About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Chemistry and Physics of Interfaces
|
Presentation Title |
Understanding How Modifying the Thermal History Influences Abnormal Grain Growth in SrTiO3 |
Author(s) |
Vivekanand Muralikrishnan, Jackson Langhout, Amanda R Krause |
On-Site Speaker (Planned) |
Vivekanand Muralikrishnan |
Abstract Scope |
Abnormal grain growth (AGG) leads to a bimodal microstructure and, therefore, heterogeneous bulk properties. AGG in SrTiO3 is influenced by the thermal history. However, the underlying causes are unknown, thereby limiting our ability to predict or control microstructure evolution. Modifying thermal profiles has been shown to alter the grain boundary (GB) character and energy. So, this study will evaluate the effect of different heating profiles on the GB properties and AGG in SrTiO3 at 1425oC. We hypothesize that anisotropic grain boundary energy is necessary to nucleate abnormal grains, and high-energy GB planes act as nucleation sites. The different microstructural state's GB character and energy are characterized by electron-backscattered diffraction microscopy and atomic force microscopy. The results support the hypothesis by showing that a smaller fraction of abnormal grains are formed when a smaller fraction of high-energy GB planes are present before AGG. The implications of these results will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Characterization, Other |