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Near-zero-expansion C/Si3N4-SiC composite material as well as preparation method and application thereof
The invention discloses a near-zero-expansion C/Si3N4-SiC composite material as well as a preparation method and application thereof, and relates to the technical field of ceramic-based composite materials. The composite material comprises a carbon fiber reinforced silicon nitride-based porous composite material and a silicon carbide matrix coated on the surface of the carbon fiber reinforced silicon nitride-based porous composite material, the carbon fiber reinforced silicon nitride-based porous composite material comprises a carbon fiber preform formed by weaving carbon fiber bundles, a pyrolytic carbon interface layer is deposited on a carbon fiber bundle in the carbon fiber preform, and the pyrolytic carbon interface layer is also coated with a silicon nitride matrix. According to the method, the deposition time of the silicon nitride substrate is regulated and controlled, so that the silicon nitride substrate completely wraps the carbon fiber bundle, dispersively distributed microcracks are formed in the fiber bundle, and near-zero expansion is realized.
本发明公开了一种近零膨胀C/Si3N4‑SiC复合材料及其制备方法和应用，涉及陶瓷基复合材料技术领域。所述复合材料包括碳纤维增强氮化硅基多孔复合材料，以及所述碳纤维增强氮化硅基多孔复合材料表面包覆的碳化硅基体；所述碳纤维增强氮化硅基多孔复合材料包括由碳纤维束编织而成的碳纤维预制体；所述碳纤维预制体中碳纤维束上沉积有热解碳界面层，所述热解碳界面层上还包覆有氮化硅基体。本发明通过调控氮化硅基体的沉积时间，使氮化硅基体完全将碳纤维束包裹，在纤维束内形成弥散分布的微裂纹，实现了近零膨胀。
Near-zero-expansion C/Si3N4-SiC composite material as well as preparation method and application thereof
The invention discloses a near-zero-expansion C/Si3N4-SiC composite material as well as a preparation method and application thereof, and relates to the technical field of ceramic-based composite materials. The composite material comprises a carbon fiber reinforced silicon nitride-based porous composite material and a silicon carbide matrix coated on the surface of the carbon fiber reinforced silicon nitride-based porous composite material, the carbon fiber reinforced silicon nitride-based porous composite material comprises a carbon fiber preform formed by weaving carbon fiber bundles, a pyrolytic carbon interface layer is deposited on a carbon fiber bundle in the carbon fiber preform, and the pyrolytic carbon interface layer is also coated with a silicon nitride matrix. According to the method, the deposition time of the silicon nitride substrate is regulated and controlled, so that the silicon nitride substrate completely wraps the carbon fiber bundle, dispersively distributed microcracks are formed in the fiber bundle, and near-zero expansion is realized.
本发明公开了一种近零膨胀C/Si3N4‑SiC复合材料及其制备方法和应用，涉及陶瓷基复合材料技术领域。所述复合材料包括碳纤维增强氮化硅基多孔复合材料，以及所述碳纤维增强氮化硅基多孔复合材料表面包覆的碳化硅基体；所述碳纤维增强氮化硅基多孔复合材料包括由碳纤维束编织而成的碳纤维预制体；所述碳纤维预制体中碳纤维束上沉积有热解碳界面层，所述热解碳界面层上还包覆有氮化硅基体。本发明通过调控氮化硅基体的沉积时间，使氮化硅基体完全将碳纤维束包裹，在纤维束内形成弥散分布的微裂纹，实现了近零膨胀。
Near-zero-expansion C/Si3N4-SiC composite material as well as preparation method and application thereof
一种近零膨胀C/Si3N4-SiC复合材料及其制备方法和应用
FAN XIAOMENG (author) / WANG XUTENG (author) / DENG JIWEN (author) / ZHAO DONGLIN (author) / CHEN CHAO (author)
2024-12-27
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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