Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10629233 | Journal of the European Ceramic Society | 2016 | 9 Pages |
Abstract
Yttriaâstabilized zirconia is supposed to be a promising candidate as antiâcorrosion coating on steel tubes in wasteâtoâenergy (WTE) plants. Since the formation of lowâmelting eutectic salt melts on the surface of those tubes is a common process within WTE plants, the performance of yttriaâstabilized zirconia under these conditions was evaluated. Beads of 5 wt.â% Y2O3 stabilized zirconia were embedded in an equimolar mixture of KCl-K2SO4-ZnCl2-ZnSO4. In a temperature range between 600 and 700 °C under an atmosphere of N2-2.55 vol.â% HCl-0.45 vol.â% O2, a dissolution and recrystallization of the zirconia was observed. The driving force of this process is a changing electromotive force in combination with an increasing basicity of the melt, controlled by reactions between melt and atmosphere. With respect to an application as antiâcorrosion coating, the recrystallization process can enable the material to act as a selfâhealing coating.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Dirk Müller, Soraya Heuss-AÃbichler,