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Preparation method of SiC-ZrC segmented ceramic matrix composite spray pipe

A composite material and ceramic-based technology, which is applied in the field of preparation of ceramic-based composite material nozzles, can solve the problems of lack of high-temperature ablation resistance, reduction of strength and other mechanical properties, and structural weakening, etc., to achieve short preparation cycle, Guaranteed strength and low cost effect

Active Publication Date: 2014-04-16
TAICANG PAIOU TECH CONSULTING SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, C / C composites are easily oxidized at high temperatures. Oxidation will increase the pores and weaken the structure, resulting in a rapid decrease in strength and other mechanical properties, and the oxidation weight loss is 1%, and its strength drops by 10%. In the environment (such as solid rocket motor throat lining material with high impact to mass ratio, missile nose cone, etc.) C / C composite materials do not have the required high temperature ablation resistance.
Therefore, the problem of high temperature anti-oxidation and ablation of C / C composites is the bottleneck to realize its practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) A two-dimensional carbon fiber prefabricated body is prepared by laminating plain weave carbon cloth;

[0017] (2) CVI is used to deposit pyrolytic C on the carbon fiber preform, and the porous C / C preform is made by high-temperature graphitization treatment;

[0018] (3) Put the porous C / C prefabricated body into anhydrous ethanol for ultrasonic vibration cleaning twice, and dry it in a blast drying oven at 100°C for 3 hours until the quality remains unchanged;

[0019] (4) Put the dried porous C / C preform into the graphite crucible;

[0020] (5) Put Si on the surface of the straight section and skirt of the porous C / C preform, embed it with SiC powder, put it into a tube furnace, and heat up to 1500 °C at a heating rate of 8 °C / min. ℃, keep warm for 2 hours and then cool with the furnace;

[0021] (6) Put Zr on the surface of the middle throat of the porous C / C preform, put it into the tube furnace, the temperature rise rate of the tube furnace is 8°C / min, heat ...

Embodiment 2

[0024] (1) A two-dimensional carbon fiber prefabricated body is prepared by laminating plain weave carbon cloth;

[0025] (2) CVI is used to deposit pyrolytic C on the carbon fiber preform, and the porous C / C preform is made by high-temperature graphitization treatment;

[0026] (3) Put the porous C / C prefabricated body into absolute ethanol for ultrasonic vibration cleaning for 3 times, and dry it in a blast drying oven at 120°C for 4 hours until the quality remains unchanged;

[0027] (4) Put the dried porous C / C preform into the graphite crucible;

[0028] (5) Put Si on the surface of the straight section and the skirt of the porous C / C preform, embed it with SiC powder, put it into a tube furnace, and heat up to 1600 °C at a heating rate of 10 °C / min. ℃, keep warm for 3 hours and then cool with the furnace;

[0029] (6) Put Zr on the surface of the middle throat of the porous C / C prefabricated body, put it into the tube furnace, the temperature rise rate of the tube furn...

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Abstract

A preparation method of a SiC-ZrC segmented ceramic matrix composite spray pipe is characterized in that the ceramic matrix composite comprises a porous C / C composite framework, a SiC coating and a ZrC coating. A CVI (chemical vapor infiltration) method is adopted to prepare a porous C / C precast body which is placed into absolute ethyl alcohol for ultrasonic oscillation and cleaning and placed into a graphite crucible after drying; Si is placed on the surfaces of a straight section and a skirt part of the porous C / C precast body, the porous C / C precast body with Si is then embedded by SiC powder, and the porous C / C precast body embedded by the Sic powder is placed into a tube furnace and heated to a high temperature; Zr is placed at the skirt section of the porous C / C precast body, and the porous C / C precast body with Zr is then placed into the tube furnace and heated to the high temperature; a melt is infiltrated into the porous body through capillary force and reacts to obtain the SiC-ZrC segmented ceramic matrix composite spray pipe. Obtained ceramic matrix composite has the advantages of light weight, high strength, low porosity, high antioxidant and ablation-resistant capacities, short preparation period and low cost.

Description

technical field [0001] The invention relates to a method for preparing a resin-based composite material nozzle, in particular to a method for preparing a SiC-ZrC segmented ceramic-based composite material nozzle. Background technique [0002] Carbon / carbon (hereinafter referred to as C / C) composites have become the preferred material for thermal structural parts of advanced aircraft due to their low density and excellent high-temperature mechanical properties, especially the characteristics that the mechanical properties do not decrease but increase at high temperatures. However, C / C composites are easily oxidized at high temperatures. Oxidation will increase the pores and weaken the structure, resulting in a rapid decrease in strength and other mechanical properties, and the oxidation weight loss is 1%, and its strength drops by 10%. In the environment (such as solid rocket motor throat lining material with high impact to mass ratio, missile nose cone, etc.) C / C composite m...

Claims

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Application Information

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IPC IPC(8): C04B35/83C04B35/565C04B35/56C04B35/622
Inventor 陈照峰余盛杰
Owner TAICANG PAIOU TECH CONSULTING SERVICE
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