Microstructure and Mechanical Properties of Invar Alloy and Si3N4 Ceramic Brazed Joints

被引：0

作者：

Wang Ying ^{[1
]}

Yang Zhenwen ^{[1
,2
]}

Zhang Lixia ^{[2
]}

Feng Jicai ^{[2
]}

机构：

[1] Tianjin Univ, Tianjin Key Lab Adv Joining Technol, Tianjin 300072, Peoples R China

[2] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2015年 / 44卷 / 02期

关键词：

Invar alloy; Si3N4; ceramic; brazing; interfacial microstructure; shear strength; INTERFACIAL STRUCTURE; BRAZING JOINTS;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Invar alloy and Si3N4 ceramic were brazed with AgCuTi active filler metal and the interfacial structure as well as the forming mechanism of the joint was studied. The effect of brazing parameters on the microstructure and mechanical properties of Invar/Si3N4 joints was investigated. The results show that TiN and Ti5Si3 layers were formed adjacent to Si3N4 ceramic due to the reaction between active Ti element and ceramic substrate. Meanwhile, Invar alloy dissolved into the liquid filler and reacted with Ti to form Fe2Ti and Ni3Ti compounds. The thickness of the reaction layer at Si3N4 ceramic and the formation of Fe2Ti-Ni3Ti brittle compounds were influenced by brazing temperature and holding time. When Invar alloy and Si3N4 ceramic were brazed at 870 degrees C for 15 min, the maximum shear strength of the joint reached 92.8 MPa. The crack primarily propagated at Si3N4 substrate and partially along the reaction layer.

引用

页码：339 / 343

页数：5

共 15 条

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