公开(公告)号：EP4230336A1

公开(公告)日：2023-08-23

申请号：EP21890809.3

申请日：2021-09-17

申请人： Ling Dong Nuclear Power Co., Ltd ,  China Nuclear Power Technology Research Institute Co., Ltd. ,  China General Nuclear Power Corporation ,  CGN Power Co., Ltd.

发明人： XUE, Jiaxiang ,  LIAO, Yehong ,  REN, Qisen ,  LIU, Tong ,  ZHAI, Jianhan ,  MA, Haibin ,  ZHANG, Xiansheng ,  ZHANG, Yongdong ,  LI, Rui ,  LIU, Yang

IPC分类号： B23K1/008 ,  B23K1/19

摘要： A brazing connection method for a silicon carbide cladding, comprising the following steps: S1, using Al and Si as connection materials, providing the connection materials between a cladding pipe and an end plug which are matched with each other, forming a middle connection material of an Al/Si/Al three-layer structure, and forming, by means of the middle connection material, the cladding pipe, and the end plug, an assembly to be connected; and S2, placing said assembly in a vacuum or inert atmosphere for brazing connection, the middle connection material forming a connection layer, and connecting the cladding pipe and the end plug into a whole. The present invention further relates to a silicon carbide cladding formed by the method, a fuel rod comprising same, and a fuel assembly. In the present brazing connection method, Al and Si are used as the connection materials, and the connection layer of the Al/Si/Al three-layer structure is formed between the cladding pipe and the end plug, such that high-strength and reliable connection of the SiC cladding is achieved, and the SiC cladding is good in high-temperature resistance and hydrothermal corrosion resistance, thereby meeting nuclear application requirements.

公开(公告)号：EP4230598A1

公开(公告)日：2023-08-23

申请号：EP21890810.1

申请日：2021-09-17

申请人： China Nuclear Power Technology Research Institute Co., Ltd. ,  Ling Dong Nuclear Power Co., Ltd ,  China General Nuclear Power Corporation ,  CGN Power Co., Ltd.

发明人： XUE, Jiaxiang ,  LIAO, Yehong ,  REN, Qisen ,  LIU, Tong ,  ZHAI, Jianhan ,  MA, Haibin ,  ZHANG, Xiansheng ,  ZHANG, Yongdong ,  LI, Rui ,  LIU, Yang

IPC分类号： C04B37/00 ,  G21C3/06

摘要： Disclosed are a solder for connection and a preparation method therefor and a method for connecting a silicon carbide cladding. The solder for connection comprises the following raw materials: a precursor, a glass powder and an organic solvent, wherein the mass ratio of the precursor to the glass powder is 90-98: 2-10. The solder for connection of the present invention is used for connecting a silicon carbide cladding. A glass additive phase formed by the glass powder has good wettability to silicon carbide and a high connection strength. The proportion of the glass powder is adjustable, so that the coefficient of thermal expansion of the glass additive phase is adjustable, and the stress of a joint after connection is controllable. A thick compact connection layer can be realized, facilitating engineering assembly and realizing better air tightness.