Hypereutectic Al‐Si Binary Alloys Prepared by Melt Spinning Method

Five quenched Al‐Si alloys with different compositions have been manufactured and whose properties and structures are determined. The results show that the alloys consist of supersaturated α‐Al nanocrystals, amorphous matrix and primary Si. When 30 %<CSi %<40 %, there is more than 50 % amorphous phase. Crystallization of the amorphous phases and Si separation from the supersaturated α‐Al nanocrystals occur as temperature increases.