Relief of the residual stresses in Si3N4/Invar joints by multi-layered braze structure - Experiments and simulation

被引：65

作者：

Wang, Tianpeng ^{[1
]}

Ivas, Toni ^{[2
]}

Lee, Wookjin ^{[3
]}

Leinenbach, Christian ^{[2
]}

Zhang, Jie ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Empa, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

[3] Korea Inst Ind Technol, 30,Gwahaksandan 1 Ro,60beon Gil, Busan 46742, South Korea

来源：

CERAMICS INTERNATIONAL | 2016年 / 42卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Si3N4; ceramic; Brazing; Finite element simulation; Residual stress; METAL-MATRIX COMPOSITES; SILICON-NITRIDE; THERMAL-EXPANSION; MECHANICAL-PROPERTIES; FILLER MATERIALS; FE-NI; STEEL; INTERLAYER; ALLOY; TI;

D O I：

10.1016/j.ceramint.2016.01.096

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An Ag-Cu-Ti+TiNp/Cu/Ag-Cu three-layered filler was designed to braze Si3N4 ceramic and Invar alloy. The effect of the Cu-foil thickness on the microstructure and the mechanical properties of the brazed joints was investigated. Compared with single-layer Ag-Cu-Ti+TiNp filler, the formation of Fe2Ti and Ni3Ti compounds is widely inhibited by using multi-layered filler. The shear strength of the brazed joint is 47.9% higher than that of joints brazed with single Ag-Cu-Ti+TiNp filler when a 200 mu m thick Cu interlayer is used. A simplified unit cell model was designed to obtain the physical properties of the TiNp reinforced filler. The model provides the elastic modulus and yield stress that satisfy the Hashin-Shtrikman bounds and N. Ramalcrishnan's equations, respectively. In the three-layered brazing, the finite element (FE) model shows that system residual stresses decrease significantly by increasing the thickness of Cu foil in the multi-layered system. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：7080 / 7087

页数：8

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