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The aim of our research was to identify structures and chemical compositions of phases formed during internal oxidation of multi-component Ag –Zn – Mg-based alloys. Since the ability of inoculation mostly depends on large free energy of formation of oxides of microalloying elements and their crystallographic similarity,Mg in quantities of 0.001 – 0.5 mass% was selected as a micro-alloying element. These correspond to the quantities of 0.005 – 2.5 vol.% of MgO in the selected Ag– Zn-based alloys. Ag-based metal matrix, heterogeneous nuclei of MgO and oxide (ZnO) of the main alloying element were analysed by transmission electron microscopy (TEM). Structural inter-connections among them were also investigated and analysed.  In situ  phenomenon of heterogeneous nucleation of MgO and ZnO was proved.

TEM Analyses of Heterogeneous Nucleation of Internally Oxidised Multi-Component Ag–Zn-Based Alloys