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A platform for research: civil engineering, architecture and urbanism
Carbon fiber toughened ceramic matrix composite material and preparation method thereof
The invention relates to a carbon fiber toughened ceramic matrix composite material and a preparation method thereof. The method comprises the following steps: depositing a pyrolytic carbon interface layer on the surface of carbon fiber contained in a carbon fiber preform through a chemical vapor deposition method to obtain a porous C/C substrate; soaking the porous C/C substrate in a metal salt aqueous solution for pressure impregnation, then drying and sintering, and repeating the step 1-20 times to obtain a first modified substrate of which the carbon fiber surface is coated with a pyrolytic carbon interface layer and a metal oxide layer; the first modified matrix is subjected to carbon thermal reduction, and a second modified matrix with the carbon fiber surface coated with a pyrolytic carbon interface layer and a metal carbide layer is obtained; and taking a ceramic precursor as a reactant, and reacting with the second modified matrix through an impregnation pyrolysis method to prepare the carbon fiber toughened ceramic matrix composite material. The problem that the performance of the ceramic-based composite material fails due to the fact that the carbon fibers are prone to oxidation is effectively solved, and the prepared ceramic-based composite material still has very high tensile strength in a high-temperature aerobic environment.
本发明涉及一种碳纤维增韧的陶瓷基复合材料及其制备方法。所述方法：通过化学气相沉积法在碳纤维预制体包含的碳纤维表面沉积热解碳界面层，得到多孔C/C基体；将多孔C/C基体浸泡在金属盐水溶液中加压浸渍，再进行干燥与烧结，重复该步骤1至20次，得到碳纤维表面包覆热解碳界面层和金属氧化物层的第一改性基体；将第一改性基体进行碳热还原，得到碳纤维表面包覆热解碳界面层和金属碳化物层的第二改性基体；以陶瓷前驱体为反应物，通过浸渍裂解法与第二改性基体反应，制得碳纤维增韧的陶瓷基复合材料。本发明有效解决了碳纤维易氧化而导致陶瓷基复合材料性能失效的问题，本发明制得的陶瓷基复合材料在高温有氧环境下仍具有很高的拉伸强度。
Carbon fiber toughened ceramic matrix composite material and preparation method thereof
The invention relates to a carbon fiber toughened ceramic matrix composite material and a preparation method thereof. The method comprises the following steps: depositing a pyrolytic carbon interface layer on the surface of carbon fiber contained in a carbon fiber preform through a chemical vapor deposition method to obtain a porous C/C substrate; soaking the porous C/C substrate in a metal salt aqueous solution for pressure impregnation, then drying and sintering, and repeating the step 1-20 times to obtain a first modified substrate of which the carbon fiber surface is coated with a pyrolytic carbon interface layer and a metal oxide layer; the first modified matrix is subjected to carbon thermal reduction, and a second modified matrix with the carbon fiber surface coated with a pyrolytic carbon interface layer and a metal carbide layer is obtained; and taking a ceramic precursor as a reactant, and reacting with the second modified matrix through an impregnation pyrolysis method to prepare the carbon fiber toughened ceramic matrix composite material. The problem that the performance of the ceramic-based composite material fails due to the fact that the carbon fibers are prone to oxidation is effectively solved, and the prepared ceramic-based composite material still has very high tensile strength in a high-temperature aerobic environment.
本发明涉及一种碳纤维增韧的陶瓷基复合材料及其制备方法。所述方法：通过化学气相沉积法在碳纤维预制体包含的碳纤维表面沉积热解碳界面层，得到多孔C/C基体；将多孔C/C基体浸泡在金属盐水溶液中加压浸渍，再进行干燥与烧结，重复该步骤1至20次，得到碳纤维表面包覆热解碳界面层和金属氧化物层的第一改性基体；将第一改性基体进行碳热还原，得到碳纤维表面包覆热解碳界面层和金属碳化物层的第二改性基体；以陶瓷前驱体为反应物，通过浸渍裂解法与第二改性基体反应，制得碳纤维增韧的陶瓷基复合材料。本发明有效解决了碳纤维易氧化而导致陶瓷基复合材料性能失效的问题，本发明制得的陶瓷基复合材料在高温有氧环境下仍具有很高的拉伸强度。
Carbon fiber toughened ceramic matrix composite material and preparation method thereof
一种碳纤维增韧的陶瓷基复合材料及其制备方法
YANG LIANGWEI (author) / HAO NAIRONG (author) / YANG TONG (author) / FENG SHIJIE (author) / LIU WEI (author) / LIU JUNPENG (author) / SUN TONGCHEN (author)
2023-03-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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