| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Hume-Rothery Symposium on Alloy Microstructure Science and Engineering
|
| Presentation Title |
Self-assembled Nanostructures in Coherent Two-phase Systems: Crystallography Theory |
| Author(s) |
Yongmei M. Jin |
| On-Site Speaker (Planned) |
Yongmei M. Jin |
| Abstract Scope |
Self-assembled coherent nanostructures form during solid-state phase transformations to accommodate lattice misfit strain and minimize elastic energy. Coherent two-phase systems are of significant interest in exploring nanostructure-enabled novel material properties. As one example, a unique nanochessboard structure forms in several metal alloys and oxides. This talk presents a crystallography theory analysis of the coherent cubic-tetragonal two-phase mixtures. Two different types of coherent nanostructures with lamellar and chessboard morphologies observed in Mn-doped CoFe2O4 spinel are considered. The interphase boundary orientations, local crystal lattice rotations, and diffraction patterns are calculated and used to quantitatively interpret the experimental results of TEM imaging and electron diffraction reported in the literature. It is shown that combining the crystallography theory and TEM experiment provides an effective means to quantitatively understand the strain-mediated self-assembled nanostructures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, |