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Long-Range Mass Transport during Structural Transitions in Metallic Glass-Forming Melts.
Phys Rev Lett 2019; 123(5):055502PR

Abstract

We investigate the structure and dynamics of the bulk metallic glass-forming alloys Zr_{41.2}Ti_{13.8}Cu_{12.5}Ni_{10}Be_{22.5} and Zr_{58.5}Cu_{15.6}Ni_{12.8}Al_{10.3}Nb_{2.8}. Combining in situ synchrotron x-ray diffraction and quasielastic neutron scattering with electrostatic levitation, we directly observe an abrupt change in the temperature dependence of the first structure factor maximum of these melts. We find that the kinetics of this liquid-liquid transition during cooling are on the order of tens of seconds, whereas its onset temperature depends only weakly on the applied cooling rate. Such slow transition kinetics require long-range mass transport, which is incompatible with a transition mechanism involving only local structural changes as in oxides or molecular liquids.

Authors+Show Affiliations

Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany.Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany.Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170 Köln, Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31491331

Citation

Jonas, I, et al. "Long-Range Mass Transport During Structural Transitions in Metallic Glass-Forming Melts." Physical Review Letters, vol. 123, no. 5, 2019, p. 055502.
Jonas I, Yang F, Meyer A. Long-Range Mass Transport during Structural Transitions in Metallic Glass-Forming Melts. Phys Rev Lett. 2019;123(5):055502.
Jonas, I., Yang, F., & Meyer, A. (2019). Long-Range Mass Transport during Structural Transitions in Metallic Glass-Forming Melts. Physical Review Letters, 123(5), p. 055502. doi:10.1103/PhysRevLett.123.055502.
Jonas I, Yang F, Meyer A. Long-Range Mass Transport During Structural Transitions in Metallic Glass-Forming Melts. Phys Rev Lett. 2019 Aug 2;123(5):055502. PubMed PMID: 31491331.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Long-Range Mass Transport during Structural Transitions in Metallic Glass-Forming Melts. AU - Jonas,I, AU - Yang,F, AU - Meyer,A, PY - 2019/04/12/revised PY - 2018/11/16/received PY - 2019/9/7/entrez PY - 2019/9/7/pubmed PY - 2019/9/7/medline SP - 055502 EP - 055502 JF - Physical review letters JO - Phys. Rev. Lett. VL - 123 IS - 5 N2 - We investigate the structure and dynamics of the bulk metallic glass-forming alloys Zr_{41.2}Ti_{13.8}Cu_{12.5}Ni_{10}Be_{22.5} and Zr_{58.5}Cu_{15.6}Ni_{12.8}Al_{10.3}Nb_{2.8}. Combining in situ synchrotron x-ray diffraction and quasielastic neutron scattering with electrostatic levitation, we directly observe an abrupt change in the temperature dependence of the first structure factor maximum of these melts. We find that the kinetics of this liquid-liquid transition during cooling are on the order of tens of seconds, whereas its onset temperature depends only weakly on the applied cooling rate. Such slow transition kinetics require long-range mass transport, which is incompatible with a transition mechanism involving only local structural changes as in oxides or molecular liquids. SN - 1079-7114 UR - https://www.unboundmedicine.com/medline/citation/31491331/Long-Range_Mass_Transport_during_Structural_Transitions_in_Metallic_Glass-Forming_Melts L2 - http://link.aps.org/abstract/PRL/v123/p055502 DB - PRIME DP - Unbound Medicine ER -