Abstract
Oxidation of Ag-Sn alloy powders is important technology for Ag-SnO2 electrical contact materials. Here the influence of oxidant on the oxidation behavior of Ag-5.08Sn-3.14Sb alloy powders was discussed. It can be found that the binding energy of all elements after oxidation in air is different from in air + Ag2O. Oxidation in air, the powder surface becomes rough and appears peeling, elements Sn, Sb and O distribute on the surface, oxides form on the powder surface. But oxidation in air + Ag2O, the powder surface is smooth, all elements uniformly distribute on the silver matrix and internal oxidation is occurred.
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