Numéro |
J. Phys. IV France
Volume 12, Numéro 8, September 2002
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Page(s) | 229 - 237 | |
DOI | https://doi.org/10.1051/jp4:20020336 |
J. Phys. IV France 12 (2002) Pr8-229
DOI: 10.1051/jp4:20020336
Liquid metal penetration in metallic polycrystals: New tools for a challenging unsolved problem of materials science
J. Bernardini1, J.-P. Monchoux2, D. Chatain3 and E. Rabkin21 Laboratoire de Matériaux et Microélectronique de Provence, Faculté de Saint-Jerôme, 13397 Marseille, France
2 Department of Materials Engineering, Technion-Israel Institute of Technology, 32000 Haifa, Israël
3 Centre de Recherche sur les Mécanismes de la Croissance Cristalline, CNRS, Campus de Luminy, Case 913, 13288 Marseille cedex 9, France
Abstract
The set of works performed in the framework of the GEDEON program on liquid
metal
embrittlement is presented. We focus on the role of wetting of grain boundaries (CBs) in the
rapid
penetration of a liquid metal along GB, and we point out the thermodynamic and kinetic
parameters
involved in this phenomenon. Since the paper of Mullins (1957) and the experimental studies
performed in the 60's, new tools are available for the observation of grain boundary grooving
(and
wetting) at a scale below one micron. They are scanning electron microscopy (SEM) and atomic
force microscopy (AFM). It will be shown on copper-, iron- and nickel-based alloys that accurate
observations with these facilities allow to reveal the role of interface faceting in grain boundary
penetration and to propose a new model which takes into account this new feature.
© EDP Sciences 2002