Effect of holding time on microstructure and mechanical properties of ZrO2/TiAl joints brazed by Ag-Cu filler metal

被引：54

作者：

Dai, Xiangyu ^{[1
]}

Cao, Jian ^{[1
]}

Liu, Jiakun ^{[1
]}

Su, Shuai ^{[1
]}

Feng, Jicai ^{[1
]}

机构：

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

来源：

MATERIALS & DESIGN | 2015年 / 87卷

基金：

中国国家自然科学基金;

关键词：

TiAl alloy; ZrO2; ceramic; Brazing; Interfacial microstructure; Mechanical properties; INTERFACIAL MICROSTRUCTURE; STEEL JOINTS; STAINLESS-STEEL; TIAL ALLOYS; ZIRCONIA; EVOLUTION; INTERLAYERS; SOLUBILITY; BEHAVIOR; YSZ;

D O I：

10.1016/j.matdes.2015.08.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Reliable joining of ZrO2 ceramic to TiAl alloy is crucial for the success of the engine industrial application. However, there have been few systematic investigations on joining of ZrO2 ceramic and TiAl alloy. In this study, reliable brazing of ZrO2 ceramic and TiAl alloy was achieved using inactive AgCu filler metal. The interfacial microstructure of the joints was characterized by SEM, XRD and TEM. Effects of holding time on the microstructure and mechanical properties of the joints were investigated in details. The results revealed that Cu3Ti3O + TiO layers were formed adjacent to ZrO2 ceramic while AlCu2Ti layer was formed at TiAl substrate. The thickness of Cu3Ti3O + TiO layers increased and the granular AlCu2Ti coarsened gradually with the prolongation of holding time. The hardness and Young's modulus of reaction phases were characterized by nano-indentation to reveal the plastic deformability. The highest shear strength of 48.4 MPa was achieved when brazed at 880 degrees C for 10 min. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：53 / 59

页数：7

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