About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Phase Transformations in Ceramics: Science and Applications
|
| Presentation Title |
Phase-Diagrams in Nanocrystalline Oxides: Impacts of Surfaces and Grain Boundary Properties |
| Author(s) |
Ricardo Castro |
| On-Site Speaker (Planned) |
Ricardo Castro |
| Abstract Scope |
The nanoscale brings additional terms to the thermodynamic description of oxides. Particularly, the high surfaces and grain boundary energies increase the impact of those in energetic states, thus impacting phase stability diagrams. Here we discuss how surface and grain boundary energies can impact polymorphic stability predicted by conventional phase diagrams and further explore what happens in complex compositions when additives or dopants are added to the system. While zirconia is used as a base model for the discussion, other systems are presented to highlight the broad impact of the interfacial thermodynamics in the prediction of phase stability at the nanoscale. |