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A reconstructive polyamorphous transition in borosilicate glass induced by irreversible compaction

Abstract : Understanding the response of glasses to high pressure is of key importance for clarifying energy-dissipation and the origin of material damage during mechanical load. In the absence of shear bands or motile dislocations, pressure-induced deformation is governed by elastic and inelastic structural changes which lead to compaction of the glass network. Here, we report on a pressure-induced reconstructive amorphous-amorphous transition which was detected in sodium borosilicate glass by Raman and Brillouin scattering. The transition occurs through the formation of four-membered danburite-type rings of BO4 and SiO4-tetrahedra. We suggest that the inelastic pressure-resistance is governed by the Si-O-Si-backbone of the mixed borosilicate network. We further show that compaction is accompanied by increasing structural homogeneity and interpret this as a universal phenomenon in non-crystalline materials.
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https://hal-univ-lyon1.archives-ouvertes.fr/hal-02311242
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Submitted on : Thursday, October 10, 2019 - 5:06:43 PM
Last modification on : Monday, October 19, 2020 - 1:55:53 PM

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S. Fuhrmann, Thierry Deschamps, Bernard Champagnon, L. Wondraczek. A reconstructive polyamorphous transition in borosilicate glass induced by irreversible compaction. Journal of Chemical Physics, American Institute of Physics, 2014, 140, pp.054501. ⟨10.1063/1.4863348⟩. ⟨hal-02311242⟩

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