Influences of trace additions of strontium and phosphorus on electrical resistivity and viscosity of liquid Al-Si alloys

摘要

The electrical resistivity and viscosity of liquid hypoeutectic Al-7/100 Si and hypereutectic Al- 18/100 Si alloys, and the influences of trace strontium and phosphorus on them were investigated. The trace ad- ditions of the two elements increase the electrical resistivity. At the precipitation temperatures of primary phase, the electrical resistivity exhibits a discontinuity for all experimental Al-Si alloys. In the discontinuity the electrical resistivity, respectively, decreases and increases abrup0tly for Al-7/100 Si alloys and Al-18/100 Si al- loys.