A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Carbon-carbon crucible with silicon-carbon-nitrogen oxygen-free coating and preparation method of carbon-carbon crucible
The invention belongs to the technical field of materials, and particularly relates to a carbon-carbon crucible with a silicon-carbon-nitrogen oxygen-free coating and a preparation method of the carbon-carbon crucible. The preparation method comprises the following steps: carrying out polysilazane solution dipping treatment on a carbon-carbon crucible substrate, carrying out vacuum heat treatment to form a silicon nitride coating on the surface of the carbon-carbon crucible, spraying silicon powder on the inner surface of the carbon-carbon crucible by adopting supersonic spraying to form a silicon coating, and finally carrying out heat treatment reaction on the silicon nitride coating and the silicon coating to form the silicon coating. A silicon-carbon-nitrogen oxygen-free coating is generated on the inner surface of the crucible through in-situ reaction, the interlayer binding force is firmer, holes of the carbon-carbon crucible can be effectively sealed, the surface of the carbon-carbon crucible is more compact, silicon liquid permeation is prevented, silicon steam is prevented from chemically reacting with the carbon-carbon crucible, the carbon-carbon crucible is effectively prevented from being corroded and damaged, the effect of protecting the carbon-carbon crucible is achieved, and the service life of the carbon-carbon crucible is prolonged. The high-temperature mechanical property and silicification corrosion resistance of the carbon-carbon crucible can be effectively improved, and the service life of the carbon-carbon crucible is prolonged.
本发明属于材料技术领域，具体涉及一种具有硅碳氮无氧涂层的碳碳坩埚及其制备方法。本发明通过对碳碳坩埚基体进行聚硅氮烷溶液浸渍处理，经真空热处理在碳碳坩埚表面形成氮化硅涂层，然后采用超声速喷涂对碳碳坩埚的内表面喷涂硅粉，形成硅涂层，最后氮化硅涂层和硅涂层通过热处理反应，在坩埚内表面原位反应生成硅碳氮无氧涂层，其层间结合力更为牢固，能对碳碳坩埚进行有效封孔，使其表面更为致密，防止硅液渗透，阻止硅蒸汽与碳碳坩埚发生化学反应，有效防止碳碳坩埚被腐蚀破坏，起到保护碳碳坩埚的作用，可有效提高碳碳坩埚的高温力学性能和抗硅化腐蚀性能，延长碳碳坩埚的使用寿命。
Carbon-carbon crucible with silicon-carbon-nitrogen oxygen-free coating and preparation method of carbon-carbon crucible
The invention belongs to the technical field of materials, and particularly relates to a carbon-carbon crucible with a silicon-carbon-nitrogen oxygen-free coating and a preparation method of the carbon-carbon crucible. The preparation method comprises the following steps: carrying out polysilazane solution dipping treatment on a carbon-carbon crucible substrate, carrying out vacuum heat treatment to form a silicon nitride coating on the surface of the carbon-carbon crucible, spraying silicon powder on the inner surface of the carbon-carbon crucible by adopting supersonic spraying to form a silicon coating, and finally carrying out heat treatment reaction on the silicon nitride coating and the silicon coating to form the silicon coating. A silicon-carbon-nitrogen oxygen-free coating is generated on the inner surface of the crucible through in-situ reaction, the interlayer binding force is firmer, holes of the carbon-carbon crucible can be effectively sealed, the surface of the carbon-carbon crucible is more compact, silicon liquid permeation is prevented, silicon steam is prevented from chemically reacting with the carbon-carbon crucible, the carbon-carbon crucible is effectively prevented from being corroded and damaged, the effect of protecting the carbon-carbon crucible is achieved, and the service life of the carbon-carbon crucible is prolonged. The high-temperature mechanical property and silicification corrosion resistance of the carbon-carbon crucible can be effectively improved, and the service life of the carbon-carbon crucible is prolonged.
本发明属于材料技术领域，具体涉及一种具有硅碳氮无氧涂层的碳碳坩埚及其制备方法。本发明通过对碳碳坩埚基体进行聚硅氮烷溶液浸渍处理，经真空热处理在碳碳坩埚表面形成氮化硅涂层，然后采用超声速喷涂对碳碳坩埚的内表面喷涂硅粉，形成硅涂层，最后氮化硅涂层和硅涂层通过热处理反应，在坩埚内表面原位反应生成硅碳氮无氧涂层，其层间结合力更为牢固，能对碳碳坩埚进行有效封孔，使其表面更为致密，防止硅液渗透，阻止硅蒸汽与碳碳坩埚发生化学反应，有效防止碳碳坩埚被腐蚀破坏，起到保护碳碳坩埚的作用，可有效提高碳碳坩埚的高温力学性能和抗硅化腐蚀性能，延长碳碳坩埚的使用寿命。
Carbon-carbon crucible with silicon-carbon-nitrogen oxygen-free coating and preparation method of carbon-carbon crucible
一种具有硅碳氮无氧涂层的碳碳坩埚及其制备方法
JIANG JIE (author) / JIA LINTAO (author) / SUN ZHULIN (author) / IKEZAWA SATOSHI (author)
2023-11-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2024
| European Patent Office | 2024
Preparation method of carbon/carbon/silicon carbide composite material crucible
| European Patent Office | 2021