Microstructural analysis of germanium modified tin-copper brazing filler metals for transient liquid phase bonding of aluminium

被引：0

作者：

Iskandar, R. ^{[1
]}

Schwedt, A. ^{[1
]}

Mayer, J. ^{[1
]}

Rochala, P. ^{[2
]}

Wiesner, S. ^{[2
]}

Oete, M. ^{[2
]}

Bobzin, K. ^{[2
]}

Weirich, T. E. ^{[1
,3
]}

机构：

[1] Rhein Westfal TH Aachen, Cent Facil Electron Microscopy, Ahornstr 55, D-52074 Aachen, Germany

[2] Rhein Westfal TH Aachen, Surface Engn Inst, Kackerstr 15, D-52072 Aachen, Germany

[3] Rhein Westfal TH Aachen, Inst Crystallog, Jagerstr 17-19, D-52066 Aachen, Germany

来源：

MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK | 2017年 / 48卷 / 12期

关键词：

Transient liquid phase; copper; tin; germanium; aluminium; electron microscopy; electron backscatter diffraction; energy dispersive X-ray spectroscopy; electron diffraction; hexagonal crystal structure; SUPERALLOY; SYSTEM;

D O I：

10.1002/mawe.201700155

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present contribution summarises first results that have been achieved with the new brazing material Sn75Cu20Ge5 (wt-%) for transient liquid phase (TLP) bonding of aluminium cast alloy AlSi7Mg0.3 (wt-%). The microstructure of the braze ribbons and the obtained joints have been thoroughly investigated on different length-scales using scanning and transmission electron microscopy as well. Whereas the braze ribbon material is only composed of beta-tin, eta-phase (Cu6Sn5) and some germanium rich precipitates, the transient liquid phase joint displays a much more complex microstructure that consist mainly of beta-tin and different aluminium-copper and aluminium-germanium phases. In addition small silicon oxide rods and a hitherto unreported hexagonal aluminium-copper-magnesium-germanium phase with approximated lattice parameters a = 0.7123 nm, c = 2.40 nm have been found in the seam of the joint.

引用

页码：1257 / 1263

页数：7

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