Abstract
The liquidus and solidus temperatures and enthalpy of fusion for Ag-Sn alloys are systematically measured within the whole composition range by differential scanning calorimetry (DSC). The measured enthalpy of fusion is related to Sn content by polynomial functions, which exhibit one maximum value at 52 wt%Sn and two minimum values around 21 wt%Sn and 96.5 wt%Sn, respectively. The liquidus slope, the solidification temperature interval, the solute partition coefficient and the entropy of fusion are calculated on the basis of the measured results. The undercoolability of those liquid Ag-Sn alloys solidifying with primary (Ag) solid solution phase is stronger than the other alloys with the preferential nucleation of ζ and ɛ intermetallic compounds. Morphological observations reveal that peritectic reactions can rarely be completed, and the peritectic microstructures are always composed of both primary and peritectic phases.
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References
Yagodin D, Sidorov V, Janickovic D, et al. Density studies of liquid alloys Sn-Ag and Sn-Zn with near eutectic compositions. J Non-cryst Solids, 2012, 358: 2935–2937
Chen F X, Pang J H L. Characterization of IMC layer and its effect on thermomechanical fatigue life of Sn-3.8Ag-0.7Cu solder joints. J Alloy Compd, 2012, 541: 6–13
Shohji I, Yoshida T, Takahashi T. Tensile properties of Sn-Ag based lead-free solders and strain rate sensitivity. Mater Sci Eng A, 2004, 366: 50–55
Phung V S, Fujitsuka A, Ohshima, K I. Influence of 0.03 wt.% carbon black addition on the performance of Sn-3.5Ag lead-free solder. J Electron Mater, 2012, 41: 1893–1897
Garnier T, Finel A, Bouar Y L, et al. Simulation of alloy thermodynamics: From an atomic to a mesoscale Hamiltonian. Phys Rev B, 2012, 86: 054103
Terasaki H, Yamagishi H, Moriguchi K, et al. Correlation between the thermodynamic stability of austenite and the shear modulus of polycrystalline steel alloy. J Appl Phys, 2012, 111: 093523
Hülsen B, Scheffler M, Kratzer P. Thermodynamics of the Heusler alloy Co2−x Mn1+x Si: A combined density functional theory and cluster expansion study. Phys Rev B, 2009, 79: 094407
Ray P K, Chattopadhyay K, Murty B S. Influence of thermodynamics and local geometry on glass formation in Zr based alloys. Appl Phys Lett, 2008, 93: 061903
Wang Z M, Wang J Y, Jeurgens L P H, et al. Thermodynamics and mechanism of metal-induced crystallization in immiscible alloy systems: Experiments and calculations on Al/a-Ge and Al/a-Si bilayers. Phys Rev B, 2008, 77: 045424
Kissavos A E, Shallcross S, Kaufman L, et al. Thermodynamics of ordered and disordered phases in the binary Mo-Ru system. Phys Rev B, 2007, 75: 184203
Buschbeck J, Fähler S, Weisheit M, et al. Thermodynamics and kinetics during pulsed laser annealing and patterning of FePt films. J Appl Phys, 2006, 100: 123901
Harvey J P, Gheribi A E, Chartrand P. On the determination of the glass forming ability of AlxZr1−x alloys using molecular dynamics, Monte Carlo simulations, and classical thermodynamics. J Appl Phys, 2012, 112: 073508
Rouxel T. Thermodynamics of viscous flow and elasticity of glass forming liquids in the glass transition range. J Chem Phys, 2011, 135: 184501
Curiotto S, Battezzati L, Johnson E, et al. Thermodynamics and mechanism of demixing in undercooled Cu-Co-Ni alloys. Acta Mater, 2007, 55: 6642–6650
Moukhina E. Enthalpy calibration for wide DSC peaks. Thermochim Acta, 2011, 522: 96–99
Jia R, Bian X F, Wang Y Y. Thermodynamic determination of fragility in La-based glass-forming liquid. Chin Sci Bull, 2011, 56: 3912–3918
Karakaya I, Thompson W T. Ag-Sn phase diagram. Bull Alloy Phase Diagrams, 1987, 8: 340–347
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Zhai, W., Wei, B. Thermodynamic properties and microstructural characteristics of binary Ag-Sn alloys. Chin. Sci. Bull. 58, 938–944 (2013). https://doi.org/10.1007/s11434-013-5695-4
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DOI: https://doi.org/10.1007/s11434-013-5695-4