Volume and enthalpy relaxation in Zr55Cu30Ni5Al10 bulk metallic glass

O. Haruyama, Y. Nakayama, R. Wada, H. Tokunaga, J. Okada, T. Ishikawa, Y. Yokoyama

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81 Citations (Scopus)

Abstract

The structural relaxation in a Zr55Cu30Ni5Al10 bulk metallic glass was investigated by volume and enthalpy relaxation at various temperatures. The relaxation kinetics was well described by a stretched exponential relaxation function, Φ (t) = exp [- (t / τ)β]. The Kohlrausch index, β, ranged from 0.35 to 0.69, while the temperature dependence of relaxation time, τ was best fitted by the Vogel-Fulcher-Tanmmann formula, τ (T) = τ0 exp fenced(D* T0 / (T - T0)), with τ0 = 1.1 × 10-14 s, D* = 44.2 and T0 = 311 K. Atomic volumes in the equilibrium liquid region were measured by the electrostatic levitation method and these volumes, together with volumes of relaxed glasses, were better described by the Cohen-Grest model than by the Cohen-Turnbull model.

Original languageEnglish
Pages (from-to)1829-1836
Number of pages8
JournalActa Materialia
Volume58
Issue number5
DOIs
Publication statusPublished - 2010 Mar

Keywords

  • Bulk metallic glass
  • Enthalpy relaxation
  • Two-component model
  • Volume relaxation
  • ZrCuNiAl

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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    Haruyama, O., Nakayama, Y., Wada, R., Tokunaga, H., Okada, J., Ishikawa, T., & Yokoyama, Y. (2010). Volume and enthalpy relaxation in Zr55Cu30Ni5Al10 bulk metallic glass. Acta Materialia, 58(5), 1829-1836. https://doi.org/10.1016/j.actamat.2009.11.025