapor deposition are : Propane flow 2L / min; N 2 Flow rate 2L / min; furnace pressure 2KPa; temperature 1000°C; deposition time 5h;

[0052] 4. Shaping: Put t...

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Abstract

The invention belongs to a preparation technology of a silicon carbide ceramic-based composite material and relates to the improvement on a method for preparing the self-healing silicon carbide fiber-reinforced ceramic-based composite material. The method is characterized by comprising the following steps of: preparing silicon carbide fiber precast body, preparing precursor steeping liquor; preparing silicon carbide fiber precast body interface layer; molding, vacuum steeping, drying, hot mold pressing, and cracking; steeping-drying-cracking with a die; and steeping-drying-cracking without the die. The method for preparing the self-healing silicon carbide ceramic-based composite material disclosed by the invention has the advantages that the process is simple, requirements on the device are low, the preparation period is short, the preparation cost is low, and the self-healing oxidation capacity resistance is strong.

Description

technical field [0001] The invention belongs to the preparation technology of silicon carbide ceramic matrix composite material, and relates to the improvement of the preparation method of self-healing silicon carbide fiber reinforced silicon carbide ceramic matrix composite material. Background technique [0002] Silicon carbide fiber reinforced silicon carbide ceramic matrix composites (SiC f / SiC) is prepared by adding silicon carbide fibers to silicon carbide ceramic materials as the second phase, which can absorb capacity through mechanisms such as crack deflection, fiber breakage and pull-out during the fracture process, and enhance the strength and toughness of the material. SiC f / SiC has the advantages of high specific strength, high specific modulus, high hardness, wear resistance, oxidation resistance, corrosion resistance, and good high temperature stability. It has become a new generation of ideal high temperature structural materials in the fields of aerospace...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/565C04B35/622
Inventor 邱海鹏焦健李秀倩王宇邹豪
Owner BEIJING AERONAUTICAL MFG TECH RES INST
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