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Mixing effects in a ternary Hf-Zr-Ni metallic melt

Nowak, Benedikt and Holland-Moritz, Dirk and Yang, Fan and Evenson, Zachary and Meyer, Andreas (2018) Mixing effects in a ternary Hf-Zr-Ni metallic melt. Physical Review B, 97, 094202. American Physical Society. doi: 10.1103/PhysRevB.97.094202. ISSN 2469-9950.

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Official URL: https://journals.aps.org/prb/abstract/10.1103/PhysRevB.97.094202


We study the effect of the substitution of Zr by Hf on the dynamical behavior in the Zr36Ni64 melt. A reduced measured self-diffusion coefficient and a higher measured melt viscosity for an increased amount of Hf were observed. The ternary Hf10Zr25Ni65 melt, which exhibits a pronounced deviation from Arrhenius behavior over a studied temperature range of 550 K, can be accurately described by the scaling law of mode-coupling theory (MCT) with almost equal parameters for the self-diffusion and the viscosity. Although we only substitute alloy components with a nearly equal atomic size and the measured overall packing fraction remains almost unchanged, the dynamics in Hf10Zr25Ni65 are slower compared to Zr36Ni64. This corresponds also to a higher critical temperature Tc and might be induced by different chemical interactions in the melts. The increased Tc results in a significantly smaller difference between liquidus and critical temperature ΔTLC=TL−Tc for the ternary melt in comparison with Zr36Ni64, which may favor the glass formation in the Hf10Zr25Ni65 melt.

Item URL in elib:https://elib.dlr.de/119527/
Document Type:Article
Title:Mixing effects in a ternary Hf-Zr-Ni metallic melt
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Nowak, BenediktBenedikt.Nowak (at) dlr.deUNSPECIFIED
Holland-Moritz, DirkDirk.Holland-Moritz (at) dlr.deUNSPECIFIED
Yang, FanFan.Yang (at) dlr.deUNSPECIFIED
Evenson, ZacharyZachary.Evenson (at) dlr.deUNSPECIFIED
Meyer, Andreasandreas.meyer (at) dlr.deUNSPECIFIED
Date:8 March 2018
Journal or Publication Title:Physical Review B
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:094202
Publisher:American Physical Society
Keywords:Transport properties, amorphous materials, Quasi-elastic neutron scattering
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Research under Space Conditions
DLR - Research theme (Project):R - Material Design and New Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Nowak, Benedikt
Deposited On:28 Mar 2018 10:32
Last Modified:19 Oct 2021 09:30

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