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

Xiangyu Dai; Jian Cao; Jiakun Liu; Shuai Su; Jicai Feng

doi:10.1016/j.matdes.2015.08.020

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

Xiangyu Dai
, Jian Cao^*
, Jiakun Liu
, Shuai Su
, Jicai Feng

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Contribution to journal › Article › peer-review

62 Scopus citations

Abstract

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 48.4MPa was achieved when brazed at 880°C for 10min.

Original language	English
Pages (from-to)	53-59
Number of pages	7
Journal	Materials and Design
Volume	87
DOIs	https://doi.org/10.1016/j.matdes.2015.08.020
State	Published - 15 Dec 2015

Keywords

Brazing
Interfacial microstructure
Mechanical properties
TiAl alloy
ZrO ceramic

Access to Document

10.1016/j.matdes.2015.08.020

Cite this

@article{fa5510ef76aa4f939509d7f2b93e74ce,

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

abstract = "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 48.4MPa was achieved when brazed at 880°C for 10min.",

keywords = "Brazing, Interfacial microstructure, Mechanical properties, TiAl alloy, ZrO ceramic",

author = "Xiangyu Dai and Jian Cao and Jiakun Liu and Shuai Su and Jicai Feng",

note = "Publisher Copyright: {\textcopyright} 2015 Elsevier Ltd.",

year = "2015",

month = dec,

day = "15",

doi = "10.1016/j.matdes.2015.08.020",

language = "英语",

volume = "87",

pages = "53--59",

journal = "Materials and Design",

issn = "0264-1275",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Effect of holding time on microstructure and mechanical properties of ZrO2/TiAl joints brazed by Ag-Cu filler metal

AU - Dai, Xiangyu

AU - Cao, Jian

AU - Liu, Jiakun

AU - Su, Shuai

AU - Feng, Jicai

PY - 2015/12/15

Y1 - 2015/12/15

N2 - 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 48.4MPa was achieved when brazed at 880°C for 10min.

AB - 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 48.4MPa was achieved when brazed at 880°C for 10min.

KW - Brazing

KW - Interfacial microstructure

KW - Mechanical properties

KW - TiAl alloy

KW - ZrO ceramic

UR - https://www.scopus.com/pages/publications/84944236921

U2 - 10.1016/j.matdes.2015.08.020

DO - 10.1016/j.matdes.2015.08.020

M3 - 文章

AN - SCOPUS:84944236921

SN - 0264-1275

VL - 87

SP - 53

EP - 59

JO - Materials and Design

JF - Materials and Design

ER -

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

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this