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Ceramic-based composite material and preparation method thereof
The invention discloses a preparation method of a ceramic-based composite material. The preparation method comprises the following steps: preparing a fiber preform by adopting continuous carbon fibers as a reinforcement; the obtained fiber preform is placed in a high-temperature-resistant vacuum sintering furnace to be subjected to an isothermal chemical vapor infiltration process, and a preform with a pyrolytic carbon interface layer is obtained; carrying out primary densification on the prefabricated body by adopting an isothermal chemical vapor infiltration process, and introducing a silicon carbide matrix to obtain a Cf/SiC green body; introducing a pyrolytic carbon matrix into the Cf/SiC green body by adopting an isothermal chemical vapor infiltration process; further introducing an outer-layer resin carbon matrix into the second-stage green body by adopting a pressure dipping-cracking process; and with silicon powder as a raw material, carrying out siliconizing treatment on the third-stage green body by adopting a gas-phase siliconizing process to finally prepare the Cf/C-SiC composite material. The preparation period is greatly shortened and the preparation cost is reduced while the mechanical property of the composite material is ensured, so that the preparation process is a ceramic-based composite material preparation process which is easy to realize industrialization.
本发明公开了一种陶瓷基复合材料制备方法，制备步骤为：采用连续碳纤维作为增强体制备纤维预制体；将得到的纤维预制体置于耐高温真空烧结炉中进行等温化学气相渗积工艺，得到带有热解碳界面层的预制体；采用等温化学气相渗积工艺对预制体进行初步增密，引入碳化硅基体，得到Cf/SiC坯体；采用等温化学气相渗积工艺向Cf/SiC坯体内引入热解碳基体；采用加压浸渍‑裂解工艺向二级坯体进一步引入外层树脂碳基体；以硅粉为原料，采用气相渗硅工艺对三级坯体进行渗硅处理，最终制得Cf/C‑SiC复合材料。在保证复合材料力学性能的同时，大幅缩短制备周期，降低制备成本，是易于实现产业化的陶瓷基复合材料制备工艺。
Ceramic-based composite material and preparation method thereof
The invention discloses a preparation method of a ceramic-based composite material. The preparation method comprises the following steps: preparing a fiber preform by adopting continuous carbon fibers as a reinforcement; the obtained fiber preform is placed in a high-temperature-resistant vacuum sintering furnace to be subjected to an isothermal chemical vapor infiltration process, and a preform with a pyrolytic carbon interface layer is obtained; carrying out primary densification on the prefabricated body by adopting an isothermal chemical vapor infiltration process, and introducing a silicon carbide matrix to obtain a Cf/SiC green body; introducing a pyrolytic carbon matrix into the Cf/SiC green body by adopting an isothermal chemical vapor infiltration process; further introducing an outer-layer resin carbon matrix into the second-stage green body by adopting a pressure dipping-cracking process; and with silicon powder as a raw material, carrying out siliconizing treatment on the third-stage green body by adopting a gas-phase siliconizing process to finally prepare the Cf/C-SiC composite material. The preparation period is greatly shortened and the preparation cost is reduced while the mechanical property of the composite material is ensured, so that the preparation process is a ceramic-based composite material preparation process which is easy to realize industrialization.
本发明公开了一种陶瓷基复合材料制备方法，制备步骤为：采用连续碳纤维作为增强体制备纤维预制体；将得到的纤维预制体置于耐高温真空烧结炉中进行等温化学气相渗积工艺，得到带有热解碳界面层的预制体；采用等温化学气相渗积工艺对预制体进行初步增密，引入碳化硅基体，得到Cf/SiC坯体；采用等温化学气相渗积工艺向Cf/SiC坯体内引入热解碳基体；采用加压浸渍‑裂解工艺向二级坯体进一步引入外层树脂碳基体；以硅粉为原料，采用气相渗硅工艺对三级坯体进行渗硅处理，最终制得Cf/C‑SiC复合材料。在保证复合材料力学性能的同时，大幅缩短制备周期，降低制备成本，是易于实现产业化的陶瓷基复合材料制备工艺。
Ceramic-based composite material and preparation method thereof
一种陶瓷基复合材料及其制备方法
LUO RUIYING (author) / YANG XIAOTIAN (author) / HUANG PENG (author)
2024-09-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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