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@ARTICLE{Gao:173410,
author = {Gao, X. Z. and Müser, Martin and Kong, L. T. and Li, J.
F.},
title = {{A}tomic structure and energetics of amorphous-crystalline
{C}u{Z}r interfaces: a molecular dynamics study},
journal = {Modelling and simulation in materials science and
engineering},
volume = {22},
number = {6},
issn = {1361-651X},
address = {Bristol},
publisher = {IOP Publ.},
reportid = {FZJ-2014-06820},
pages = {065007},
year = {2014},
abstract = {The local order of the binary alloy CuZr differs between
the crystal (B2 phase) and the metallic glass (MG). In the
B2 phase, both Cu and Zr reside in the center of polyhedra
whose surfaces are composed of six tetragons and eight
hexagons. In the glass, many different polyhedra occur with
a large fraction of five-edged faces. However, little has
hitherto been known about the local order in the interfacial
region between glass and crystal. Using embedded-atom
potential based molecular-dynamics simulations, we find it
differs markedly from that in the glass. For example,
distinctly fewer pentagons occur on the surfaces of Voronoi
polyhedra in the interface than on those in the MG.
Moreover, there is an increased variety of polyhedra
allowing the interface to be more densely packed than the
MG. Details of the polyhedra distribution and consequently
various interfacial properties depend on the orientation of
the crystals and to some degree also on the thermal history
of the sample. For the investigated surfaces, we find that
the interfacial energy is the smallest and the
crystallization activation energy highest for the
closest-packed crystalline surface. This result can be
rationalized by the argument that the lattice spacing of the
closest-packed surface is most commensurate with the
wavelength associated with the density pair correlation
function of the disordered system. In practice, our result
implies that the reinforcement of MGs is longest-lived for
nanocrystals with close-packed surfaces.},
cin = {JSC},
ddc = {530},
cid = {I:(DE-Juel1)JSC-20090406},
pnm = {411 - Computational Science and Mathematical Methods
(POF2-411)},
pid = {G:(DE-HGF)POF2-411},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000341230900007},
doi = {10.1088/0965-0393/22/6/065007},
url = {https://juser.fz-juelich.de/record/173410},
}