CN-122010585-A - Ablation-resistant high-strength carbon Tao Penguan and preparation method thereof

Abstract

The invention discloses an ablation-resistant high-strength carbon Tao Penguan and a preparation method thereof, wherein a carbon spray pipe preform is immersed in an impregnant consisting of organic silicon resin and boron nitride, after the immersion is finished, the carbon spray pipe preform is sequentially solidified and cracked, then the immersion, solidification and cracking are repeatedly circulated to obtain a carbon Tao Penguan blank, the carbon Tao Penguan blank is embedded in silicon powder to be subjected to melt siliconizing to obtain carbon Tao Penguan, the carbon Tao Penguan provided by the invention has an aperture ratio of less than 2 percent and high compactness, the infiltration of an oxidation ablation component into a product can be isolated, a certain amount of SiO 2 is contained in a matrix, the continuous oxidation ablation degree can be relieved, a certain amount of BN can be further enhanced, a certain lubrication effect is exerted on the surface of the product to prevent the product from being washed by high-speed flame jet, and under the cooperation of the aspects, the carbon Tao Penguan can be applied to a severe environment to play a role stably.

Inventors

• CHEN ZHENYU
• LI JINWEI

Assignees

• 湖南世鑫新材料有限公司

Dates

Publication Date

20260512

Application Date

20260210

Claims (10)

1. 1. A preparation method of ablation-resistant high-strength carbon Tao Penguan is characterized in that a carbon spray pipe preform is immersed in an impregnant, after the impregnation is finished, solidification and cracking are sequentially carried out, then repeated circulation is carried out for impregnation-solidification-cracking to obtain a carbon Tao Penguan blank, and the carbon Tao Penguan blank is embedded in silicon powder for fusion siliconizing to obtain carbon Tao Penguan; the impregnant consists of organic silicon resin and boron nitride, wherein the mass ratio of the organic silicon resin to the boron nitride is (5-10:1).
2. 2. The method for preparing ablation-resistant high-strength carbon Tao Penguan as claimed in claim 1, wherein the carbon-carbon spray pipe preform is obtained by performing heat treatment on a carbon fiber preform and then performing chemical vapor deposition on a carbon matrix, and the carbon fiber preform is a carbon fiber three-dimensional woven piece.
3. 3. The method of producing ablation-resistant high-strength carbon Tao Penguan according to claim 2, wherein the density of the carbon fiber preform is 0.50-0.60g/cm 3 .
4. 4. The method for producing ablation-resistant high-strength carbon Tao Penguan according to claim 2, wherein the heat treatment is carried out under a protective atmosphere at a temperature of 1800 to 2200 ℃, The temperature during chemical vapor deposition is 1050-1150 ℃, the pressure is 1-2KPa, and the introduced mixed atmosphere is natural gas, namely propane, nitrogen=2-4:1:2, according to the volume ratio; the density of the carbon-carbon spray pipe preform is 0.8-1.0g/cm 3 .
5. 5. The method for preparing the ablation-resistant high-strength carbon Tao Penguan according to claim 1, wherein: The impregnant is prepared from organic silicon resin, boron nitride=7-8:1; The grain diameter of the boron nitride is 0.5-2.0 mu m.
6. 6. The method for producing ablation-resistant high-strength carbon Tao Penguan according to claim 1, wherein the cracking temperature is 900 to 1300 ℃ and the number of dip-cure-cracking times is 2 to 4.
7. 7. The method of manufacturing an ablation-resistant high strength carbon Tao Penguan, wherein the density of the carbon Tao Penguan blank is 1.20-1.50g/cm 3 .
8. 8. The method of claim 1, wherein the temperature of the fused silica is 1500-1700 ℃ and the time is 0.1-1.0h, and the pressure is less than 1KPa.
9. 9. The method of claim 1, wherein the density of the carbon Tao Penguan is 2.20-2.40g/cm 3 and the aperture ratio is <2%.
10. 10. Carbon Tao Penguan produced by the production method according to any one of claims 1 to 10.

