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A ZrO2 nanoparticle strengthened lead-free Sn-3,5Ag-ZrO2 solder was prepared by mechanically stirring ZrO2 nanoparticles into the molten melt of eutectic Sn-3.5Ag alloy. The influence of ZrO2 nanoparticles on the eutectic solidification process, in particular, the formation of Ag3Sn intermetallic compounds (IMCs) and the associated microstructure that forms and microhardness of Sn-3.5Ag solder, was...
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