Preparation method of carbon-ceramic composite material

Through the sol-gel transformation method driven by ultrasonic standing wave field and DC electric field, the problem of difficult to balance high-temperature densification and structural integrity in the preparation of carbon ceramic composite materials is solved, and zero-stress bonding at the fiber-matrix interface and improved material performance are achieved, and energy consumption is reduced.

CN120365047AActive Publication Date: 2025-07-25SHAOSHAN HENGSHENG MASCH IND CO LTD
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Patent Information

Application Number
CN202510864173.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-26
Publication Date
2025-07-25
Estimated Expiration
2045-06-26

AI Technical Summary

Technical Problem

In the preparation process of existing carbon ceramic composite materials, it is difficult to take into account high-temperature densification and structural integrity, the designability of the microstructure is limited, and the energy consumption is too high. Especially in high-end application scenarios such as aerospace, there are problems of microcrack invasion and stratification failure.

Method used

Ultrasonic standing wave field is used to drive the directional arrangement of chopped carbon fibers to combine sol-gel transformation, and the in-situ curing of the fiber network in the liquid phase environment is used to achieve in-situ curing of the fiber network in a liquid phase environment to avoid thermal stress damage, and to achieve zero stress binding of the fiber-matrix through acoustic transmission characteristics and pH regulation.

Benefits of technology

The complete combination of the fiber-matrix interface under zero stress is achieved, the occurrence of microcracks is avoided, the sintering temperature and energy consumption is reduced, and the microstructure programmability and macro performance stability of the material are improved.

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Abstract

The invention relates to the technical field of preparation of ceramic-based composite materials, and discloses a preparation method of a carbon-ceramic composite material, which comprises the following steps: placing a colloidal suspension containing chopped carbon fibers and ceramic precursor nanoparticles in an ultrasonic standing wave field to directionally arrange a fiber network, synchronously triggering sol-gel transformation to realize in-situ curing of the fiber network, and drying to obtain the carbon-ceramic composite material. And drying and sintering to obtain the composite material. According to the method, zero-stress combination of a fiber-matrix interface is realized in a liquid phase environment through space-time coordination of sound field dynamic arrangement and gel static curing, so that microcracks caused by thermal mismatch in a traditional process are fundamentally avoided; and a direct-current electric field generation trigger mechanism is combined, so that the global consistency of large-size component gelation is ensured, and the material has microstructure programmability and macroscopic performance stability.
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