Phase equilibria in the system Ag–Ni–Sn: Thermal behavior

✍ Scribed by Clemens Schmetterer; Hans Flandorfer; Herbert Ipser

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 791 KB
• Volume: 56
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/j.actamat.2007.09.005

✦ Synopsis

The phase equilibria in the ternary Ag-Ni-Sn system, which has high relevance in lead-free soldering, were investigated by means of thermoanalytical methods. Together with the results of an earlier investigation by X-ray powder diffraction and electron probe microanalysis (Schmetterer et al., J Electron Mater, 2007), a complete and consistent ternary phase diagram was derived. Nine isopleths, a full liquidus projection and the corresponding reaction scheme (Scheil diagram) are presented here. Altogether eight invariant reactions involving the liquid phase were identified, i.e. two ternary eutectics (Type I reactions) and six transition reactions (Type II reactions), and the extension of the liquid miscibility gap was determined.