|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials for Energy Conversion and Storage
||Disordered Structure Oxides for Energy Conversion and Storage
||Ritesh Sachan, William J Weber, Matthew F Chisholm, Yanwen Zhang
|On-Site Speaker (Planned)
The formation of metastable phases has attracted a significant attention due to its unique fast ionic conductivity characteristics. In the present study, we demonstrate the phase conversion of energetic ion irradiation induced amorphous nanochannels/tracks into metastable defect fluorite in A2B2O7 structured complex oxides by electron irradiation. Through in situ electron irradiation experiments in a scanning transmission electron microscope, we observe that energetic electrons generate thermalization and localized heating due to a coupled effect of nuclear and electronic energy-loss during electron-lattice atom interaction. We also show the role of cations at A-site (A = Yb, Gd and Sm) and B-site (Ti and Zr) as a function of ionic radii to facilitate the electron beam induced crystallization of amorphous phase. These results suggest employing the guided electron irradiation with atomic precision as a useful technique for selected area phase formation in nanoscale printed devices with high ionic conductivity.