Abstract

The melt spinning technique has been used in this study to produce rapidly solidified alloys in the simple binary Al-Sn alloys.Aluminum-5,15 and 25%Sn were prepared by as cast and melt spun technique. Optical microcopy,X-rays diffraction analysis and scanning electron with energy dispersive spectroscopy (EDS) were used to provide information about the difference in microstructure and phases of as cast and rapid solidified samples. In addition to hardness values of the ribbons and as cast ingots also measured. The results revealed that microstructure of the as cast alloys is formed from Sn particle spread in a continuous Al-rich matrix, moreover thin predendritic fine chill crystal zone at the wheel side with only Sn-rich phase particles, which develops into a region of disordered dendritic columnar grains. There is no solubility of Al in Sn or vice versa in thermal equilibrium diagram of aluminum-tin alloy system at room temperature; also, there is no intermediate phase formed between Al and Sn by conventional production processes. X-ray diffraction has ascertained the presence of the equilibrium phases for rapid solidified alloys. The hardness values of melt-spun alloys increase approximately twice higher than those of original ingot alloy.