Phase diagram and structural evolution of tin/indium (Sn/In) nanosolder particles: from a non-equilibrium state to an equilibrium state.
作者： Yang Shu , Teiichi Ando , Qiyue Yin , Guangwen Zhou , Zhiyong Gu
DOI: 10.1039/C7NR01402C
关键词:
摘要: A binary system of tin/indium (Sn/In) in the form nanoparticles was investigated for phase transitions and structural evolution at different temperatures compositions. The Sn/In nanosolder particles composition range 24-72 wt% In were synthesized by a surfactant-assisted chemical reduction method under ambient conditions. morphology microstructure as-synthesized analyzed scanning electron microscopy (SEM), high resolution transmission (HRTEM), selected area diffraction (SAED) X-ray (XRD). HRTEM SAED identified InSn4 In, with some Sn being detected XRD, but no In3Sn observed. differential calorimetry (DSC) thermographs exhibited an endothermic peak around 116 °C, which is indicative metastable eutectic melting In. When nanosolders subjected to heat treatment 50-225 equilibrium appeared while disappeared. state effectively attained 225 °C. Tammann plot DSC data indicated that about 62% °C heat-treated yielded 54% confirmed attainment boundaries estimated from matched well those established Sn-In diagram. transition behavior leads new understanding alloy nanoscale, provides important information their low temperature soldering processing applications.
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