Description

Ablation-resistant high-strength carbon Tao Penguan and preparation method thereof Technical Field The invention belongs to the technical field of aerospace rocket engine parts, and particularly relates to ablation-resistant high-strength carbon Tao Penguan and a preparation method thereof. Background At present, rocket engine jet pipes are made of high-temperature alloy, ceramic, graphite, carbon-carbon and other materials, and a small amount of carbon-ceramic composite materials are used. In the running process of the rocket engine, the maximum temperature of flame jet contacted with the inner wall of the jet pipe can reach 3000 ℃, high-temperature alloys such as metal in conventional materials are difficult to bear the high temperature, ceramic materials are poor in strength and are easy to damage after being subjected to rapid temperature change, graphite and carbon materials can be ablated, meanwhile, the strength of the graphite is also easy to damage after being subjected to rapid temperature change, and the carbon ceramic composite material has the characteristics of high strength, high temperature resistance and the like, but carbon components such as carbon fibers in the composition of the carbon ceramic composite material are easy to ablate to influence the service life. Therefore, improving the ablation of carbon Tao Penguan and improving the strength of the material can greatly improve the service life of the spray pipe, and is a key point for solving the problem at the present stage. Disclosure of Invention A first object of the present invention is to provide a method for preparing carbon Tao Penguan with high strength and resistance to ablation. The method provided by the invention is simple and controllable, and is suitable for industrial production. A second object of the present invention is to provide carbon Tao Penguan prepared by the above-described preparation method. The carbon Tao Penguan provided by the invention has the advantages that the aperture ratio is less than 2%, the compactness is high, the infiltration of oxidation ablation components into the product can be isolated, the continuous oxidation ablation degree can be relieved by containing a certain amount of SiO 2 in the matrix, the ablation resistance of the product can be further enhanced by containing a certain amount of BN, a certain lubrication effect is exerted on the surface of the product to prevent the product from being washed by high-speed flame jet, and under the cooperation of multiple aspects, the carbon Tao Penguan provided by the invention can be stably exerted in a severe environment. In order to achieve the above purpose, the present invention adopts the following technical scheme: The invention relates to a preparation method of ablation-resistant high-strength carbon Tao Penguan, which comprises the steps of immersing a carbon spray pipe preform in an impregnant, sequentially solidifying and cracking after the impregnation is finished, then repeatedly and circularly carrying out impregnation-solidification-cracking to obtain a carbon Tao Penguan blank, embedding the carbon Tao Penguan blank in silicon powder, and carrying out melt siliconizing to obtain carbon Tao Penguan; The impregnant consists of organic silicon resin (polysiloxane) and boron nitride, wherein the mass ratio of the organic silicon resin to the boron nitride is (5-10:1). The carbon Tao Penguan provided by the invention densifies a carbon spray pipe preform by adopting resin composed of organic silicon resin and boron nitride, a certain amount of SiO 2 can be obtained by introducing the organic silicon resin, siO 2 is softened at high temperature, cracks and ablation holes are automatically filled, the continuous oxidation ablation degree can be relieved, the introduced boron nitride micro powder has ultrahigh oxidation resistance, wear resistance and lubricity, the ablation resistance of a product can be further enhanced, a certain lubrication effect is exerted on the surface of the product, the scouring of high-speed flame jet flow to the product is prevented, and finally, the compactness of the product can be improved by high-temperature infiltration and a layer of compact SiSiC film is adhered on the surface of the product. In the invention, the content of the organic silicon resin and the content of the boron nitride need to be effectively controlled, the content of the boron nitride can be influenced by the content of the resin, the permeability of the silicon liquid in the subsequent melt-siliconizing process can be reduced due to the high content of the boron nitride, the oxidation ablation resistance of the product is influenced to a certain extent due to the low content of the boron nitride, meanwhile, the resin content is reduced, the slurry of the resin and the boron nitride becomes viscous, and the infiltration difficulty of the slurry into the pores in the carbon-carbon spray pipe is high, and the effect is poor. In a pre