|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIX
||Structural Influences on Glass Forming Ability in Mg-Ni-Y
||Carter Francis, Janine Erickson, John Sunderland, Chengrong Cao, Dan J Thoma, John H Perepezko, Paul G Voyles
|On-Site Speaker (Planned)
We have used 4-dimensional scanning transmission electron microscopy to show that Mg77Ni18Y5 has significant crystal-like ordering which gives rise to 4- and 6-fold rotational symmetries in nanodiffraction and icosahedral-like ordering which gives rise to 10-fold rotational symmetries. This alloy can be cast into 1 mm diameter rods and has a critical cooling rate between 20,000 and 30,000 K/s as measured by high thermal rate calorimetry. Symmetries in nanodiffraction were determined using the recently developed symmetry coefficient method, which, combined with high dimensional clustering methods, allows us to measure the size, approximate internal interatomic spacings, rotational symmetry, and spatial distribution of individual ordered clusters in the glass.