Journal of Electronic Materials

, Volume 39, Issue 3, pp 312–317 | Cite as

Thermal Analysis of the Sn-Ag-Cu-In Solder Alloy

  • Jir̆í Sopoušek
  • Marián Palcut
  • Erika Hodúlová
  • Jozef Janovec
Article

The tin-based alloy Sn-1.5Ag-0.7Cu-9.5In (composition in wt.%) is a potential candidate for lead-free soldering at temperatures close to 200°C due to the significant amount of indium. Samples of Sn-1.5Ag-0.7Cu-9.5In were prepared by controlled melting of the pure elements, followed by quenching to room temperature. The samples were analyzed by scanning electron microscopy/energy-dispersive x-ray spectroscopy (SEM/EDS) and electron backscatter diffraction. The solidified melt consisted of four different phases. Solidification behavior was monitored by heat-flux differential scanning calorimetry (DSC). The phase equilibrium has been further investigated by thermodynamic calculations. The observed phase compositions as well as DSC signals are reasonably explained using the calculation of phase diagrams (CALPHAD) approach.

Keywords

Lead-free soldering solidification CALPHAD DSC simulation 

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Copyright information

© TMS 2010

Authors and Affiliations

  • Jir̆í Sopoušek
    • 1
  • Marián Palcut
    • 2
    • 4
  • Erika Hodúlová
    • 3
  • Jozef Janovec
    • 2
  1. 1.Institute of Chemistry, Faculty of ScienceMasaryk UniversityBrnoCzech Republic
  2. 2.Institute of Materials Science, Faculty of Materials Science and TechnologySlovak University of TechnologyTrnavaSlovakia
  3. 3.Institute of Production Technologies, Faculty of Materials Science and TechnologySlovak University of TechnologyTrnavaSlovakia
  4. 4.Division of Fuel Cells and Solid State Chemistry, Risø National Laboratory for Sustainable EnergyTechnical University of DenmarkRoskildeDenmark

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