Microstructure and properties of C/C and C/SiC composites brazed by reactive infiltration of Si - Zr filler alloy

被引：2
作者：
He, Zongjing [1 ]
Xu, Huining [1 ]
Sun, Liangbo [2 ,3 ,4 ]
Li, Chun [4 ]
Si, Xiaoqing [4 ]
Cao, Jian [4 ]
机构：
[1] Harbin Inst Technol, Sch Transportat & Sci Engn, Harbin 150090, Peoples R China
[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[3] Harbin Inst Technol, Ctr Anal Measurement & Comp, Harbin 150001, Peoples R China
[4] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2024年 / 213卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
C/SiC composites; C/C composites; Brazing; Si-based alloy; Interfacial reaction; INTERFACIAL REACTION; PERFORMANCE; BEHAVIOR;
D O I：
10.1016/j.matchar.2024.114038
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The joint between C/C composites and liquid silicon infiltrated-C/SiC composites was achieved using a Si - 10Zr (at. %) eutectic filler. The microstructure and mechanical properties of joints at different brazing temperature and holding time were characterized. The results showed that the melting filler infiltrated along the carbon fiber bundle gaps and formed SiC reaction layers at both interfaces. On the side of C/SiC composites, the residual silicon in the original base material dissolved into the molten Si - 10Zr alloy during the brazing procedure. The phenomenon resulted in intense infiltration of the liquid filler into C/SiC composites, which formed a unique C/ SiC-Si-ZrSi 2 multiphase -ceramic gradient structure. Excessive filler was squeezed out around the joint seam to form a fillet. The shear strength of the joint reached up to 37 MPa, with fracture occurrence in both substrates and the joint seam. Reliable bonding between C/C and C/SiC dissimilar composites was finally achieved.
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页数：9
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