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Rare earth oxide modified Cf/ZrC-SiC composite material and preparation method thereof
According to the rare earth oxide modified Cf/ZrC-SiC composite material and the preparation method thereof, Y2O3 and Yb2O3 are uniformly dispersed and introduced into the Cf/ZrC-SiC composite material in proportion, so that the stability of a ZrO2 high-temperature phase is improved, the volatilization of SiO2 in an ultrahigh-temperature environment is inhibited, and the oxidation ablation resistance of the Cf/ZrC-SiC composite material is improved. The specific preparation method comprises the following steps: firstly, carrying out high-temperature heat treatment on a carbon fiber preform, then carrying out PyC interface deposition by adopting a chemical vapor deposition process, and then uniformly dispersing and introducing rare earth oxide into the preform by adopting ZrC and rare earth oxide mixed slurry preparation and high-frequency vibration-assisted mixed slurry injection modes; and drying to form a ceramic body. The rare earth oxide modified Cf/ZrC-SiC composite material is prepared by performing SiC matrix densification and post-high-temperature heat treatment on a formed ceramic green body and finally performing SiC surface coating by adopting chemical vapor deposition, and has the advantages of high density, small thermal expansion coefficient, excellent oxidation resistance, excellent ablation resistance and the like.
一种稀土氧化物改性Cf/ZrC‑SiC复合材料及其制备方法，通过将Y2O3和Yb2O3按比例均匀分散引入到Cf/ZrC‑SiC复合材料内部，提高了ZrO2高温相的稳定性和抑制了SiO2在超高温环境下的挥发，改善了Cf/ZrC‑SiC复合材料的抗氧化烧蚀性能。具体制备方法为：首先将碳纤维预制体进行高温热处理，之后采用化学气相沉积工艺进行PyC界面沉积，然后采用ZrC和稀土氧化物混合浆料配制和高频振动辅助混合浆料注入方式将稀土氧化物均匀分散引入到预制体内，干燥处理后形成陶瓷坯体。对形成陶瓷坯体进行SiC基体致密化和后高温热处理，最后采用化学气相沉积进行SiC表面涂层得到了稀土氧化物改性Cf/ZrC‑SiC复合材料，具有高密度、热膨胀系数小，优异抗氧化和烧蚀性能等优点。
Rare earth oxide modified Cf/ZrC-SiC composite material and preparation method thereof
According to the rare earth oxide modified Cf/ZrC-SiC composite material and the preparation method thereof, Y2O3 and Yb2O3 are uniformly dispersed and introduced into the Cf/ZrC-SiC composite material in proportion, so that the stability of a ZrO2 high-temperature phase is improved, the volatilization of SiO2 in an ultrahigh-temperature environment is inhibited, and the oxidation ablation resistance of the Cf/ZrC-SiC composite material is improved. The specific preparation method comprises the following steps: firstly, carrying out high-temperature heat treatment on a carbon fiber preform, then carrying out PyC interface deposition by adopting a chemical vapor deposition process, and then uniformly dispersing and introducing rare earth oxide into the preform by adopting ZrC and rare earth oxide mixed slurry preparation and high-frequency vibration-assisted mixed slurry injection modes; and drying to form a ceramic body. The rare earth oxide modified Cf/ZrC-SiC composite material is prepared by performing SiC matrix densification and post-high-temperature heat treatment on a formed ceramic green body and finally performing SiC surface coating by adopting chemical vapor deposition, and has the advantages of high density, small thermal expansion coefficient, excellent oxidation resistance, excellent ablation resistance and the like.
一种稀土氧化物改性Cf/ZrC‑SiC复合材料及其制备方法，通过将Y2O3和Yb2O3按比例均匀分散引入到Cf/ZrC‑SiC复合材料内部，提高了ZrO2高温相的稳定性和抑制了SiO2在超高温环境下的挥发，改善了Cf/ZrC‑SiC复合材料的抗氧化烧蚀性能。具体制备方法为：首先将碳纤维预制体进行高温热处理，之后采用化学气相沉积工艺进行PyC界面沉积，然后采用ZrC和稀土氧化物混合浆料配制和高频振动辅助混合浆料注入方式将稀土氧化物均匀分散引入到预制体内，干燥处理后形成陶瓷坯体。对形成陶瓷坯体进行SiC基体致密化和后高温热处理，最后采用化学气相沉积进行SiC表面涂层得到了稀土氧化物改性Cf/ZrC‑SiC复合材料，具有高密度、热膨胀系数小，优异抗氧化和烧蚀性能等优点。
Rare earth oxide modified Cf/ZrC-SiC composite material and preparation method thereof
一种稀土氧化物改性Cf/ZrC-SiC复合材料及其制备方法
LUO RUIYING (author) / SUN SHOUYE (author) / HUANG PENG (author)
2024-12-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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