Process for preparing self-sealing silicon carbide ceramic based composite material

A technology of composite materials and silicon carbide, which is applied in the field of preparation of self-healing silicon carbide ceramic matrix composite materials, can solve the problems of easy peeling, long time, complicated process, etc., and achieves improved thermal oxidation life, strong oxidation resistance, The effect of simple process

A technology of composite materials and silicon carbide, which is applied in the field of preparation of self-healing silicon carbide ceramic matrix composite materials, can solve the problems of easy peeling, long time, complicated process, etc., and achieves improved thermal oxidation life, strong oxidation resistance, The effect of simple process

CN101503305AActive Publication Date: 2009-08-12NORTHWESTERN POLYTECHNICAL UNIV
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Use 2D plain carbon cloth with brand T300 as the reinforcement of the composite material, and cut the 2D fiber cloth to a specification of 250mm×125mm;

[0025] (2) Laminate 2-dimensional carbon fiber cloth and shape it with a graphite mold. The thickness of the fiber prefabricated body is 2.3mm;

[0026] (3) Infiltrating the carbon fiber preform into the pyrolytic carbon interface layer, the thickness of which is 100nm;

[0027] (4) High temperature treatment is performed on the carburized preform, the treatment temperature is 1700°C, the treatment atmosphere is Ar gas, and the treatment time is 3.0 hours;

[0028] (5) Put the preform after high temperature heat treatment into the chemical vapor infiltration furnace to infiltrate the silicon carbide substrate, the infiltration temperature: 900°C, the holding time: 150h, the pressure in the furnace: 2kPa, the precursor is CH 3 SiCl 3 ;

[0029] (6) Continue to infiltrate the boron carbide matrix, infiltration tem...

Embodiment 2

[0033] (1) Use the 3D carbon fiber with the brand name T300 as the reinforcement of the composite material, and weave the 3D fiber into a length and width of 250mm×125mm and a thickness of 4.5mm;

[0034] (2) The 3-dimensional carbon fiber braid is directly fixed and formed with a graphite mold;

[0035] (3) Infiltrating the carbon fiber preform into the pyrolytic carbon interface layer, the thickness of which is 300nm;

[0036] (4) High temperature treatment is performed on the carburized preform, the treatment temperature is 2100°C, the treatment atmosphere is Ar gas, and the treatment time is 1.0 hour;

[0037] (5) Put the preform after high temperature heat treatment into the chemical vapor infiltration furnace to infiltrate the silicon carbide substrate, the infiltration temperature: 1050°C, the holding time: 100h, the pressure in the furnace: 2kPa, the precursor is CH 3 SiCl 3 ;

[0038] (6) Continue to infiltrate boron carbide matrix, infiltration temperature: 1050°C...

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Abstract

The invention relates to a method for manufacturing a self-healing silicon carbide ceramic matrix composite. The method comprises the following steps: preparing fiber preform; filtrating a pyrolytic carbon interface layer by chemical gas phase; carrying out thermal treatment on the interface layer; infiltrating silicon carbide and boron carbide substrate by chemical gas phase alternately; and depositing three silicon carbide coatings by the chemical gas phase. The method has strong designability, simple process and good repeatability. The ceramic matrix composite manufactured by the method has good high temperature resistance and oxidation resistance, has excellent mechanical performance and thermal performance, and can meet the use requirement of a sealing strip / an adjustment sheet, an interior cone and other components of a high thrust-weight ratio aeroengine.

Description

technical field [0001] The invention relates to a preparation method of a self-healing silicon carbide ceramic matrix composite material, in particular to a fiber reinforced multilayer (SiC-BC x ) n Method for the manufacture of self-healing silicon carbide ceramic matrix composites. Background technique [0002] Fiber-reinforced silicon carbide ceramic matrix composite (CMC-SiC) is a new generation of high-temperature-resistant, low-density, high-performance thermal structural materials, which can effectively increase the operating temperature of the engine and reduce the structural weight. application prospects. The density of CMC-SiC is 2~2.5g / cm 3 , is 1 / 4 to 1 / 10 of high-temperature metal structural materials, and the potential maximum service temperature is 1650°C, which is 400-500°C higher than high-temperature metal structural materials. In addition, CMC-SiC also overcomes the shortcomings of high brittleness and poor reliability of structural ceramics, poor oxid...

Claims

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Application Information

Patent Timeline
12 Aug 2009
Publication
CN101503305A
IPC
C04B35/83; C04B35/565; C04B35/622
Inventors
刘永胜; 张立同