Fig. (11) Work of adhesion of the Nb-containing melts to the Al2O3-SiO2 oxides in dependence on SiO2 content in the oxide (● - Ni-40.5at.%Nb, 1250 °C; ■ - Au-10at.%Nb, 1250 °C; ♦ - Au- 20at.%Nb, 1320 °C).