About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Characterization of Minerals, Metals and Materials 2022
|
Presentation Title |
Investigation of MRO Clusters in Molten Marginal Metallic Glasses |
Author(s) |
Can Okuyucu, Doguhan Sariturk, İlkay Kalay, Yunus Eren Kalay |
On-Site Speaker (Planned) |
Can Okuyucu |
Abstract Scope |
Partial devitrification of the Al-RE marginal metallic glasses results in anomalous nucleation rate of nanocrystals disagreeing with the classical nucleation theory by several orders of magnitude. One of the theoretical approaches explaining this phenomenon is the medium-range order (MRO) structures present both in the quenched amorphous state and its liquid precursor. The MRO in marginal metallic glasses (also for covalent silicate glasses) is often associated with a pre-peak present in the diffraction pattern. In this regard, we used synchrotron-based high-temperature in-situ HEXRD experiments to monitor the characteristics of pre-peak and side-peak in molten Al-Sm alloys within the glass formation range. The formation of pre-peak in liquid is associated with the pseudo-crystalline Al11Sm3 fragments. The formation of Al11Sm3 like MRO clusters and the corresponding evolution of pre-peak in the diffraction pattern during in-situ melting of Al-Sm metallic glass will be discussed in detail. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Other, Other |