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Abstract
The electrical resistivity of Sn-3.8Ag-0.7Cu-xCe (x takes 0, 0.2, 0.5 and 1.0 weight per cent) alloy as a function of temperature was measured by DC four-probe technique. Abnormal changes occurred on the resistivity–temperature (ρ–T) curves above the liquidus, which suggested that the temperature-induced liquid–liquid structure transition probably occurred in Sn-3.8Ag-0.7Cu-xCe melt, with some reversible characters. With the increasing of Ce, the melting range was expanded from 13.0°C to 24.2°C, and the resistivity increased sharply when the Ce composition increased to 0.2%, and then declined slightly. In addition, the temperature and behaviour of abnormal zone were affected by the different additions of Ce.