Preparation method of ceramic-based composite material

A composite material and ceramic-based technology, applied in the field of composite materials, can solve the problems of unfavorable carbon fiber reinforcement, large changes in matrix density, and prolonged densification cycle, and achieve the effect of shortening production cycle, improving density and high volume content

Inactive Publication Date: 2019-05-03
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the immersion cracking process, when the organic precursor molecules are transformed into inorganic ceramics by pyrolysis, the density of the matrix changes greatly before and after cracking, the volume shrinks greatly, and a large amount of small molecule gases are released

Method used

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  • Preparation method of ceramic-based composite material
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  • Preparation method of ceramic-based composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A preparation method of C / SiC-ZrC ceramic matrix composite material 1, comprising the following steps:

[0035] (1) Preparation of carbon fiber preform: make the bulk density 0.79g / cm 3 A carbon fiber braid with an open porosity of 53.21% was cleaned by ultrasonic waves for 15 minutes, and dried at 100±10°C.

[0036] (2) The polycarbosilane precursor solid and xylene are mixed and stirred according to a mass ratio of 6:4 to make a polycarbosilane precursor solution, and then ZrC powder and SiC powder are weighed, wherein the sum of ZrC powder and SiC powder is 0.10 times the mass of the polycarbosilane precursor solution, the volume ratio of ZrC powder and SiC powder is 4:1, add the weighed polycarbosilane precursor solution, ZrC powder, and SiC powder together into the ball mill jar, weigh Add 0.25% of the dispersant to the total mass of the slurry into the ball mill tank, and perform ball milling for 40 minutes.

[0037] Wherein, the dispersant is: Disponer 912, whi...

Embodiment 2

[0044] A preparation method of C / SiC-ZrC ceramic matrix composite material 2, comprising the following steps:

[0045] (1) Preparation of carbon fiber preform: make the bulk density 0.79g / cm 3 A carbon fiber braid with an open porosity of 53.21% was cleaned by ultrasonic waves for 15 minutes, and dried at 100±10°C.

[0046] (2) The polycarbosilane precursor solid and xylene are mixed and stirred according to a mass ratio of 6:4 to make a polycarbosilane precursor solution, and then ZrC powder and SiC powder are weighed, wherein the sum of ZrC powder and SiC powder is 0.15 times the mass of the polycarbosilane precursor solution, the volume ratio of ZrC powder and SiC powder is 4:1, add the weighed polycarbosilane precursor solution, ZrC powder, and SiC powder together into the ball mill jar, weigh Add 0.35% of the dispersant to the total mass of the slurry into the ball mill tank, and perform ball milling for 40 minutes.

[0047] Wherein, the dispersant is: Disponer 912, which...

Embodiment 3

[0054] A preparation method of C / SiC-ZrC ceramic matrix composite material 3, comprising the following steps:

[0055] (1) Preparation of carbon fiber preform: make the bulk density 0.79g / cm 3 A carbon fiber braid with an open porosity of 53.21% was cleaned by ultrasonic waves for 15 minutes, and dried at 100±10°C.

[0056] (2) The polycarbosilane precursor solid and xylene are mixed and stirred according to a mass ratio of 6:4 to make a polycarbosilane precursor solution, and then ZrC powder and SiC powder are weighed, wherein the sum of ZrC powder and SiC powder is 0.20 times the mass of the polycarbosilane precursor solution, the volume ratio of ZrC powder and SiC powder is 4:1, add the weighed polycarbosilane precursor solution, ZrC powder, and SiC powder together into the ball mill jar, weigh Add 0.30% of the dispersant to the total mass of the slurry into the ball mill tank, and perform ball milling for 40 minutes.

[0057] Wherein, the dispersant is: Disponer 912, whi...

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Abstract

The invention belongs to the technical field of composite materials, and discloses a preparation method of a ceramic-based composite material. The invention aims to solve the technical problems that in the impregnation cracking process of the prior art, when pyrolysis conversion of organic precursor molecules into inorganic ceramics is performed, since large change of the density of a matrix before and after cracking and large volume shrinkage occur, and a large amount of small molecular gas is released, prolongation of the densification period of the material is resulted. The preparation method mainly comprises slurry preparation, slurry impregnation, vacuum solidification, high-temperature pyrolysis and other steps. Through the method, the density of the material is improved, and the production cycle is shortened.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a method for preparing composite materials, in particular to a method for preparing ceramic matrix composite materials, and is especially suitable for the preparation of C / SiC-ZrC ultra-high temperature ceramic matrix composite materials. Background technique [0002] C / SiC ceramic composite material is a fiber-reinforced ceramic matrix composite material, which combines the advantages of carbon fiber and SiC matrix, with low density, high strength, high temperature resistance, ablation resistance, erosion resistance, high hardness, high toughness and high Wear resistance and other characteristics have been widely used in the fields of atmospheric reentry, transatmospheric flight and rocket propulsion system. The maximum temperature for long-term use of C / SiC ceramic composites is 1650°C, and the short-term use temperature does not exceed 1800°C. To further increase its...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/52C04B35/56C04B35/571
Inventor 刘瑞祥姜凯王艳艳杨芳红李涵徐鸿照周长灵
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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