| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
| Presentation Title |
Surface Energy Measurements of Yttrium Oxide |
| Author(s) |
Kavan Sanjaykumar Joshi, Jeremy Mason, Ricardo Castro |
| On-Site Speaker (Planned) |
Kavan Sanjaykumar Joshi |
| Abstract Scope |
Surface and grain boundary energies play an important role in the thermodynamic stability and sintering process of nanoceramics due to the large interfacial areas at the nanoscale. During sintering, the driving force is the reduction of interfacial energy. However, experimental thermodynamic data on surface energies, particularly free surface energies, are lacking. To address this gap, faceted nanocrystalline yttrium oxide with various dopants was synthesized by hydrothermal synthesis, and the morphology of these nanoceramics was studied using electron microscopy. Surface energies of specific planes were determined experimentally through water adsorption calorimetry. Spark Plasma Sintering was used to sinter disks with these anisotropic layered structures to study the anisotropy in mechanical properties. Molecular dynamic simulations were also conducted to estimate the free surface energies, and the segregation of dopants to the surface was studied based on their segregation enthalpies. |