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Volume 3, Issue 2
ISSN: 2470-9905
Crystallography 2017
October 16-17, 2017
2
nd
International Conference on
October 16-17, 2017 | Chicago, USA
Applied Crystallography
Crystal genes in metallic liquids and glasses
Kai-Ming Ho
1, 2
1
Iowa State University, USA
2
Ames Laboratory, USA
I
t has been widely speculated that dominant motifs such as short-range icosahedral order can influence glass formation. Less
understood is how these motifs (crystal genes) in the liquid can influence phase selection upon devitrification. These crystal genes
are the underlying structural order that transcends liquid, glass and crystalline states. By comparing the amorphous states of the same
alloy compositions formed by sputtering and rapid solidification and their devitrification pathways, we can quantify the distribution
of the common packing motifs in the liquid or glass and in stable and metastable phases which form. We will discuss how this
approach brings new insight into the origin of vitrification and mesoscopic order-disorder transitions in condensed matter. A genetic
algorithm is applied to search for the energetically favorable stable and metastable crystal structures of complex metallic compounds
and a cluster alignment method reveals the most common packing motifs in crystalline and non-crystalline structures.
kmh@iastate.eduStruct Chem Crystallogr Commun, 3:2
DOI: 10.21767/2470-9905-C1-003