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Ultrahigh-temperature ceramic-based composite material and preparation method thereof

A technology of ultra-high temperature ceramics and composite materials, which is applied in the field of ultra-high temperature ceramic matrix composite materials and its preparation, can solve the problems of low performance of composite materials, low addition amount of ultra-high temperature ceramic powder, etc., so as to reduce erosion and improve mechanical properties. Effect

Inactive Publication Date: 2019-12-13
AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this process is that the preparation cycle is short, and the disadvantage is that the addition of ultra-high temperature ceramic powder is relatively low, and the performance of the composite material is relatively low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] The invention provides a method for preparing an ultra-high temperature ceramic matrix composite material. The preparation method includes the following steps:

[0041] (1) mixing ceramic powder and thermosetting phenolic resin to prepare slurry;

[0042] In some preferred embodiments, the thermosetting phenolic resin is selected from any one or more of boron phenolic resin, barium phenolic resin, and aminophenolic resin, preferably barium phenolic resin. In some preferred embodiments, the ceramic powder is selected from zirconium carbide powder and / or zirconium boride powder.

[0043] For the concentration of the slurry (that is, the mass percentage of the ceramic powder in the slurry), the present invention is preferably 10% to 70%, which can be any value in this range (including the endpoint value), for example, it can be 10 %, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%. If the powder addition ratio is too high, the viscosity of the ceramic powder s...

Embodiment 1

[0090] (1) Preparation of slurry: Barium phenolic resin is used to blend with ultra-high temperature ceramic powder ZrC powder to prepare phenolic resin slurry. The mass percentage of ultra-high temperature ceramic powder ZrC powder in the phenolic resin slurry is 20%.

[0091] (2) Preparation of prepreg: phenolic resin slurry is used to compound ultra-high temperature ceramic powder prepreg with carbon cloth by hot-melt adhesive film method, wherein the mass content of phenolic resin slurry is 60%.

[0092] (3) Preparation of low-density carbon / carbon green body: Prepared by molding process, the volume fraction of flat fiber is controlled to 40% by the number of layers, the pressing temperature is controlled at 120°C, the curing temperature is 180°C, and the holding time is 4h.

[0093] The molded flat plate was subjected to pyrolysis, which was carried out under nitrogen atmosphere, the heating rate was 0.5°C / min, and the pyrolysis treatment temperature was 800°C.

[0094] (...

Embodiment 2

[0099] (1) Preparation of slurry: the phenolic resin slurry was prepared by blending aminophenol-formaldehyde resin with ultra-high temperature ceramic powder ZrC powder, and the mass percentage of ultra-high temperature ceramic powder ZrC powder in the phenolic resin slurry was 40%.

[0100] (2) With embodiment 1.

[0101] (3) with embodiment 1.

[0102] (4) with embodiment 1.

[0103] (5) with embodiment 1.

[0104] (6) With embodiment 1.

[0105] After testing, the bending strength of the ultra-high temperature ceramic matrix composite is 215MPa.

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Abstract

The invention relates to an ultrahigh-temperature ceramic-based composite material and a preparation method thereof. The preparation method comprises the following steps: mixing ceramic powder and thermosetting phenolic resin to prepare a slurry; compounding the slurry and carbon cloth by adopting a hot melt adhesive film method to obtain a prepreg; laying and stacking the prepreg and preparing amould pressing flat plate; carrying out thermal cracking on the mould pressing flat plate to obtain a carbon / carbon green body; treating the carbon / carbon green body to obtain a carbon / carbon green body with an anti-silicification interface layer; carrying out densification treatment on the carbon / carbon green body with the anti-silicification interface layer by adopting a PIP process to obtain acarbon / carbon matrix; and covering the carbon / carbon matrix with silicon powder, and carrying out melt siliconizing by using a reaction infiltration method to obtain the ultrahigh-temperature ceramic-based composite material. The composite material prepared by the method has excellent mechanical properties, and has substantive benefits in the field of space flight and aviation.

Description

technical field [0001] The invention relates to the technical field of ultra-high temperature ceramic-based composite materials, in particular to an ultra-high-temperature ceramic-based composite material and a preparation method thereof. Background technique [0002] Ultra-high temperature ceramic matrix composites have a series of excellent properties such as high temperature resistance, ablation resistance, and thermal shock resistance, and have broad application prospects in the aerospace field. The preparation process of ultra-high temperature ceramics is generally the precursor impregnation-pyrolysis method and the slurry method. Ultra-high temperature ceramic matrix composites prepared by precursor impregnation-pyrolysis method have excellent ablation resistance, but the preparation cycle is long, the cost is high, and the porosity of the composite is high. The slurry method refers to the use of ultra-high temperature ceramic powder and precursor to prepare a certain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622
CPCC04B35/622C04B35/83C04B2235/428C04B2235/5248C04B2235/616
Inventor 李晓东陈艳武陈鑫阳霍鹏飞于新民赵英民
Owner AEROSPACE INST OF ADVANCED MATERIALS & PROCESSING TECH
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