Development of Lead-Free Nanocomposite Solders Using Oxide Based Reinforcement

In this study, Sn.3.5Ag/SnO₂ nanocomposite solders are developed. Composites with 0.7 and 1.0 volume percentage of tin oxide were synthesized through powder metallurgy route incorporating microwave assisted rapid sintering technique followed by hot extrusion. The extruded specimens were examined in terms of their physical and tensile properties. Tensile characterization studies revealed that 0.2% yield strength and ultimate tensile strength were increased significantly by addition of 0.7 volume percent of nano SnO₂ particles. An attempt is made to correlate mechanical properties of Sn-3.5Ag with the presence of SnO₂ particles at the nanometer length scale.