The development of modern soldering technologies directed to the substitution of tin-lead alloys (lead free soldering) has not been elaborated in every detail. Therefore, wetting by various alloys, which can be potentially used in soldering and brazing technologies, is in the front of interest. The significance of Ag-based (filling) alloys with sufficient wettability is outstanding in this respect.
The wettability of graphite by different silver-based liquid alloys was measured using the sessile drop method at a temperature interval of 1273 – 1473 K as function of composition. It was shown that no dissolution or chemical reaction occur in the system up to 1473 K. We found that the equilibrium contact angle was established within a minute.
The Butler equation was modified for the description of the concentration dependence of the contact angle.