Effect of Composition Optimization of Ni-base Filler Alloy on Microstructure of Vacuum Brazing Joint of SiC<sub>f</sub>/SiC Composite Ceramic

Shi Haojiang; Zhang Ruiqian; Yan Jiazhen; Li Ming; Liu Zihao; Bai Dong; He Yong; Lyu Junnan

doi:10.13832/j.jnpe.2023.S1.0181

Volume 44 Issue S1

Jun. 2023

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Article Navigation > Nuclear Power Engineering > 2023 > 44(S1): 181-187

Shi Haojiang, Zhang Ruiqian, Yan Jiazhen, Li Ming, Liu Zihao, Bai Dong, He Yong, Lyu Junnan. Effect of Composition Optimization of Ni-base Filler Alloy on Microstructure of Vacuum Brazing Joint of SiCf/SiC Composite Ceramic[J]. Nuclear Power Engineering, 2023, 44(S1): 181-187. doi: 10.13832/j.jnpe.2023.S1.0181

Citation:

Shi Haojiang, Zhang Ruiqian, Yan Jiazhen, Li Ming, Liu Zihao, Bai Dong, He Yong, Lyu Junnan. Effect of Composition Optimization of Ni-base Filler Alloy on Microstructure of Vacuum Brazing Joint of SiC_f/SiC Composite Ceramic[J]. Nuclear Power Engineering, 2023, 44(S1): 181-187. doi: 10.13832/j.jnpe.2023.S1.0181

Citation:

Shi Haojiang, Zhang Ruiqian, Yan Jiazhen, Li Ming, Liu Zihao, Bai Dong, He Yong, Lyu Junnan. Effect of Composition Optimization of Ni-base Filler Alloy on Microstructure of Vacuum Brazing Joint of SiC_f/SiC Composite Ceramic[J]. Nuclear Power Engineering, 2023, 44(S1): 181-187. doi: 10.13832/j.jnpe.2023.S1.0181

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Effect of Composition Optimization of Ni-base Filler Alloy on Microstructure of Vacuum Brazing Joint of SiC_f/SiC Composite Ceramic

doi: 10.13832/j.jnpe.2023.S1.0181

1.
Science and Technology on Reactor Fuel and Materials Laboratory, Nuclear Power Institute of China, Chengdu, 610213, China
2.
School of Mechanical Engineering, Sichuan University, Chengdu, 610065, China

Received Date: 2023-02-21
Rev Recd Date: 2023-04-15
Publish Date: 2023-06-15

Abstract

Abstract

In order to explore the difference of brazing process between SiC_f/SiC composites and SiC ceramics, the vacuum brazing connection between SiC_f/SiC composites and SiC ceramics was realized by using Ni-based alloy brazing filler metal to hold heat for 10 min at 1400°C in vacuum, and the composition of Ni-based filler metal was optimized according to the microstructure characteristics of weld joints. Finally, the SiC_f/SiC composite ceramic vacuum brazed joint with good weld quality and less SiC fiber damage was obtained. The results show that the reaction mechanism of SiC ceramics and SiC_f/SiC composites is the same as that of filler metal, and there is no difference in the reaction products. Due to the structural characteristics of SiC_f/SiC composites, the filler metal will be lost along the gap under the action of capillarity and react with SiC fibers to cause fiber damage during brazing. Therefore, the reaction tendency between filler metal and SiC_f/SiC composites should be reduced to avoid the quality damage of SiC fibers. The results can provide reference for the composition of filler metal and brazing process design of SiC_f/SiC composites.
- SiC_f/SiC composite ceramic,
- SiC fiber,
- Vacuum brazing,
- Brazing alloy,
- Composition optimization,
- Reaction driving force

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References(19)

References

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