Contribution to the thermodynamics of the Co-Sn system

G. P. Vassilev, K. I. Lilova

Research output: Contribution to journalArticlepeer-review

20 Scopus citations


Comments on the available topological and thermochemical data of the Co-Sn system have been done. Updated data have been used in order to obtain adjustable coefficients for phase diagram calculation. In the present work both CoSn 3 modifications are modelled as different phases. The binary melt and the Co-based phases with face centred cubic and hexagonal structures are modelled as substitutional solutions. The allotropie forms of tin (αSn, βSn) as well as the intermediate phases CoSn, CoSn2, αCoSn3 and βCoSn3 are modelled as stoichiometric compounds. The phases αCO2Sn3 and βCo2Sn3 are described by four sublattice model: (Co)1(Sn)1(Co,Va)0.5(Co,Va)0.5 in order to account for the order-disorder transition. Reasonable agreement has been obtained between the calculated and the selected experimental thermodynamic and phase equilibrium data.

Original languageEnglish (US)
Pages (from-to)365-376
Number of pages12
JournalArchives of Metallurgy and Materials
Issue number3
StatePublished - 2006
Externally publishedYes


  • Co-Sn phase diagram
  • Lead-free solders
  • Thermodynamic optimization

ASJC Scopus subject areas

  • Metals and Alloys


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