| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Solid-state Optical Materials and Luminescence Properties
|
| Presentation Title |
Enhancing Strength in Nanocrystalline Transparent Ceramics |
| Author(s) |
Ricardo Castro |
| On-Site Speaker (Planned) |
Ricardo Castro |
| Abstract Scope |
Transparent ceramics are subjected to mechanical and thermal stresses during application, requiring optimized microstructures to overcome engineering barriers. While transparent nanocrystalline ceramics offer interesting opportunities in the field as the transmitted light wavelength becomes larger than the grain size itself, controlling the mechanical properties at the nanoscale requires deep understanding of the impact of the extensive grain boundary region. In this talk we discuss the role of grain boundaries in controlling hardness and toughness of transparent nanocrystalline ceramics. Using samples prepared by High Pressure Spark Plasma Sintering and with grain sizes down to the 10nm range, we particularly point out the role of grain boundary composition on the macromechanics of the pellets. Magnesium and zinc aluminates are used as model materials as we reveal segregated ionic dopants and off-stoichiometry play key roles in the design of transparent nanoceramics with high strength. |