Interlayer-free rapid direct connection method for pressureless solid-phase sintered silicon carbide ceramics: Fid-Bau Portal

Interlayer-free rapid direct connection method for pressureless solid-phase sintered silicon carbide ceramics

SHI ZHONGQI / XU XIANGYANG / ZHANG BIAO / WEI ZHILEI / MA YINUO / XIA HONGYAN

The invention discloses an intermediate-layer-free rapid direct connection method for pressureless solid-phase sintered silicon carbide ceramics, which belongs to the technical field of silicon carbide ceramic material processing, and comprises the following steps: 1) processing the pressureless solid-phase sintered silicon carbide ceramics into two samples, and cleaning for later use; and 2) directly assembling the two silicon carbide ceramic samples treated in the step 1), then putting the assembled silicon carbide ceramic samples into a graphite mold, and carrying out spark plasma sintering treatment in a vacuum environment to prepare the pressureless solid-phase sintered silicon carbide ceramic connecting piece with high connection strength. According to the intermediate-layer-free rapid direct connection method for the pressureless solid-phase sintered silicon carbide ceramics, a pressureless solid-phase sintered silicon carbide ceramic connecting piece can be applied to extreme working conditions such as high temperature, high bearing capacity and strong corrosion, for example, connection of a silicon carbide microchannel reactor in the chemical industry field can be realized; the silicon carbide cladding tube sealing in the nuclear energy field and the like have a wide application prospect.

本发明公开了一种无压固相烧结碳化硅陶瓷的无中间层快速直接连接方法，属于碳化硅陶瓷材料加工技术领域，包括以下步骤：1）将无压固相烧结碳化硅陶瓷加工成两块试样，清洁后备用；2）将步骤1）处理的两块碳化硅陶瓷试样直接装配，随后放入石墨模具中，在真空环境下，进行放电等离子烧结处理，制备出具有高连接强度的无压固相烧结碳化硅陶瓷连接件。本发明的无压固相烧结碳化硅陶瓷的无中间层快速直接连接方法可使无压固相烧结碳化硅陶瓷连接件应用于高温、高承载、强腐蚀等极端工况下，如可实现化工领域用碳化硅微通道反应器的连接，核能领域用碳化硅包壳管封接等的应用需求，具有广阔的应用前景。

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