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Preparation method of fiber-reinforced alumina ceramic-based composite material
The preparation method of the fiber-reinforced aluminum oxide ceramic-based composite material comprises the following steps: S1, carrying out high-temperature heat treatment on a fiber prefabricated part to obtain a to-be-impregnated fiber prefabricated part; s2, the to-be-impregnated fiber prefabricated part is impregnated, dried and cured through silica sol, and a fiber prefabricated part with a silicon dioxide interface layer is obtained; s3, impregnating the fiber preform with the silicon dioxide interface layer by adopting an aluminum oxide precursor solution, drying, curing and pyrolyzing at high temperature to obtain a semi-finished product of the fiber-reinforced aluminum oxide ceramic-based composite material; and S4, the fiber-reinforced alumina ceramic-based composite material semi-finished product is subjected to dipping, drying curing and high-temperature cracking for several times until the weight gain rate of the fiber-reinforced alumina ceramic-based composite material is lower than a preset value compared with the weight of the fiber-reinforced alumina ceramic-based composite material obtained after previous high-temperature cracking, and a fiber-reinforced alumina ceramic-based composite material finished product is obtained. After the composite material prepared by the invention is subjected to 1400 DEG C and 1h high-temperature heat treatment, the strength retention rate is higher than 80%.
提供了一种纤维增强氧化铝陶瓷基复合材料的制备方法，包括：S1、对纤维预制件进行高温热处理，得到待浸渍纤维预制件；S2、采用硅溶胶对待浸渍纤维预制件进行浸渍和烘干固化，得到带有二氧化硅界面层的纤维预制件；S3、采用氧化铝前驱体溶液对带有二氧化硅界面层的纤维预制件进行浸渍、烘干固化和高温裂解，得到纤维增强氧化铝陶瓷基复合材料半成品；S4、对纤维增强氧化铝陶瓷基复合材料半成品进行浸渍‑烘干固化‑高温裂解若干次，直至纤维增强氧化铝陶瓷基复合材料的重量相比前一次高温裂解后的重量增重率低于预设值，得到纤维增强氧化铝陶瓷基复合材料成品。采用本发明制得的复合材料经1400℃，1h高温热处理后，强度保留率高于80％。
Preparation method of fiber-reinforced alumina ceramic-based composite material
The preparation method of the fiber-reinforced aluminum oxide ceramic-based composite material comprises the following steps: S1, carrying out high-temperature heat treatment on a fiber prefabricated part to obtain a to-be-impregnated fiber prefabricated part; s2, the to-be-impregnated fiber prefabricated part is impregnated, dried and cured through silica sol, and a fiber prefabricated part with a silicon dioxide interface layer is obtained; s3, impregnating the fiber preform with the silicon dioxide interface layer by adopting an aluminum oxide precursor solution, drying, curing and pyrolyzing at high temperature to obtain a semi-finished product of the fiber-reinforced aluminum oxide ceramic-based composite material; and S4, the fiber-reinforced alumina ceramic-based composite material semi-finished product is subjected to dipping, drying curing and high-temperature cracking for several times until the weight gain rate of the fiber-reinforced alumina ceramic-based composite material is lower than a preset value compared with the weight of the fiber-reinforced alumina ceramic-based composite material obtained after previous high-temperature cracking, and a fiber-reinforced alumina ceramic-based composite material finished product is obtained. After the composite material prepared by the invention is subjected to 1400 DEG C and 1h high-temperature heat treatment, the strength retention rate is higher than 80%.
提供了一种纤维增强氧化铝陶瓷基复合材料的制备方法，包括：S1、对纤维预制件进行高温热处理，得到待浸渍纤维预制件；S2、采用硅溶胶对待浸渍纤维预制件进行浸渍和烘干固化，得到带有二氧化硅界面层的纤维预制件；S3、采用氧化铝前驱体溶液对带有二氧化硅界面层的纤维预制件进行浸渍、烘干固化和高温裂解，得到纤维增强氧化铝陶瓷基复合材料半成品；S4、对纤维增强氧化铝陶瓷基复合材料半成品进行浸渍‑烘干固化‑高温裂解若干次，直至纤维增强氧化铝陶瓷基复合材料的重量相比前一次高温裂解后的重量增重率低于预设值，得到纤维增强氧化铝陶瓷基复合材料成品。采用本发明制得的复合材料经1400℃，1h高温热处理后，强度保留率高于80％。
Preparation method of fiber-reinforced alumina ceramic-based composite material
一种纤维增强氧化铝陶瓷基复合材料的制备方法
XIANG YANG (Autor:in) / MO CHEN (Autor:in) / LI YONGKANG (Autor:in) / PENG ZHIHANG (Autor:in)
30.06.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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