Interfacial microstructure and mechanical properties of porous-Si3N4 ceramic and TiAl alloy joints vacuum brazed with AgCu filler

Yixuan Zhao; Xiaoguo Song; Shengpeng Hu; Jingyi Zhang; Jian Cao; Wei Fu; Jicai Feng

doi:10.1016/j.ceramint.2017.04.149

Interfacial microstructure and mechanical properties of porous-Si₃N₄ ceramic and TiAl alloy joints vacuum brazed with AgCu filler

Yixuan Zhao
, Xiaoguo Song^*
, Shengpeng Hu
, Jingyi Zhang
, Jian Cao
, Wei Fu
, Jicai Feng

^*Corresponding author for this work

Harbin Institute of Technology
Harbin Institute of Technology
China Aerospace Science and Technology Corporation

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

38 Scopus citations

Abstract

Porous Si₃N₄ ceramic was firstly joined to TiAl alloy using an AgCu filler alloy. The effects of brazing temperature and holding time on the interfacial microstructure and mechanical properties of porous-Si₃N₄/AgCu/TiAl joints were studied. The typical interfacial microstructure of joints brazed at 880 °C for 15 min was TiAl/AlCu₂Ti/Ag-Cu eutectic/penetration layer (Ti₅Si₃+TiN, Si₃N₄, Ag (s, s), Cu (s, s))/porous-Si₃N₄. The penetration layer was formed firstly in the brazing process. With increasing brazing temperature and time, the thickness of the penetration layer increased. A large amount of element Ti was consumed in the penetration layer which suppressed the formation and growth of other intermetallic compounds. The penetration layer led the fracture to propagate in the porous Si₃N₄ ceramic substrate. The maximum shear strength was ~13.56 MPa.

Original language	English
Pages (from-to)	9738-9745
Number of pages	8
Journal	Ceramics International
Volume	43
Issue number	13
DOIs	https://doi.org/10.1016/j.ceramint.2017.04.149
State	Published - 2017

Keywords

Brazing
Interfacial microstructure
Mechanical property
Porous SiN ceramic
TiAl alloy

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@article{fe61586dfb16416d956443b825e90f56,

title = "Interfacial microstructure and mechanical properties of porous-Si3N4 ceramic and TiAl alloy joints vacuum brazed with AgCu filler",

abstract = "Porous Si3N4 ceramic was firstly joined to TiAl alloy using an AgCu filler alloy. The effects of brazing temperature and holding time on the interfacial microstructure and mechanical properties of porous-Si3N4/AgCu/TiAl joints were studied. The typical interfacial microstructure of joints brazed at 880 °C for 15 min was TiAl/AlCu2Ti/Ag-Cu eutectic/penetration layer (Ti5Si3+TiN, Si3N4, Ag (s, s), Cu (s, s))/porous-Si3N4. The penetration layer was formed firstly in the brazing process. With increasing brazing temperature and time, the thickness of the penetration layer increased. A large amount of element Ti was consumed in the penetration layer which suppressed the formation and growth of other intermetallic compounds. The penetration layer led the fracture to propagate in the porous Si3N4 ceramic substrate. The maximum shear strength was \textasciitilde{}13.56 MPa.",

keywords = "Brazing, Interfacial microstructure, Mechanical property, Porous SiN ceramic, TiAl alloy",

author = "Yixuan Zhao and Xiaoguo Song and Shengpeng Hu and Jingyi Zhang and Jian Cao and Wei Fu and Jicai Feng",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd and Techna Group S.r.l.",

year = "2017",

doi = "10.1016/j.ceramint.2017.04.149",

language = "英语",

volume = "43",

pages = "9738--9745",

journal = "Ceramics International",

issn = "0272-8842",

publisher = "Elsevier Ltd",

number = "13",

}

TY - JOUR

T1 - Interfacial microstructure and mechanical properties of porous-Si3N4 ceramic and TiAl alloy joints vacuum brazed with AgCu filler

AU - Zhao, Yixuan

AU - Song, Xiaoguo

AU - Hu, Shengpeng

AU - Zhang, Jingyi

AU - Cao, Jian

AU - Fu, Wei

AU - Feng, Jicai

PY - 2017

Y1 - 2017

N2 - Porous Si3N4 ceramic was firstly joined to TiAl alloy using an AgCu filler alloy. The effects of brazing temperature and holding time on the interfacial microstructure and mechanical properties of porous-Si3N4/AgCu/TiAl joints were studied. The typical interfacial microstructure of joints brazed at 880 °C for 15 min was TiAl/AlCu2Ti/Ag-Cu eutectic/penetration layer (Ti5Si3+TiN, Si3N4, Ag (s, s), Cu (s, s))/porous-Si3N4. The penetration layer was formed firstly in the brazing process. With increasing brazing temperature and time, the thickness of the penetration layer increased. A large amount of element Ti was consumed in the penetration layer which suppressed the formation and growth of other intermetallic compounds. The penetration layer led the fracture to propagate in the porous Si3N4 ceramic substrate. The maximum shear strength was ~13.56 MPa.

AB - Porous Si3N4 ceramic was firstly joined to TiAl alloy using an AgCu filler alloy. The effects of brazing temperature and holding time on the interfacial microstructure and mechanical properties of porous-Si3N4/AgCu/TiAl joints were studied. The typical interfacial microstructure of joints brazed at 880 °C for 15 min was TiAl/AlCu2Ti/Ag-Cu eutectic/penetration layer (Ti5Si3+TiN, Si3N4, Ag (s, s), Cu (s, s))/porous-Si3N4. The penetration layer was formed firstly in the brazing process. With increasing brazing temperature and time, the thickness of the penetration layer increased. A large amount of element Ti was consumed in the penetration layer which suppressed the formation and growth of other intermetallic compounds. The penetration layer led the fracture to propagate in the porous Si3N4 ceramic substrate. The maximum shear strength was ~13.56 MPa.

KW - Brazing

KW - Interfacial microstructure

KW - Mechanical property

KW - Porous SiN ceramic

KW - TiAl alloy

UR - https://www.scopus.com/pages/publications/85018455059

U2 - 10.1016/j.ceramint.2017.04.149

DO - 10.1016/j.ceramint.2017.04.149

M3 - 文章

AN - SCOPUS:85018455059

SN - 0272-8842

VL - 43

SP - 9738

EP - 9745

JO - Ceramics International

JF - Ceramics International

IS - 13

ER -

Interfacial microstructure and mechanical properties of porous-Si₃N₄ ceramic and TiAl alloy joints vacuum brazed with AgCu filler

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Keywords

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