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Porous ultrahigh-temperature ceramic and preparation method of modified C/SiC composite material of porous ultrahigh-temperature ceramic
The invention discloses a porous ultra-high-temperature ceramic and a preparation method of a modified C/SiC composite material of the porous ultra-high-temperature ceramic. The preparation method comprises the following steps: (1) preparing a solution 1 from resorcinol, a formaldehyde aqueous solution and sodium carbonate; preparing a solution 2 from metal alkoxide and n-butyl alcohol; preparing a solution 3 from deionized water, ethanol and nitric acid; mixing the solution 1, the solution 2 and the solution 3 to prepare metal-containing sol; (2) carrying out curing and heat treatment on the metal-containing sol to obtain the porous ultra-high-temperature ceramic; and (3) dipping the C/SiC ceramic-based composite material in the metal-containing sol, carrying out hydrothermal reaction, drying and carrying out heat treatment to obtain the composite material. The porous ultrahigh-temperature ceramic with high porosity is prepared by a sol-gel method; on one hand, fine regulation and control of a pore structure of a ceramic-based composite material can be realized; and on the other hand, through fine regulation and control of pores, the wetting power, the material densification, the matrix distribution uniformity and the ablation resistance of subsequent liquid phase infiltration into the porous C/SiC are improved.
本发明公开了一种多孔超高温陶瓷及其改性C/SiC复合材料的制备方法。其制备方法包括以下步骤：(1)取间苯二酚、甲醛水溶液与碳酸钠制备溶液1；金属醇盐与正丁醇制备溶液2；去离子水、乙醇和硝酸制备溶液3；然后将溶液1、2和3混合制得含金属溶胶；(2)含金属溶胶经固化和热处理制得多孔超高温陶瓷；(3)C/SiC陶瓷基复合材料于含金属溶胶中浸渍、水热反应、烘干和热处理，制得复合材料。本发明通过溶胶‑凝胶法制备了一种高孔隙率的多孔超高温陶瓷，一方面可以实现陶瓷基复合材料孔隙结构的精细调控；另一方面，通过孔隙的精细调控，提升后续液相渗入多孔C/SiC的润湿动力，材料致密化、基体分布均匀性及抗烧蚀性能。
Porous ultrahigh-temperature ceramic and preparation method of modified C/SiC composite material of porous ultrahigh-temperature ceramic
The invention discloses a porous ultra-high-temperature ceramic and a preparation method of a modified C/SiC composite material of the porous ultra-high-temperature ceramic. The preparation method comprises the following steps: (1) preparing a solution 1 from resorcinol, a formaldehyde aqueous solution and sodium carbonate; preparing a solution 2 from metal alkoxide and n-butyl alcohol; preparing a solution 3 from deionized water, ethanol and nitric acid; mixing the solution 1, the solution 2 and the solution 3 to prepare metal-containing sol; (2) carrying out curing and heat treatment on the metal-containing sol to obtain the porous ultra-high-temperature ceramic; and (3) dipping the C/SiC ceramic-based composite material in the metal-containing sol, carrying out hydrothermal reaction, drying and carrying out heat treatment to obtain the composite material. The porous ultrahigh-temperature ceramic with high porosity is prepared by a sol-gel method; on one hand, fine regulation and control of a pore structure of a ceramic-based composite material can be realized; and on the other hand, through fine regulation and control of pores, the wetting power, the material densification, the matrix distribution uniformity and the ablation resistance of subsequent liquid phase infiltration into the porous C/SiC are improved.
本发明公开了一种多孔超高温陶瓷及其改性C/SiC复合材料的制备方法。其制备方法包括以下步骤：(1)取间苯二酚、甲醛水溶液与碳酸钠制备溶液1；金属醇盐与正丁醇制备溶液2；去离子水、乙醇和硝酸制备溶液3；然后将溶液1、2和3混合制得含金属溶胶；(2)含金属溶胶经固化和热处理制得多孔超高温陶瓷；(3)C/SiC陶瓷基复合材料于含金属溶胶中浸渍、水热反应、烘干和热处理，制得复合材料。本发明通过溶胶‑凝胶法制备了一种高孔隙率的多孔超高温陶瓷，一方面可以实现陶瓷基复合材料孔隙结构的精细调控；另一方面，通过孔隙的精细调控，提升后续液相渗入多孔C/SiC的润湿动力，材料致密化、基体分布均匀性及抗烧蚀性能。
Porous ultrahigh-temperature ceramic and preparation method of modified C/SiC composite material of porous ultrahigh-temperature ceramic
一种多孔超高温陶瓷及其改性C/SiC复合材料的制备方法
CHENG SU (author) / DENG YINGYING (author) / LU TONG (author) / LIU GUANGHAI (author)
2024-04-26
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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