Phase equilibria and solidification of ternary Sn-Bi-Ag alloys

Sinn wen Chen*, Hsin-Jay Wu, Yu chih Huang, Wojciech Gierlotka

*Corresponding author for this work

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

The Sn-Bi-Ag system is an important ternary system for electronic products, and this study investigates its phase equilibria and solidification behavior. Sn-Bi-Ag alloys were prepared and equilibrated at 210 °C and 400 °C, and their equilibrium phases were determined. Thermodynamic descriptions of the ternary Sn-Bi-Ag system are developed from the results determined in this study and those available in the literature. Isothermal sections and liquidus projection are then calculated using the determined Sn-Bi-Ag thermodynamic descriptions. Solidified microstructures of three Sn-Bi-Ag alloys are examined. It is found that the solidification paths cut through the monovariant line, instead of following the monovariant line as expected.

Original languageEnglish
Pages (from-to)110-117
Number of pages8
JournalJournal of Alloys and Compounds
Volume497
Issue number1-2
DOIs
StatePublished - 14 May 2010

Keywords

  • Calphad
  • Phase equilibria
  • Solder
  • Solidification

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