Interfacial microstructure and joining properties of TiAl/Si3N4 brazed joints

X. G. Song; J. Cao; C. Li; J. C. Feng

doi:10.1016/j.msea.2011.05.079

Interfacial microstructure and joining properties of TiAl/Si₃N₄ brazed joints

X. G. Song
, J. Cao^*
, C. Li
, J. C. Feng

^*Corresponding author for this work

Heilongjiang Institute of Technology
Harbin Institute of Technology

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

36 Scopus citations

Abstract

Brazing titanium aluminide to silicon nitride was realized by using inactive AgCu filler metal. The effect of the brazing temperature on the interfacial microstructure and joining strength was investigated. The typical interfacial microstructure of the joint was TiAl/B₂ phase/AlCuTi/AlCu₂Ti/Ag(s,s)+AlCu₂Ti/TiN+Ti₅Si₃/Si₃N₄. With an increase of the brazing temperature, the distribution of granular AlCu₂Ti intermetallics at the center obviously changed and the thickness of TiN+Ti₅Si₃ layer adjacent to silicon nitride substrate increased simultaneously. The highest shear strength of 124.6MPa was achieved with 1133K brazing temperature and 5min holding time. In addition, the nucleation of tiny Al₃V intermetallics for the precipitation of AlCu₂Ti phase was found, which was confirmed beneficial for improving the joining properties.

Original language	English
Pages (from-to)	7030-7035
Number of pages	6
Journal	Materials Science and Engineering: A
Volume	528
Issue number	22-23
DOIs	https://doi.org/10.1016/j.msea.2011.05.079
State	Published - 25 Aug 2011

Keywords

Brazing
Interfacial microstructure
Mechanical properties
Silicon nitride
Titanium aluminide

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10.1016/j.msea.2011.05.079

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title = "Interfacial microstructure and joining properties of TiAl/Si3N4 brazed joints",

abstract = "Brazing titanium aluminide to silicon nitride was realized by using inactive AgCu filler metal. The effect of the brazing temperature on the interfacial microstructure and joining strength was investigated. The typical interfacial microstructure of the joint was TiAl/B2 phase/AlCuTi/AlCu2Ti/Ag(s,s)+AlCu2Ti/TiN+Ti5Si3/Si3N4. With an increase of the brazing temperature, the distribution of granular AlCu2Ti intermetallics at the center obviously changed and the thickness of TiN+Ti5Si3 layer adjacent to silicon nitride substrate increased simultaneously. The highest shear strength of 124.6MPa was achieved with 1133K brazing temperature and 5min holding time. In addition, the nucleation of tiny Al3V intermetallics for the precipitation of AlCu2Ti phase was found, which was confirmed beneficial for improving the joining properties.",

keywords = "Brazing, Interfacial microstructure, Mechanical properties, Silicon nitride, Titanium aluminide",

author = "Song, \{X. G.\} and J. Cao and C. Li and Feng, \{J. C.\}",

year = "2011",

month = aug,

day = "25",

doi = "10.1016/j.msea.2011.05.079",

language = "英语",

volume = "528",

pages = "7030--7035",

journal = "Materials Science and Engineering: A",

issn = "0921-5093",

publisher = "Elsevier Ltd",

number = "22-23",

}

TY - JOUR

T1 - Interfacial microstructure and joining properties of TiAl/Si3N4 brazed joints

AU - Song, X. G.

AU - Cao, J.

AU - Li, C.

AU - Feng, J. C.

PY - 2011/8/25

Y1 - 2011/8/25

N2 - Brazing titanium aluminide to silicon nitride was realized by using inactive AgCu filler metal. The effect of the brazing temperature on the interfacial microstructure and joining strength was investigated. The typical interfacial microstructure of the joint was TiAl/B2 phase/AlCuTi/AlCu2Ti/Ag(s,s)+AlCu2Ti/TiN+Ti5Si3/Si3N4. With an increase of the brazing temperature, the distribution of granular AlCu2Ti intermetallics at the center obviously changed and the thickness of TiN+Ti5Si3 layer adjacent to silicon nitride substrate increased simultaneously. The highest shear strength of 124.6MPa was achieved with 1133K brazing temperature and 5min holding time. In addition, the nucleation of tiny Al3V intermetallics for the precipitation of AlCu2Ti phase was found, which was confirmed beneficial for improving the joining properties.

AB - Brazing titanium aluminide to silicon nitride was realized by using inactive AgCu filler metal. The effect of the brazing temperature on the interfacial microstructure and joining strength was investigated. The typical interfacial microstructure of the joint was TiAl/B2 phase/AlCuTi/AlCu2Ti/Ag(s,s)+AlCu2Ti/TiN+Ti5Si3/Si3N4. With an increase of the brazing temperature, the distribution of granular AlCu2Ti intermetallics at the center obviously changed and the thickness of TiN+Ti5Si3 layer adjacent to silicon nitride substrate increased simultaneously. The highest shear strength of 124.6MPa was achieved with 1133K brazing temperature and 5min holding time. In addition, the nucleation of tiny Al3V intermetallics for the precipitation of AlCu2Ti phase was found, which was confirmed beneficial for improving the joining properties.

KW - Brazing

KW - Interfacial microstructure

KW - Mechanical properties

KW - Silicon nitride

KW - Titanium aluminide

UR - https://www.scopus.com/pages/publications/79960075188

U2 - 10.1016/j.msea.2011.05.079

DO - 10.1016/j.msea.2011.05.079

M3 - 文章

AN - SCOPUS:79960075188

SN - 0921-5093

VL - 528

SP - 7030

EP - 7035

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

IS - 22-23

ER -

Interfacial microstructure and joining properties of TiAl/Si₃N₄ brazed joints

Abstract

Keywords

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