Vibrational disorder and densification-induced homogenization of local elasticity in silicate glasses

Benzine O, Pan Z, Calahoo C, Bockowski M, Smedskjaer MM, Schirmacher W, Wondraczek L (2021)

Publication Type: Journal article

Publication year: 2021

Journal

Scientific Reports Nature Publishing Group: Open Access Journals - Option B

Book Volume: 11

Article Number: 24454

Journal Issue: 1

DOI: 10.1038/s41598-021-04045-6

Abstract

We report the effect of structural compaction on the statistics of elastic disorder in a silicate glass, using heterogeneous elasticity theory with the coherent potential approximation (HET-CPA) and a log-normal distribution of the spatial fluctuations of the shear modulus. The object of our study, a soda lime magnesia silicate glass, is compacted by hot-compression up to 2 GPa (corresponding to a permanent densification of ~ 5%). Using THz vibrational spectroscopic data and bulk mechanical properties as inputs, HET-CPA evaluates the degree of disorder in terms of the length-scale of elastic fluctuations and the non-affine part of the shear modulus. Permanent densification decreases the extent of non-affine elasticity, resulting in a more homogeneous distribution of strain energy, while also decreasing the correlation length of elastic heterogeneity. Complementary 29Si magic angle spinning NMR spectroscopic data provide a short-range rationale for the effect of compression on glass structure in terms of a narrowing of the Si–O–Si bond-angle and the Si–Si distance.

Authors with CRIS profile

Lothar Wondraczek

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Polska Akademia Nauk (PAN) / Polish Academy of Sciences PL Poland (PL) Aalborg University DK Denmark (DK) Johannes Gutenberg-Universität Mainz (JGU) DE Germany (DE)

How to cite

APA:

Benzine, O., Pan, Z., Calahoo, C., Bockowski, M., Smedskjaer, M.M., Schirmacher, W., & Wondraczek, L. (2021). Vibrational disorder and densification-induced homogenization of local elasticity in silicate glasses. Scientific Reports, 11(1). https://doi.org/10.1038/s41598-021-04045-6

MLA:

Benzine, Omar, et al. "Vibrational disorder and densification-induced homogenization of local elasticity in silicate glasses." Scientific Reports 11.1 (2021).

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