Preparation method of carbon fiber toughened quartz ceramic based composite material

A technology of quartz ceramics and composite materials, which is applied in the field of preparation of carbon fiber toughened quartz ceramic matrix composite materials, can solve the problems of low density, high cost and complicated process of composite materials, and achieve the purpose of increasing crystallization temperature, improving processing performance, The effect of enhancing density

Active Publication Date: 2019-09-03
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, carbon fiber-reinforced quartz ceramic matrix composites prepared by hot pressing and sintering short carbon fibers or unidirectional continuous carbon fibers still cannot completely get rid of the brittleness of ceramics, and their reliability for complex-shaped load-bearing special-shaped structures still needs to be improved; carbon fiber three-dimensional fabrics through Carbon fiber-reinforced quartz ceramic matrix composites have been prepared by impregnation, grouting, gel casting, etc., but there are still some shortcomings, such as: complex process, high cost, low density of composite materials, etc.

Method used

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  • Preparation method of carbon fiber toughened quartz ceramic based composite material
  • Preparation method of carbon fiber toughened quartz ceramic based composite material
  • Preparation method of carbon fiber toughened quartz ceramic based composite material

Examples

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Embodiment 1

[0041] This embodiment provides a method for preparing a carbon fiber toughened quartz ceramic matrix composite material, comprising the following steps:

[0042] (1) Fiber preform pretreatment

[0043] Choose a 2.5D structural carbon fiber preform with a bulk density of 0.45g / cm 3 , with a fiber volume fraction of 30%, pre-impregnated in 5% silica sol, and heat-treated at 800 ° C for 1 h under a nitrogen protective atmosphere.

[0044] (2) Preparation of quartz slurry

[0045] Preparation of quartz composite slurry: Add 1000g of quartz powder and silicon nitride powder with a mass fraction of 3% of the slurry into a ball mill tank, add 1200g of silica sol, add 3ml of cyclohexanone as a dispersant, and use alumina balls as a grinding Medium, ball milled for 90 hours, and the viscosity of the slurry was controlled at 100MPa·S.

[0046] (3) Preparation of green body

[0047] Put the carbon fiber prefabricated body of acupuncture structure into the mold, seal the mold, fix th...

Embodiment 2

[0052] The features of this embodiment that are the same as those of Embodiment 1 will not be described in detail. The features of this embodiment that are different from Embodiment 1 are:

[0053] This embodiment provides a method for preparing a carbon fiber toughened quartz ceramic matrix composite material, comprising the following steps:

[0054] (1) Fiber preform pretreatment

[0055] Choose needle-punched carbon fiber preform with a bulk density of 0.5g / cm 3 , with a fiber volume fraction of 40%, pre-impregnated in 8% silica sol, and then heat-treated at 850°C for 1.5h under a nitrogen protective atmosphere.

[0056] (2) Preparation of quartz slurry

[0057] Preparation of quartz composite slurry: Add 1100g of quartz powder and silicon nitride powder with a mass fraction of 4% of the slurry into a ball mill jar, add 1400g of silica sol, and add 4ml of cyclohexanone as a dispersant. Using alumina balls as the grinding medium, the ball milled for 95 hours, and the visc...

Embodiment 3

[0064] The features of this embodiment that are the same as those of Embodiment 1 will not be described in detail. The features of this embodiment that are different from Embodiment 1 are:

[0065] This embodiment provides a method for preparing a carbon fiber toughened quartz ceramic matrix composite material, comprising the following steps:

[0066] (1) Fiber preform pretreatment

[0067] Choose a fine-woven puncture structure carbon fiber prefabricated body with a bulk density of 0.57g / cm 3 , with a fiber volume fraction of 50%, pre-impregnated in 10% silica sol, and then heat-treated at 900°C for 2h under a nitrogen protective atmosphere.

[0068] (2) Preparation of quartz slurry

[0069] Preparation of quartz composite slurry: Add 1200g of quartz powder and silicon nitride powder with a mass fraction of 5% of the slurry into a ball mill tank, add 1500g of silica sol, add 5ml of cyclohexanone as a dispersant, and use alumina balls as a grinding Medium, ball mill for 100...

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Abstract

The invention relates to a preparation method of a carbon fiber toughened quartz ceramic based composite material. The preparation method comprises following steps: fiber prefabricated body pretreatment; quartz material slurry preparation; and biscuit preparation, wherein, a pre-treated fiber prefabricated body is introduced into a mould, vacuum treatment is carried out, the quartz material slurryis introduced into a mould through siphon for vibration treatment, a curing agent is added, after curing of the quartz material slurry, thermal insulation treatment is carried out in a vacuum furnace, vacuum pumping is carried out, silica sol repeat dipping is carried out, and hot pressing sintering is carried out so as to obtain a biscuit. According to the carbon fiber toughened quartz ceramic based composite material, the density, the tensile strength, and the bending strength of quartz composite material are improved.

Description

technical field [0001] The invention relates to the technical field of ceramic matrix composite materials, in particular to a preparation method of carbon fiber toughened quartz ceramic matrix composite materials. Background technique [0002] Quartz is an abundant substance in nature, and it is widely used in the fields of electronic communication, semiconductor, catalyst carrier and optical device. At the same time, because it also has extremely low thermal conductivity, thermal shock resistance, ablation resistance, good chemical stability and excellent dielectric properties, it has been widely valued in the field of aerospace vehicle materials, especially at the end of missiles. on the antenna window. However, due to the low mechanical properties of quartz, its further application is limited. In the past few decades, people have introduced BN, Si 3 N 4 , AlN particles and mullite fibers to reinforce the quartz matrix in order to obtain good mechanical properties. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/14C04B35/645
CPCC04B35/803C04B35/14C04B35/645C04B2235/3873C04B2235/5252C04B2235/5248
Inventor 邵长涛王洪升韦其红朱保鑫栾强王重海翟萍
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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