Relaxation behavior of densified sodium aluminoborate glass

Veber A, Smedskjaer MM, de Ligny D (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Acta Materialia Elsevier

Book Volume: 198

Pages Range: 153-167

DOI: 10.1016/j.actamat.2020.07.068

Abstract

In this work, we study the relaxation behavior of a densified sodium aluminoborate glass by means of coupled Raman spectroscopy, Brillouin spectroscopy, and differential scanning calorimetry analyses. First, we show that the changes in elastic properties upon densification are largely associated with structural modifications in the glass network at shortand medium-range orders. Then, the evolution of the structural and elastic properties of the densified glass has been monitored in situ in the coupled DSC-Brillouin-Raman setup during isothermal annealing at different temperatures below the glass transition temperature. The stretched exponential function is found to well describe the observed relaxation kinetics, however, the stretching factor beta varies non-monotonically with temperature. In contrast, the Arrhenius behavior of the characteristic decay times is deduced by lifetime distribution analysis, revealing three different relaxation processes with typical activation energies of 170 +/- 25, 200 +/- 5, and 280 +/- 15 kJ/mol. The relative contributions of these processes to the overall relaxation kinetics are found to vary with the temperature as well as the type of parameter considered (structural, elastic, or thermal), and hence, the relaxation kinetics cannot be properly understood using the stretched exponent function. The possible origins of the different relaxation processes are discussed. (c) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Authors with CRIS profile

Dominique de Ligny Professur für Werkstoffwissenschaften (Glas und Keramik)

Involved external institutions

University of Tampere (UTA) / Tampereen yliopisto (Tay) FI Finland (FI) Aalborg University DK Denmark (DK)

How to cite

APA:

Veber, A., Smedskjaer, M.M., & de Ligny, D. (2020). Relaxation behavior of densified sodium aluminoborate glass. Acta Materialia, 198, 153-167. https://dx.doi.org/10.1016/j.actamat.2020.07.068

MLA:

Veber, A., M. M. Smedskjaer, and Dominique de Ligny. "Relaxation behavior of densified sodium aluminoborate glass." Acta Materialia 198 (2020): 153-167.

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