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| 001 | 471712 | ||
| 005 | 20250724175814.0 | ||
| 024 | 7 | _ | |a 10.1016/j.actamat.2021.117300 |2 doi |
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| 100 | 1 | _ | |a Neuber, Nico |0 P:(DE-H253)PIP1083697 |b 0 |e Corresponding author |
| 245 | _ | _ | |a On the thermodynamics and its connection to structure in the Pt-Pd-Cu-Ni-P bulk metallic glass forming system |
| 260 | _ | _ | |a Amsterdam [u.a.] |c 2021 |b Elsevier Science |
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| 520 | _ | _ | |a 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. |
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| 700 | 1 | _ | |a Gross, Oliver |0 P:(DE-H253)PIP1031197 |b 1 |
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| 773 | _ | _ | |a 10.1016/j.actamat.2021.117300 |g Vol. 220, p. 117300 - |0 PERI:(DE-600)2014621-8 |p 117300 |t Acta materialia |v 220 |y 2021 |x 1359-6454 |
| 856 | 4 | _ | |u https://bib-pubdb1.desy.de/record/471712/files/2109_Thdyn_PtPd_system-revised.pdf |y Published on 2021-11-01. Available in OpenAccess from 2023-11-01. |
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