| About this Abstract |
| Meeting |
2019 TMS Annual Meeting & Exhibition
|
| Symposium
|
Characterization of Materials through High Resolution Imaging
|
| Presentation Title |
Revealing the Growth Dynamics of Nature’s Forbidden Crystals |
| Author(s) |
Insung Han, Nancy Senabulya, Haiping Sun, Xianghui Xiao, Ashwin Shahani |
| On-Site Speaker (Planned) |
Ashwin Shahani |
| Abstract Scope |
How does a quasicrystal grow? Although there has been no lack of theoretical studies on quasicrystal growth, there have been very few experimental investigations with which to test their various hypotheses. To this end, we have recently performed synchrotron-based experiments on a thermodynamically stable decagonal (i.e., two-dimensional or 2D) quasicrystal in the Al-Ni-Co alloy system. High flux X-ray tomography enabled us to capture projections at temperature during continuous cooling. By reconstructing the data in three dimensions (3D) as a function of time (i.e., a 4D measurement), we were able to obtain new insights on the growth and dissolution pathways of the quasicrystals and related approximant phases. Our in situ studies provide the much-needed benchmark data that can be used to validate simulations and theories of the dynamic behaviors of complex intermetallics, including quasicrystals. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |