The ternary system Ag-Ni-Sn is one of the constituents of the quaternary system Ag-Cu-Ni-Sn, which is of interest for the investigation of the interactions of Ag-Cu-Sn solder alloys with Ni as a substrate. Until now, only limited research has been done on the Ag-Ni-Sn system, especially in the (Ag,Ni)-rich part, most probably due to experimental difficulties caused by the monotectic reaction in the Ag-Ni binary system, which extends far into the ternary. In the present work a comprehensive study of the phase equilibria in four isothermal sections of the Ag-Ni-Sn system at 200, 450, 700, and 1050°C was carried out employing X-ray diffraction (XRD), metallography, and electron probe microanalysis (EPMA). No evidence for the existence of a ternary phase was obtained, and, in most cases, ternary solubilities of the binary phases were found to be insignificant. The liquid miscibility gap at high temperatures caused a number of serious experimental problems during sample preparation.
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ACKNOWLEDGEMENTS
This research is a contribution to the European COST Action 531. Financial support from the Austrian Science Foundation (FWF) under Project No. P-16495-N11 is gratefully acknowledged. The authors also want to thank Prof. Harald Schmidt, Department for Physical Chemistry of the University of Vienna, for his assistance with metallographic investigations.
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Schmetterer, C., Flandorfer, H., Richter, K.W. et al. Phase Equilibria in the Ag-Ni-Sn System: Isothermal Sections. J. Electron. Mater. 36, 1415–1428 (2007). https://doi.org/10.1007/s11664-007-0205-6
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DOI: https://doi.org/10.1007/s11664-007-0205-6