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The Experimental and Theoretical Study of the Pd-Sn-Zn System

Jiri Vizdal 1,2Ales Kroupa 1

1. Czech Academy of Sciences, Institute of Physics of Materials (IPM), Zizkova 22, Brno 61662, Czech Republic
2. Brno University of Technology, Faculty of Mechanical Engineering, Institute of Materials Science and Engineering, Technicka 2896/2, Brno 61669, Czech Republic


The experimental and theoretical study of the Pd-Sn-Zn system was carried out in the scope of this contribution. The knowledge of the phase diagram of this system is important from the point of view of the lead-free soldering as the Sn-Zn system is one of the candidate materials and Pd can be found in a substrate of the soldered joint. The binary systems Pd-Sn and Sn-Zn are currently assessed [1,2] whereas a few information about Pd-Zn exists but the first assessment of the Pd-Zn system was carried out recently [3].

Binary systems information was utilized for a calculation of the above mentioned ternary system prediction and the experimental alloys in significant regions were prepared. Authors have chosen Sn-Zn rich part of the phase diagram where calculations indicate the possibility of the miscibility gap presence in liquid phase. The samples were long term annealed at selected temperatures to obtain states close to the thermodynamic equilibrium and afterwards studied by SEM with EDX and WDX analysis. Experimental results and first Pd-Sn-Zn system modelling will be presented in this contribution.

This work is supported by the Ministry of Education of the Czech Republic under the project COST 531.002 and Grant Agency of the Academy of Sciences of the Czech Republic No. S2041105.

[1] Version 1.1 COST 531 Database for Lead-free Solders.

[2] Fries, S. G., Lukas, H. L. in Thermochemical database for light metal alloys,

eds.: Ansara, I., Dinsdale, A. T., Rand, M. H.; COST 507, July 1998.

[3] Popovic, J., Kroupa, A., Vizdal, J.: The Experimental and Theoretical Study of the Pd-Zn System.

Presented at international conference TOFA 2004, Book of Abstracts, Vienna, Austria, September 2004.


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Presentation: oral at E-MRS Fall Meeting 2005, Symposium H, by Jiri Vizdal
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-04-27 14:50
Revised:   2009-06-07 00:44