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Phase-field modeling of reactive wetting and growth of the intermetallic Al2Au phase in the Al-Au system

Wang, Fei and Reiter, Andreas and Kellner, Michael and Brillo, Jürgen and Selzer, Michael and Nestler, Britta (2018) Phase-field modeling of reactive wetting and growth of the intermetallic Al2Au phase in the Al-Au system. Acta Materialia, 146, pp. 106-118. Elsevier. doi: 10.1016/j.actamat.2017.12.015. ISSN 1359-6454.

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Abstract

When an Al-droplet is in contact with an Au-solid substrate, the liquid phase reacts with the substrate and an intermetallic layer is formed at the solid-liquid interface due to diffusion and reaction. This phenomenon has been commonly observed in the soldering process and the wetting is termed as reactive wetting, in contrast to the inert wetting where the droplet does not react with the base materials and the substrate is flat. Young's law can be used to interpret the contact angle in the static state, but is not able to predict the dynamics in the process of reactive wetting. In this work, we present a multiphase model including phase transition and fluid dynamics to investigate the effect of the formation of the intermetallic Al2Au phase and capillary flow on the reactive wetting in the Al-Au system. In order to capture phase boundaries of solid-, liquid- and intermetallic-vapor, phase-field simulations are performed based on a ternary (Al-Au-X) phase diagram concept and using experimental data. It has been found that the increase of both the liquid-intermetallic interfacial tension as well as the capillary flow lead to an inhibition effect for the growth of the intermetallic phase.

Item URL in elib:https://elib.dlr.de/118102/
Document Type:Article
Title:Phase-field modeling of reactive wetting and growth of the intermetallic Al2Au phase in the Al-Au system
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wang, FeiKIT KarlsruheUNSPECIFIED
Reiter, AndreasKIT KarsruheUNSPECIFIED
Kellner, MichaelKIT KarlsruheUNSPECIFIED
Brillo, JürgenJuergen.Brillo (at) dlr.deUNSPECIFIED
Selzer, MichaelKIT KarlsruheUNSPECIFIED
Nestler, BrittaKIT KarlsruheUNSPECIFIED
Date:January 2018
Journal or Publication Title:Acta Materialia
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:146
DOI :10.1016/j.actamat.2017.12.015
Page Range:pp. 106-118
Publisher:Elsevier
ISSN:1359-6454
Status:Published
Keywords:Reactive wetting Capillary flow Phase-field model Intermetallics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Materials Research and Microgravity (MuM)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space > Scientific Experiments MP
Deposited By: Brillo, Dr.rer.nat. Jürgen
Deposited On:16 Jan 2018 15:29
Last Modified:31 Jul 2019 20:15

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