Preparation method of carbon fiber reinforced ultra-high temperature ceramic matrix composite material

Abstract

The invention relates to a preparation method of carbon fiber reinforced ultra-high temperature ceramic matrix composite material, belonging to the field of ceramic matrix composite material. The present invention firstly impregnates the soluble precursor containing ultra-high temperature ceramic constituent elements into the composite material, and then synthesizes the ultra-high temperature ceramic phase in situ through the reaction between various substances at high temperature, so as to increase the content of the ultra-high temperature ceramic phase in the matrix of the composite material and the purpose of distribution uniformity. A fiber-reinforced ultra-high temperature ceramic matrix composite material with high content of ultra-high temperature ceramics and uniform distribution is obtained by further densifying the composite material. The method has the advantages of simple process, strong repeatability and simple operation.

Description

Preparation method of carbon fiber reinforced ultra-high temperature ceramic matrix composite material technical field The invention relates to a preparation method of carbon fiber reinforced ultra-high temperature ceramic matrix composite material, belonging to the field of ceramic matrix composite material. Background technique With the development of aerospace technology, the flight speed of aerospace vehicles will be greatly improved. Since the hypersonic vehicle will be subjected to very strong aerodynamic heating during flight, its surface temperature will reach more than 2000°C. Seeking ultra-high temperature resistant materials that can work stably in high temperature environments above 2000 °C has become the research goal of material workers. Although Cf / SiC composites have excellent properties of high temperature resistance, thermal shock resistance, chemical corrosion resistance and high thermal conductivity, when the temperature is higher than 1650 °C, the oxi...

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Problems solved by technology

However, due to the impeding effect of the fiber bundles on the ultra-high temperature ceramic particles in the slurry during impregnation, the introduced ultra-high temperature ceramic particles mainly exist in the larger inter-bundle pores, while the pores in the fiber bundles are mainly filled by the precursor cracking products , resulting in a low volume fraction of the introduced ultra-high temperature ceramic phase and uneven distribution in the composite

[Tang, S. F.; Deng, J.Y.; Wang, S.J.; Liu, W.C.; Yang, K., Ablation behaviors of ultra-high temperature ceramic composites, Materials Science and Engineering A 2007, 465, 1-7.; Wang, Z. ; Dong, S.M.; Zhang, X.Y.; Zhou, H.J.; Wu, D.X.; , 3434-3436.; Li Hongbu, Cheng Laifei, Zhang Litong, W.Y., Oxidation analysis of 2D C / ZrC-SiC composites with different coating structures in CH4combustion gas environment Ceramics International 2009, 2009.35(6): 2277-2282; Li, H.B., et al., Fabrication of 2D C / ZrC-SiC composite and its structural evolution under high-temperature treatment up to 1800 degrees C.Ceramics International, 2009.35(7): 2831-2836] When the ultra-high temperature ceramic phase in the composite When the content in the matrix is ​​low and the distribution is uneven, it may lead to insignificant improvement in the high temperature performance of the composite material and inconsistent high temperature performance in different regions of the composite material

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