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Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Gel connection method of pressureless sintered silicon carbide
The invention belongs to the technical field of silicon carbide ceramic material processing, and particularly relates to a gel connection method of pressureless sintered silicon carbide. According to the gel connection method for pressureless sintering of silicon carbide, the first mold and the second mold are used for preparing a silicon carbide product in a pouring connection and pressureless sintering mode. According to the method disclosed by the invention, gel connection is more scientifically and reasonably carried out according to a slurry curing shrinkage-time curve, connection is completed in a reaction period by utilizing gel casting, induction is carried out again, and an oxygen inhibition layer is eliminated; meanwhile, a two-zone temperature control drying and pressureless sintering process is adopted, according to the characteristic that heat flow is always upward, temperature control of an upper zone is set to generate certain lag compared with that of a lower zone, temperature uniformity is achieved, stress is released at the same time, shrinkage of all zones is consistent, a connecting layer is uniform, a finished product is free of defects, and the method has the advantages of being easy to operate and simple in process. The method disclosed by the invention is high in efficiency and simple to operate, and has a huge application prospect in connection of large-size silicon carbide ceramic parts.
本发明属于碳化硅陶瓷材料加工技术领域，具体涉及一种无压烧结碳化硅的凝胶连接方法。所述无压烧结碳化硅的凝胶连接方法，使用第一模具和第二模具通过浇注连接、无压烧结的方式制备碳化硅产品。本发明的方法根据浆料固化收缩‑时间曲线，更科学合理地进行凝胶连接，利用凝胶注模在反应期完成连接并再次诱导，消除氧阻聚层；同时采用二区控温的干燥和无压烧结工艺，根据热流始终向上的特性，设定上区控温较下区产生一定的滞后，实现温度均匀，同时释放应力，使各区收缩一致和连接层均匀，使成品无缺陷，并具有操作容易，过程简单的特点。本发明的方法效率高、操作简单，在大尺寸碳化硅陶瓷件的连接上有巨大的应用前景。
Gel connection method of pressureless sintered silicon carbide
The invention belongs to the technical field of silicon carbide ceramic material processing, and particularly relates to a gel connection method of pressureless sintered silicon carbide. According to the gel connection method for pressureless sintering of silicon carbide, the first mold and the second mold are used for preparing a silicon carbide product in a pouring connection and pressureless sintering mode. According to the method disclosed by the invention, gel connection is more scientifically and reasonably carried out according to a slurry curing shrinkage-time curve, connection is completed in a reaction period by utilizing gel casting, induction is carried out again, and an oxygen inhibition layer is eliminated; meanwhile, a two-zone temperature control drying and pressureless sintering process is adopted, according to the characteristic that heat flow is always upward, temperature control of an upper zone is set to generate certain lag compared with that of a lower zone, temperature uniformity is achieved, stress is released at the same time, shrinkage of all zones is consistent, a connecting layer is uniform, a finished product is free of defects, and the method has the advantages of being easy to operate and simple in process. The method disclosed by the invention is high in efficiency and simple to operate, and has a huge application prospect in connection of large-size silicon carbide ceramic parts.
本发明属于碳化硅陶瓷材料加工技术领域，具体涉及一种无压烧结碳化硅的凝胶连接方法。所述无压烧结碳化硅的凝胶连接方法，使用第一模具和第二模具通过浇注连接、无压烧结的方式制备碳化硅产品。本发明的方法根据浆料固化收缩‑时间曲线，更科学合理地进行凝胶连接，利用凝胶注模在反应期完成连接并再次诱导，消除氧阻聚层；同时采用二区控温的干燥和无压烧结工艺，根据热流始终向上的特性，设定上区控温较下区产生一定的滞后，实现温度均匀，同时释放应力，使各区收缩一致和连接层均匀，使成品无缺陷，并具有操作容易，过程简单的特点。本发明的方法效率高、操作简单，在大尺寸碳化硅陶瓷件的连接上有巨大的应用前景。
Gel connection method of pressureless sintered silicon carbide
一种无压烧结碳化硅的凝胶连接方法
SONG YUNYUN (Autor:in) / FAN TIANYANG (Autor:in) / ZHANG XIN (Autor:in) / LI SHUNSHUN (Autor:in) / CHEN ENHOU (Autor:in)
27.02.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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