A ceramic-based composite high-temperature absorbing material and its preparation method and application

By introducing multi-layer interfaces and bismuth layered ceramic phases into the ceramic matrix composite material and combining with the ceramic matrix, the problems of poor stability and insufficient mechanical strength of existing high-temperature absorbing materials at high temperatures are solved, and a ceramic matrix composite high-temperature absorbing material that maintains wave absorption and mechanical properties in a high-temperature environment are realized.

CN119462171BActive Publication Date: 2025-03-21WUZHEN LABORATORY
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Patent Information

Application Number
CN202510048909.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-01-13
Publication Date
2025-03-21
Estimated Expiration
2045-01-13

AI Technical Summary

Technical Problem

The existing high-temperature electromagnetic wave absorbing materials have poor stability in high-temperature environments, reduced wave absorption performance, and insufficient mechanical strength, which cannot meet the strength and stability requirements in high-temperature environments.

Method used

Ceramic matrix composite materials are used, including fiber prefabricated bodies, multi-layer interfaces, bismuth layered structural ceramic phases and ceramic substrates. By depositing PyC, BN and SiC interfaces, and injecting wave absorbing phase slurry and ceramic matrix precursors into the fiber prefabricated bodies. After multiple impregnation and anaerobic thermal cracking treatments, a ceramic matrix composite high-temperature absorbing material with excellent mechanical properties and high temperature stability is formed.

Benefits of technology

Maintain good wave absorption performance at high temperatures, combines excellent mechanical properties and thermal stability, and is suitable for heat resistance protection, aerospace, radar wave absorption, stealth technology, electronic warfare and communication shielding.

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Abstract

The present invention belongs to the field of composite materials, and in particular, relates to a ceramic-based composite high-temperature absorbing material and its preparation method and application. The components of the composite material provided by the present invention include: a fiber preform, a multilayer interface, an absorbing phase and a ceramic matrix; the fiber preform is a structural bearing member of the composite material; the multilayer interface is deposited on the surface of the fiber preform, including a PyC interface, a BN interface and a SiC interface; the absorbing phase is dispersed inside the fiber preform, and is a bismuth layered structure ceramic phase; the ceramic matrix is ​​filled inside and on the surface of the fiber preform and the multilayer interface, and its components are one or more of SiC, Si3N4 and SiCN. The composite material provided by the present invention can maintain good absorbing performance at high temperatures, and has excellent mechanical properties and thermal stability, and has broad application prospects in the fields of heat-resistant protection, aerospace, radar absorbing, stealth technology, electronic warfare, communication shielding, etc.
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