| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
| Presentation Title |
Grain Boundary Misorientation-Dependent Phase Transforming TiOx Polycrystals |
| Author(s) |
Alfredo Sanjuan Sanjuan, Edwin R García, Jarrod Lund, Shang Zhongxia, Noam Berstein, Steve Hellberg, Xinghang Zhang, Haiyan Wang |
| On-Site Speaker (Planned) |
Alfredo Sanjuan Sanjuan |
| Abstract Scope |
In many applications such as paint additive, microelectronics, batteries, etc., TiO2 plays an important role in contributing to the performance and reliability that they are part of. Experimentally, the formation of stoichiometric TiO2 has been found in the vicinity of grain boundaries, impacting the properties and microstructure evolution, particularly during processing. This work presents a phase field framework to predict the formation of stoichiometric TiO2 phases near the grain boundaries. Different driving forces, such as the mechanical compression applied to the sample, the electric field that results from a voltage difference across then polycrystal, the external oxygen atmosphere, and the grain boundary misorientation all impact on the phase transformation state of the sample. These mechanisms are explored to tailor the formation of stoichiometric phases to understand the driving forces to assess the internal redistribution of the dislocations and the phase transition that occur near the grain boundaries. |