Wetting of YSZ by molten Sn-8Zr, Sn-4Zr-4Ti, and Sn-8Ti alloys at 800-900 °C

The wetting of 3% yttria-stabilized zirconia (YSZ) by Sn-8Zr, Sn-4Zr-4Ti, and Sn-8Ti alloys was studied at 800-900 degrees C. Both Zr and Ti improve the wettability via the formation of reaction products and adsorption. In the systems containing Zr additives in the alloys, ZrO2-x precipitates preferentially, and the wettability is dominated by interface adsorption. An anomalous temperature dependence was found in the final wettability of these systems owing to the decrease in adsorption with an increase in the temperature. The spreading dynamics are controlled by the dissolution of Zr, followed by the formation of a wetting ridge. The wettability of the Sn-8Ti/ YSZ system is dominated by the precipitation of reaction products (Ti2O3 and Ti11.31Sn3O10). The reaction ki-netics is the limiting factor for spreading in Sn-8Ti/YSZ, and the adsorption at the interface significantly decreased the energy barrier for wetting.

Automated summary

The presence of Zr and Ti improves the wettability of the alloys on yttria-stabilized zirconia, with the wetting process controlled by interface adsorption. Anomalous temperature dependence was observed in the final wettability, as increased temperature led to decreased adsorption.