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Method for preparing oxidation-resistant ceramic-matrix composite material capable of resisting 1,200 DEG C

A composite material and ceramic-based technology, which is applied in the field of preparation of ceramic-based composite materials, can solve the problems of complex preparation process, long cycle, easy peeling off of anti-oxidation coating, etc., and achieves low preparation cost, excellent mechanical properties and simple process. Effect

Active Publication Date: 2017-11-17
AVIC COMPOSITES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The anti-oxidation coating prepared by this process generally has complex preparation process and long cycle, especially the problem that the bonding strength between the coating and the substrate does not match. When the SiC / SiC composite component is subjected to multiple thermal shocks, gas erosion or When interfered, the anti-oxidation coating is easy to fall off and loses the protective effect on the material

Method used

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  • Method for preparing oxidation-resistant ceramic-matrix composite material capable of resisting 1,200 DEG C
  • Method for preparing oxidation-resistant ceramic-matrix composite material capable of resisting 1,200 DEG C

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preparation example Construction

[0024] 1. Preparation of silicon carbide fiber preform: using continuous silicon carbide fiber as raw material, silicon carbide fiber preform is prepared by weaving;

[0025] 2. Preparation of the interface layer: place the silicon carbide fiber preform in a pyrolytic carbon chemical vapor deposition furnace, the pyrolytic carbon source is propane, the temperature is 950 ° C ~ 1100 ° C, the furnace pressure is between 2KPa ~ 4KPa, and the flow rate is 1000ml / min~3000ml / min, deposition time 4h~10h;

[0026] 3. The configuration of the polymer precursor solution: one is to use polycarbosilane as the solute and xylene as the solvent, and the solute accounts for 40-60% of the weight percentage of the precursor solution to configure the polycarbosilane solution; the other is to use polycarbosilane and polyborazine polymer are solutes, xylene is used as a solvent, the solute accounts for 40-60% by weight of the precursor solution, and the polyborazine polymer accounts for 30-50% by...

Embodiment 1

[0035] 1. Preparation of silicon carbide fiber preforms: using continuous silicon carbide fibers as raw materials, silicon carbide fiber preforms are prepared through a 2.5-dimensional weaving process;

[0036] 2. Preparation of the interface layer: place the silicon carbide fiber preform in a pyrolytic carbon chemical vapor deposition furnace, the pyrolytic carbon source is propane, the temperature is 1000°C, the furnace pressure is 2KPa, the flow rate is 2000ml / min, and the deposition time is 4h;

[0037] 3. The configuration of the polymer precursor solution: one is to use polycarbosilane as the solute and xylene as the solvent, and the solute accounts for 50% of the weight percentage of the precursor solution to configure the polycarbosilane solution; the other is to use polycarbosilane Silane and polyborazine polymer are solutes, xylene is used as solvent, solute accounts for 50% of the weight percentage of the precursor solution, polyborazine polymer accounts for 30% of s...

Embodiment 2

[0046] 1. Preparation of silicon carbide fiber prefabricated body: using continuous silicon carbide fiber as raw material, a silicon carbide fiber prefabricated body is prepared through a 3D weaving process;

[0047] 2. Preparation of the interface layer: place the silicon carbide fiber preform in a pyrolytic carbon chemical vapor deposition furnace, the pyrolytic carbon source is propane, the temperature is 1000°C, the furnace pressure is 2KPa, the flow rate is 2000ml / min, and the deposition time is 10h;

[0048] 3. The configuration of the polymer precursor solution: one is to use polycarbosilane as the solute and xylene as the solvent, and the solute accounts for 60% of the weight percentage of the precursor solution to configure the polycarbosilane solution; the other is to use polycarbosilane Silane and polyborazine polymer are solutes, xylene is used as solvent, solute accounts for 60% of the weight percentage of the precursor solution, polyborazine polymer accounts for 4...

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Abstract

The invention belongs to preparation technologies for continuous fiber reinforced ceramic matrix composite materials and particularly relates to a method for preparing an oxidation-resistant ceramic-matrix composite material capable of resisting 1,200 DEG C. According to the method, a continuous fiber reinforced ceramic matrix composite material is prepared by adopting a polymer impregnation and pyrolysis process, an adopted impregnant is a xylene solution of polycarbosilane or a xylene solution of a polycarbosilane and polyborazine mixed precursor, the solubility of the polycarbosilane and the polyborazine in xylene is relatively high, and thus, a polymer precursor can be uniformly dispersed in a solution, so that the maintaining of uniformity of composition and a structure of a ceramic matrix, formed after the precursor is subjected to pyrolysis, is facilitated. According to the method, the obtaining of the continuous fiber reinforced ceramic matrix composite material with excellent mechanical properties is facilitated; and then, the polycarbosilane and polyborazine mixed precursor is subjected to vacuum impregnating and pyrolysis, and the high-temperature stability of the material in oxidizing environments at the temperature of 1,200 DEG C is improved by making full use of a synergistic anti-oxidation action of an oxidizing ingredient, i.e., boron trioxide of the ceramic matrix and borosilicate.

Description

technical field [0001] The invention belongs to the preparation technology of continuous fiber reinforced ceramic matrix composite material, in particular to a preparation method of ceramic matrix composite material resistant to oxidation at 1200°C. Background technique [0002] Continuous silicon carbide fiber reinforced silicon carbide ceramic matrix composite material (SiC / SiC composite material) refers to the introduction of SiC fiber into the SiC ceramic matrix as a reinforcing phase, and then forms a reinforced phase and a dispersed phase with SiC fiber, with SiC ceramic as the matrix phase and continuous phase composites. The structure and composition characteristics of SiC / SiC composite materials determine that this type of material inherits and retains the advantages of silicon carbide ceramic materials such as high temperature resistance, oxidation resistance, wear resistance, and corrosion resistance. Therefore, SiC / SiC composites have the characteristics of low ...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/84C04B35/565
CPCC04B35/565C04B35/806C04B2235/3409C04B2235/483C04B2235/486C04B2235/5244C04B2235/96
Inventor 陈明伟邱海鹏谢巍杰刘善华
Owner AVIC COMPOSITES
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