|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Nanostructured Materials for Nuclear Applications
||Understanding the Nanoscale Disordering and Morphological Uncertainties in Radiation Induced Ion Tracks of Gd2TiZrO7 by an Analytical Electron Microscopic Perspective
||Ritesh Sachan, Matthew Chisholm, Yanwen Zhang, William J. Weber
|On-Site Speaker (Planned)
Energetic ion irradiation induces nanoscale disordering in atomic structure along the ion penetration due to electronic energy-loss, commonly known as an ion track. The nanosized ion tracks consist of disordered crystalline as well as amorphous phases in pyrochlore materials. In the present work, we discuss the insights of ion track formation with drastically varying track diameter even at a constant electronic energy-loss in pyrochlore structured Gd2TiZrO7. Through-focal series high angle annular dark field imaging (HAADF) in scanning transmission electron microscope is used to understand such track diameter variations. The ion track diameter variations are observed to be as large as ~60% within an extremely short penetration depth of ~20 nm. Though previous studies have shown track formation and average track diameter measurements, this work brings further clarity and explanations on why quantitative analysis of ion track formation in Gd2TixZr(1-x)O7 systems can be more complicated than the known ion track behavior.
||Planned: A print-only volume