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Sn-Ag-Cu (SAC) solder is one of the most promising candidates to replace Sn-Pb (SnPb) solder alloys. Reducing the amount of Ag phase is an important approach to obtain new SAC solders with lower cost. In this article, different proportions of Bi element were added into Sn-1.0Ag-0.5Cu (SAC105) lead-free solders. The melting points of these alloys are examined and the corresponding tensile properties...
Thermal ageing of micro-porous sintered silver was examined under high temperature exposure. Silver sinter paste was printed in a shape of a tensile specimen on a Cu substrate, and was sintered at 250 °C for 1 h in air with no pressure. Specimens were exposed for 0, 50, 500, and 1000 h at 250 °C. Tensile strength was obtained at each ageing stage at a strain rate of 1.0×10−5/s. The evolution of microstructure...
This research focuses on revealing the effect of size and shape of Ag particles for mechanical properties of no-pressure sintered Ag by using micro-compression test. Specimens were fabricated by focused ion beam with the dimension of 5 μm × 5 μm × 15 μm. The stress-strain curve suggested that the sintered Ag subjected a stable elastic deformation and a large plastic deformation. The mechanical properties...
The mechanical properties of sintered porous Ag-paste are investigated by tension test and shear test in the temperature range from 25 °C to 300°C. Stress-strain curves of sintered porous Ag-paste are measured at different temperatures. The Poisson's ratio, which is calculated by Young's modulus and shear modulus, decreased from 0.31 at 25 °C to 0.11 at 300 °C. In addition, 3D finite element model...
Copper nanowire (CuNW) based conductor has been considered to be a potential alternative of indium tin oxide (ITO) film due to its low cost and high electrical conductivity. However, the existed methods for fabrication of CuNW conductors always involve high temperature, protection atmosphere, time-consuming transfer process, which greatly hindered the application of CuNW conductors. Here, a fast and...
Smart textiles such as wearable computers and health-care sensors on everyday clothing will be realized likely in the near future. Here, we report that highly electrical conductors were fabricated by filling half of the volume of a polyurethane elastomer with microsized silver flakes under a low temperature of 70 . Given the high affinity of polyurethane with silver flakes and substrates,...
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