| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Phase Transformations in Ceramics: Science and Applications
|
| Presentation Title |
Microstructural Evolution of Single Crystal CoTi2O5: A Study Combining Experiment and Simulation |
| Author(s) |
Junyan Zhang, Connor McNamara, Animesh Kundu, Helen M. Chan, Jeffrey M. Rickman |
| On-Site Speaker (Planned) |
Junyan Zhang |
| Abstract Scope |
A duplex structure of CoTiO3 and TiO2 can react to form single crystal CoTi2O5 during heat-treatment. The transformation nucleates at the surface and proceeds inwards along the bi-phase boundaries; hence the potential exists to exploit the starting structure as a template for the product phase. The CoTi2O5 morphology and degree of transformation with depth was studied as a function of heat-treatment time and temperature. The potential parameters that control the morphology and reaction rate of CoTi2O5 were examined. SEM (scanning electron microscopy) and EBSD (electron backscattered diffraction) microstructural images were used to create digital templates for simulation. The rate of growth both along, and perpendicular to the phase boundaries was modelled using a stochastic numerical simulation that solves the pertinent reaction-diffusion master equation. Simulated data were compared with the microstructure to identify the influence of physical parameters. The potential of using this knowledge in microstructural design was discussed. |