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@ARTICLE{Neuber:471712,
author = {Neuber, Nico and Gross, Oliver and Frey, Maximilian and
Bochtler, Benedikt and Kuball, Alexander and Hechler, Simon
and Gallino, Isabella and Busch, Ralf},
title = {{O}n the thermodynamics and its connection to structure in
the {P}t-{P}d-{C}u-{N}i-{P} bulk metallic glass forming
system},
journal = {Acta materialia},
volume = {220},
issn = {1359-6454},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PUBDB-2021-04560},
pages = {117300},
year = {2021},
abstract = {Contrary to basic hard sphere structure models, recent
studies revealed, significant structural differences between
Pt-Cu-Ni-P and Pd-Cu-Ni-P metallic glass-forming liquids
with the same stoichiometry. To cover the compositional
space between both systems, Platinum is subsequently
replaced by Palladium in the composition
(Pt/Pd)$_{42.5}$Cu$_{27}$Ni$_{9.5}$P$_{21}$. For this
systematic set of alloys, the thermodynamic properties, such
as isobaric heat capacity, enthalpy and Gibbs free energy
are assessed. A systematic drop of the Gibbs free energy
difference between crystal and liquid, providing a lower
estimate of the driving force for crystallization was
observed, underlining the high glass-forming ability of the
Pd-rich systems. Contrary to kinetic fragility data, a
change of the thermodynamic fragility can be observed,
drawing the picture of an increasing thermodynamically
strong behavior with rising Pd-content. Further the
temperature induced changes of the total structure factors
S(Q) were monitored using high-energy synchrotron X-ray
diffraction. Focus was laid on the changes on the
medium-range length scale, by analyzing changes of the first
sharp diffraction peak. Here a good correlation of the
changes in peak-width and the thermodynamic fragility was
found. From the determination of the excess enthalpy, large
amounts of residual enthalpy in the glassy state were
observed for the Pt-rich alloys, supporting the increased
ductility of these alloys. The current findings further
carve out the different roles of the topologically similar
Pt and Pd in the Pt/Pd-Cu-Ni-P alloy system and how the
change of the structural motifs on the medium range order is
structurally influencing thermal properties such as enthalpy
and heat capacity.},
cin = {PhotonScience},
ddc = {670},
cid = {I:(DE-H253)PhotonScience-20170411},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3) / FS-Proposal: I-20170938
(I-20170938)},
pid = {G:(DE-HGF)POF4-6G3 / G:(DE-H253)I-20170938},
experiment = {EXP:(DE-H253)P-P02.1-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000705535300008},
doi = {10.1016/j.actamat.2021.117300},
url = {https://bib-pubdb1.desy.de/record/471712},
}