The microstructure and mechanical performance of C/C-SiCf/SiC composite joints brazed by Si-10Zr eutectic alloy

被引：2
|
作者：
He, Zongjing [1 ]
Xu, Huining [1 ]
Li, Chun [2 ]
Si, Xiaoqing [2 ]
Qi, Junlei [2 ]
Cao, Jian [2 ]
机构：
[1] Harbin Inst Technol, Sch Transportat Sci & Engn, Harbin, Peoples R China
[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin, Peoples R China
来源：
WELDING IN THE WORLD | 2023年 / 67卷 / 02期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Brazing; Joint; Si-Zr alloy; Microstructure; Mechanical performance; ZIRCONIUM-SILICIDE; NB; BEHAVIOR; SURFACE; SI3N4;
D O I：
10.1007/s40194-022-01446-7
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The real-time wetting behavior of the Si-10Zr (at. %) eutectic alloy over the SiCf/SiC composites was investigated for the first time. The brazing of C/C composites and SiCf/SiC composites using the Si-10Zr filler alloy under a range of time was studied. The interfacial microstructure between the liquid alloy and the SiCf/SiC composites was determined. The joint microstructure, mechanical performance, and fractures of the C/C and C/C-SiCf/SiC joints were analyzed. The Si-Zr melt showed a contact angle of only 10 & DEG; at 1480 celcius, owing to good wettability and abundant infiltration into the porous SiCf/SiC composites. With the extension of holding time, the Si-10Zr alloy reacted with the two substrates and formed SiC interfacial layers. An optimal fracture mode combined the Si-ZrSi2 filler, composites, and the SiC reaction layers.
引用
收藏
页码：525 / 531
页数：7
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