Interfacial Structure and Properties of Al2O3 Ceramic and TiAl Alloy Brazed Joints

被引：0

作者：

Niu Guobin ^{[1
]}

Wang Dongpo ^{[1
]}

Yang Zhenwen ^{[1
]}

Wang Ying ^{[1
]}

机构：

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

来源：

RARE METAL MATERIALS AND ENGINEERING | 2017年 / 46卷 / 11期

关键词：

TiAl alloy; Al2O3; ceramic; brazing; interfacial microstructure; shear strength; MECHANICAL-PROPERTIES; MICROSTRUCTURE; ALUMINA; INTERLAYER; EVOLUTION; STRENGTH; BEHAVIOR; PHASES; FILLER;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Al2O3 ceramic and TiAl alloy were brazed with AgCuTi filler and the interfacial structure with the change of brazing parameters as well as the forming mechanism of the joint were studied. The results show that the typical interfacial microstructure of the brazed joints is Al2O3/Ti-3(Cu,Al)(3)O/Ag(s.s)+Cu(s.s)+AlCu2Ti/AlCu2Ti+AlCuTi/TiAl. During the brazing, Ti and Al can dissolve from the TiAl substrate and make a major impact on the microstructure and mechanical properties of the brazed joints. With increasing of brazing temperature and time, the thickness of Ti-3(Cu,Al)(3)O reaction layer increases and the blocky AlCu2Ti compounds aggregate and grow up gradually, which influences collectively the mechanical properties of the joint. The average shear strength reaches a maximum of 94 MPa with the joint brazed with 880 degrees C/10 min. The crack primarily propagates at Al2O3 substrate and partially along the reaction layer.

引用

页码：3282 / 3287

页数：6

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