Volume 107, Number 2, July 2014
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||16 July 2014|
Coupled relaxation processes in a glass forming ZrTiNiCuBe liquid
1 Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft-und Raumfahrt (DLR) 51170 Köln, Germany
2 Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II), Technische Universität München 85748 Garching, Germany
3 Lehrstuhl für Kristallographie und Strukturphysik, Friedrich-Alexander-Universität Erlangen-Nürnberg, Physik Department - 91058 Erlangen, Germany
Received: 6 May 2014
Accepted: 28 June 2014
We studied liquid Zr46.5Ti18.2Cu7.5Ni10Be27.5 in the temperature range from 1060 K to 1255 K using a combination of quasielastic neutron scattering and newly developed electrostatic levitation. We show that not only the microscopic incoherent and coherent relaxation times, and the derived mean self-diffusion coefficient of Ni/Cu/Ti, but also the macroscopic melt viscosity exhibit very similar temperature dependences. Thus, independent of the experimental time/length scales and the different natures of the relaxation times, the Maxwell relation of linear viscoelasticity holds, as a result of highly coupled structural relaxation processes in the melt.
PACS: 66.10.cg – Mass diffusion, including self-diffusion, mutual diffusion, tracer diffusion, etc. / 66.20.-d – Viscosity of liquids; diffusive momentum transport / 25.40.Fq – Inelastic neutron scattering
© EPLA, 2014
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