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Silicified graphite containing three-dimensional network silicon carbide skeleton and preparation method thereof
The invention provides silicified graphite containing a three-dimensional net-shaped silicon carbide skeleton and a preparation method thereof. The preparation method comprises the following steps: preparing a graphite matrix containing three-dimensional net-shaped macroscopic through holes, performing high-temperature graphitization treatment, opening tiny pores of graphite, adding silicon powder, performing liquid-phase siliconizing treatment, and permeating silicon liquid into the macroscopic through holes and the tiny pores to obtain the silicified graphite containing the three-dimensional net-shaped silicon carbide skeleton. And forming a structure in which the macroscopic net-shaped silicon carbide skeleton is connected with the fine silicon carbide branches to obtain the silicified graphite. The macroscopic through holes provide channels for liquid silicon to permeate into graphite tiny air holes, the permeation depth of the liquid silicon in a graphite matrix is increased, the mechanical property of the silicified graphite is regulated and controlled through the three-dimensional net-shaped silicon carbide framework, and the service performance of the silicified graphite is improved.
本发明提供了一种含三维网状碳化硅骨架的硅化石墨及制备方法，包括：制备出含有三维网状宏观通孔的石墨基体，进行高温石墨化处理，打开石墨的微小气孔，加入硅粉进行液相渗硅处理，硅液渗透到宏观通孔和微小气孔中，形成宏观网状碳化硅骨架与细小碳化硅分支相连的结构，得到硅化石墨。本发明中宏观通孔为液硅渗入石墨微小气孔提供了通道，增加了液硅在石墨基体中的渗透深度，通过三维网状碳化硅骨架调控了硅化石墨的力学性能，提高硅化石墨的使役性能。
Silicified graphite containing three-dimensional network silicon carbide skeleton and preparation method thereof
The invention provides silicified graphite containing a three-dimensional net-shaped silicon carbide skeleton and a preparation method thereof. The preparation method comprises the following steps: preparing a graphite matrix containing three-dimensional net-shaped macroscopic through holes, performing high-temperature graphitization treatment, opening tiny pores of graphite, adding silicon powder, performing liquid-phase siliconizing treatment, and permeating silicon liquid into the macroscopic through holes and the tiny pores to obtain the silicified graphite containing the three-dimensional net-shaped silicon carbide skeleton. And forming a structure in which the macroscopic net-shaped silicon carbide skeleton is connected with the fine silicon carbide branches to obtain the silicified graphite. The macroscopic through holes provide channels for liquid silicon to permeate into graphite tiny air holes, the permeation depth of the liquid silicon in a graphite matrix is increased, the mechanical property of the silicified graphite is regulated and controlled through the three-dimensional net-shaped silicon carbide framework, and the service performance of the silicified graphite is improved.
本发明提供了一种含三维网状碳化硅骨架的硅化石墨及制备方法，包括：制备出含有三维网状宏观通孔的石墨基体，进行高温石墨化处理，打开石墨的微小气孔，加入硅粉进行液相渗硅处理，硅液渗透到宏观通孔和微小气孔中，形成宏观网状碳化硅骨架与细小碳化硅分支相连的结构，得到硅化石墨。本发明中宏观通孔为液硅渗入石墨微小气孔提供了通道，增加了液硅在石墨基体中的渗透深度，通过三维网状碳化硅骨架调控了硅化石墨的力学性能，提高硅化石墨的使役性能。
Silicified graphite containing three-dimensional network silicon carbide skeleton and preparation method thereof
含三维网状碳化硅骨架的硅化石墨及制备方法
HOU ZHIBAO (author) / YAO ZHENQIANG (author) / DU HAIFENG (author)
2024-03-15
Patent
Electronic Resource
Chinese
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