Abstract
The oxidation behavior of Ag-9.8Sn-1.3Bi-0.4Cu alloy powders is investigated used by XRD, SEM, EPMA and TEM. The results show that the oxidation behavior in air and air+Ag2O is different for Ag-9.8Sn-1.3Bi-0.4Cu microparticles, but that is similar for Ag-9.8Sn-1.3Bi-0.4Cu nanoparticles. The size of oxides formed in air is larger than that in air+Ag2O and the size of CuO is larger than that of SnO2 and Bi2Sn2O7. The oxides mainly distribute on powder surface in air oxidation, while those mainly distribute on grain boundaries in air+Ag2O oxidation. The nucleation priority order of oxides is SnO2 >Bi2O3 >Bi2Sn2O7 >CuO during oxidation both in air and air+Ag2O.
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