17 research outputs found
A sideâbyâside comparison of the solidification dynamics of quasicrystalline and approximant phases in the AlâCoâNi system
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/148264/1/aya2gv5001.pd
Dynamic Observation of Dendritic Quasicrystal Growth upon Laser-Induced Solid-State Transformation
We report the laser-induced solid-state transformation between a periodic âapproximantâ and quasicrystal in the Al-Cr system during rapid quenching. Dynamic transmission electron microscopy allows us to capture in situ the dendritic growth of the metastable quasicrystals. The formation of dendrites during solid-state transformation is a rare phenomenon, which we attribute to the structural similarity between the two intermetallics. Through ab initio molecular dynamics simulations, we identify the dominant structural motif to be a 13-atom icosahedral cluster transcending the phases of matter