Growth of intermetallic compounds in the Au-In system: Experimental study and 1-D modelling

被引：12

作者：

Deillon, L. ^{[1
,2
,3
]}

Hessler, T. ^{[1
]}

Hessler-Wyser, A. ^{[3
]}

Rappaz, M. ^{[2
]}

机构：

[1] Swatch Grp R&D SA, Div Asulab, CH-2074 Marin, Switzerland

[2] Ecole Polytech Fed Lausanne, Lab Simulat Mat, CH-1015 Lausanne, Switzerland

[3] Ecole Polytech Fed Lausanne, Ctr Interdisciplinaire Microscopie Elect, CH-1015 Lausanne, Switzerland

来源：

ACTA MATERIALIA | 2014年 / 79卷

关键词：

Gold; Indium; Diffusion; Intermetallic compounds growth; DIFFUSION; INDIUM;

D O I：

10.1016/j.actamat.2014.07.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The gold indium system is of primary interest for bonding processes such as solid liquid interdiffusion bonding. In order to optimize the manufacturing parameters, it is essential to know which intermetallic compounds (IMCs) are formed when solid Au and liquid In are brought into close contact with each other, and what are their growth kinetics. For this purpose, we fabricated diffusion couples above and below the melting point of In (for T = 250 and 150 degrees C respectively). Three IMCs, identified as AuIn2, AuIn and Au7In3, are always observed in the reaction zone, even after short times. AuIn2 is the thickest and fastest growing layer and AuIn is only present as a thin layer. Whereas AuIn2 and AuIn exhibit an equiaxed structure, Au7In3 is found to grow as columnar grains. The diffusion coefficients in each phase were determined by means of a 1-D finite difference modelling of In diffusion. The values are consistent and can be used to predict the growth rate as a function of temperature and time, i.e. to simulate a whole bonding process with finite thicknesses. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：258 / 267

页数：10

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