About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
American Ceramic Society Journal Awards Symposium
|
| Presentation Title |
Engineering Grain Boundary Energy with Thermal Profiles to Control Grain Growth in SrTiO3 |
| Author(s) |
Vivekanand Muralikrishnan, Jackson Langhout, Daniel P. DeLellis, Kristy Schepker, Amanda Krause |
| On-Site Speaker (Planned) |
Amanda Krause |
| Abstract Scope |
This study investigates the influence of thermal history on grain boundary energy and the grain growth behavior of SrTiO3. Two thermal profiles were explored: a single-step sintering at 1425°C for 1 h and a two-step profile with sintering completed at 1425°C for 1 h and then 1350°C for 10 hr. Electron backscattered diffraction and atomic force microscopy were utilized to measure the grain size and grain boundary energy distributions, respectively, for the samples before and after grain growth at 1425°C for 10 h. The two-step profile exhibits fewer abnormal grains and a slower growth rate at 1425°C than the single-step profile. The growth behavior is correlated to the grain boundary energy distribution, which suggests that the two-step profile exhibits a lower driving force for grain growth. These results suggest that grain boundary engineering through thermal profile modification can be used to control the grain growth rate and abnormal grain growth. |