Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1476239 | Journal of the European Ceramic Society | 2010 | 6 Pages |
Abstract
A thermodynamic study was carried out in order to quantify the stability of yttrium silicates under different atmospheres (argon, air, moisture), and to predict their behaviour as an EBC. For this purpose, the partial pressures of gaseous species formed during the reactive vaporization in equilibrium with yttrium silicates were evaluated and compared to those over each oxide taken separately. The partial pressures of silicon and rare earth hydroxides at the equilibrium over rare earth silicates are lower than those over each single oxide. Thus yttrium silicates appear to be sufficiently stable to be promising materials to be used as environmental barrier coatings.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Emilie Courcot, Francis Rebillat, Francis Teyssandier, Caroline Louchet-Pouillerie,